WO2007068182A1 - 650nm plastic optical fiber transmission system - Google Patents

Abstract

A plastic optical fiber transmission system for 650nm wavelength is mainly composed of wavelength converters, an optical exchanger, and optical network cards, wherein the wavelength converters convert silica fiber signals for 1550nm or 1310nm or 850nm wavelength into plastic optical fiber signals for 650nm wavelength, and the wavelength converters, the optical exchanger and the optical network cards are connected by the plastic optical fibers whose rates of information transmission are 100Mbps.

Description

 650nm plastic optical fiber transmission system

 The present invention relates to a network device, and more particularly to a user terminal device of an optical network, that is, a commonly used "last mile" user terminal device.

Background technique

 The existing quartz fiber network information on the main line must be optical/electrical, electric/optical when accessing the user terminal. This conversion process not only affects the transmission speed, but also causes signal attenuation, information distortion, and is susceptible to external interference. It is also prone to information theft.

Summary of the invention

 The object of the present invention is to provide a 650 nm plastic optical fiber transmission system with fast, stable and safe signal transmission for end users.

 The invention mainly comprises a wavelength converter, an optical switch and an optical network card for converting a 1550 nm or 1310 nm or 8501 m quartz optical fiber signal into a 650 nm plastic optical fiber signal, and the wavelength conversion, the optical switch, and the optical network card sequentially pass the information transmission rate of 100 Mbps. Plastic fiber optic connection.

 According to the parameters of the plastic optical fiber, the spectral loss, the refractive index distribution and other parameters, the invention develops a plastic optical fiber with an information transmission rate of 100 Mbps and a working wavelength of 650 nm, and the wavelength converter can realize single mode and multimode. The fiber-optic signal converts the 1550nm, 1310nm, and 850nm quartz fiber signals into 650nm plastic fiber signals, and the transmission distance is more than 50m. The optical network card data transmission mode is optical/optical transmission, which replaces the current network card's optical/electrical, electric/light. Data transfer mode. The optical switch is a switching node in the all-optical network, and is an indispensable device in a high-speed, large-capacity data transmission system, and can be used to interconnect different optical transmission networks in a wide area. The invention always exists in the form of light when the optical information stream is transmitted and exchanged in the network, without having to undergo optical/electrical, electrical/optical conversion, and has good transparency, wavelength routing characteristics, compatibility and scalability. It has the characteristics of light weight, good toughness, easy interface, low comprehensive cost, good security performance, strong anti-interference ability, high transmission rate and low light source. It is the key to solving the last mile of information "all-optical network" and is also realized in the future. The best choice for triple play is the first choice for next-generation high-speed (ultra-high speed) broadband networks.

 The invention also concatenates at least one optical repeater on a continuous plastic optical fiber.

 When the optical transmission distance exceeds 50 meters, in optical network communication, the signal will be attenuated during the non-ideal channel transmission. Therefore, it must be amplified to transmit it further, and the optical signal will be transmitted. make up.

 The invention also connects the photoelectric converter through the plastic optical fiber on the optical switch, and the other end of the photoelectric converter is connected to the five types of wires.

 A computer that still uses existing Ethernet cards of various specifications can be connected to the all-optical network system, and a high information transmission rate can be obtained through the all-optical network, and the plastic optical fiber system can be effectively intercommunicated with the public information network to perform light throughout the entire network. Communication.

The wavelength converter includes a power supply circuit supplied to the whole system, a V25806 quartz optical fiber interface control circuit, a TODX2402 plastic optical fiber interface control circuit, two dielectric conversion control cores DM9331A, and a crystal oscillator circuit; the vibration-vibration circuit is connected to the power supply circuit, and the vibration-vibration circuit is further Two medium conversion control chips DM9331A are respectively connected, two medium conversion control chips DM9331A are connected to each other, and each medium conversion control chip DM9331A is respectively connected with V25806 quartz optical fiber interface control circuit and TODX2402 plastic optical fiber interface circuit. Wavelength converters are key components in all-optical networks. OBH-type wavelength converters are used in plastic optical fiber systems to integrate all-optical networks where 650nm optical wavelengths are converted to other optical wavelengths (1550nm _; 1310nm _; 850nm). In order to interconnect with other optical wavelengths (1550nm; 1310nm; 850nm) of quartz fiber. The plastic optical fiber system and the public information network can be intercommunicated to perform optical communication throughout the entire network.

 The optical switch includes two main control boards with the switch chip KS8999 as the core. The two main control boards are connected in parallel through the medium independent interface to form a 16-way switching system. Each chip KS8999 is integrated with eight physical layer transceivers. Each chip KS8999 has the following control and service function blocks: flow control, VLAN, priority processing, MAC lookup engine in 1K space, queue priority management, buffer management, 8 access controllers, 8 physical layer transceivers , E2PROM processor interface, LED working status display, ΜΠ/SM dedicated external interface, MAC interface.

 The optical switch uses an switched connection transport over Ethernet frames with optical interfaces at 650 nm optical wavelength, allowing individual users to share Internet access in a single LAN, and a single product can provide broadband Internet access for up to 96 users. And, you can connect to meet the needs of more users. The 650nm optical wavelength Fast Ethernet port of the optical switch can provide a dedicated link to the end user with a 650nm optical interface NIC PC, or connect another Ethernet switch/hub in front of the end user for shared sharing. The switch provides 100 Mbps of full-duplex configuration bandwidth for each end user, thus completely eliminating the bottleneck of dial-up access. Thanks to the optical interface, the configuration bandwidth is unobstructed enough to handle the most demanding environments.

 Ethernet switch devices support LEEE802.3X adaptive transmission mode, or select the best transmission rate, even in the case of overload, can maintain the maximum data integrity of storage and forwarding switching and flow control, flow control Adaptation also enables the switch to automatically prevent the port cache from becoming saturated.

 The optical network card is mainly composed of an IH00A main control chip, a PCI interface circuit with a bus width of 32 bits connected to the IP100A main control chip, a voltage conversion circuit, a fiber optic module interface circuit with a supply voltage of +3.3, an EEPROM memory, indicating data reception and transmission. The indicator circuit is composed of a 25MHz crystal oscillator circuit for the clock source of the main control chip.

 The optical network card is used in a computer terminal, and is interconnected by an optical fiber and an Internet. It has all the features of a general-purpose network card, takes advantage of the excellent features of the PIC bus and uses the bus master's working mode. Follow the Advanced Configuration and Power Interface (ACPI) feature to provide power management capabilities for the support system through hardware and operating system. The I/O interface is a 650 nm plastic optical fiber (POF) optical interface.

 The optical repeater is mainly composed of two optical transceiver modules, a DC/DC converter that supplies operating voltage for the optical transceiver module, and an AC/DC converter.

 Optical repeaters use a 650 nm optical relay where the distance is too long in a plastic optical fiber system integrated all-optical network. This product provides high-speed access network to achieve "fiber-to-the-home" all-optical transmission, providing a new generation of short-distance, high-bandwidth network transmission system that can meet technical requirements and reduce costs, and has important application value.

The optical repeater is mainly composed of a power conversion circuit, a fiber transceiver module power processing circuit, a fiber transceiver module IPi control circuit, and a fiber transceiver module JP ₂ control circuit. The power conversion circuit includes a 220V AC voltage converted into a +5V DC voltage circuit, and the optical fiber transceiver The module power processing circuit is connected to the +5V DC voltage output circuit, and the fiber transceiver module ΙΡι control circuit and the fiber transceiver module IP ₂ control circuit are respectively connected to the output end of the corresponding fiber transceiver module power processing circuit, and the input end of the fiber transceiver module IPt And the output end is respectively connected to the output end and the input end of the optical transceiver module Π> ₂ .

The photoelectric converter includes a power supply circuit, an optical interface circuit, an electrical interface circuit, which are supplied to the entire system, Two medium conversion control chip DM9331A, crystal oscillator circuit; crystal oscillator circuit is connected to the power supply circuit, the crystal oscillator circuit is respectively connected with two medium conversion control chips DM9331A, two medium conversion control chips DM9331A are connected to each other, and each medium conversion control chip DM9331A They are respectively connected to the optical interface circuit and the electrical interface circuit.

 A photoelectric conversion system consisting of two pieces of I) M9331A. They are connected to common Category 5 cable and 650nm plastic fiber through the ST88616 Category 5 TP electrical interface circuit and TODX2402 fiber interface circuit. The crystal oscillator circuit provides a clock source for the medium conversion chip. The medium conversion control chip DM9331A is a low-power, high-performance CMOS chip with all physical layer functions conforming to the IEEE802.3u standard, including the physical coding sublayer (PCS). Applicable to PECL compatible interface for fiber optic modules, it can automatically select full-duplex/half-duplex working mode, etc., to realize the conversion of optical signals of different wavelengths to 650nm optical signals, which can provide twisted pair (five-category line) The cable is connected directly to the 100Base-Tx Fast Ethernet interface and can also be connected to an external fiber transceiver via the PECL interface.

DRAWINGS

 1 is a working principle diagram of the present invention; FIG. 2 is a block diagram of a wavelength converter; FIG. 3 is a circuit schematic diagram of a wavelength converter; FIG. 4 is a circuit schematic diagram of a wavelength converter; Figure 3 is the circuit schematic diagram of the converter; Figure 6 is the circuit schematic diagram of the wavelength converter; Figure 7 is the circuit diagram of the wavelength converter; Figure 8 is the schematic diagram of the optical switch; Figure 9 is the optical switch Figure 10 is the circuit schematic diagram of the optical switch; Figure 1 is the circuit schematic diagram of the optical switch; Figure 12 is the circuit schematic diagram of the optical switch; Figure 13 is the optical switch Figure 5 is a circuit schematic diagram of the optical switch; Figure 15 is a schematic diagram of the display circuit of the optical switch; Figure 16 is a structural block diagram of the optical network card; Figure 1 is one of the circuit schematic diagrams of the optical network card Figure 18 is the circuit schematic diagram of the optical network card; Figure 19 is the circuit schematic diagram of the optical network card; Figure 20 is the block diagram of the optical repeater; Figure 21 is the schematic diagram of the optical repeater circuit; 22 is Figure 23 is a block diagram of the photoelectric converter; Figure 23 is a circuit schematic diagram of the photoelectric converter; Figure 25 is the circuit schematic diagram of the photoelectric converter; Figure 26 is the photoelectric schematic of the photoelectric converter; The fourth schematic of the converter.

Detailed ways

 As shown in Figure 1, the optical switch is connected to the repeater through a plastic optical fiber with an information transmission rate of 100 Mbps, and the plastic optical fiber is connected to 14 wavelength converters. Each of the wavelength converters passes through 1550 nm or 13 1 Onm or 850 nm quartz. The optical fibers are connected to optical network cards of computer terminals 3 to 16.

 The optical switch also connects the optical network cards of the computer terminals 1 and 2 through plastic optical fibers, repeaters, and plastic optical fibers.

 The optical switch is connected to the common network card of the computer of various specifications of the Ethernet card through the plastic optical fiber and the photoelectric converter and the Category 5 cable.

 As shown in Figures 2, 3, 4, 5, 6, and 7, the wavelength converter includes a power supply circuit supplied to the entire system, a V25806 quartz optical fiber interface control circuit, a TODX2402 plastic optical fiber interface control circuit, and two medium conversion control chips DM9331A. Crystal oscillator circuit; crystal oscillator circuit is connected to the power supply circuit, the crystal oscillator circuit is respectively connected with two medium conversion control chips DM9331A, two medium conversion control chips DM9331A are connected to each other, and each medium conversion control chip DM9331A and V25806 quartz optical fiber interface control circuit respectively , TODX2402 plastic optical interface circuit control connection. Two media conversion control chips, the DM9331A, are also connected to the LED driver circuit.

The crystal oscillator circuit is connected to the +3.3V output of the DC/DC converter, and the AC/DC power converter is externally connected to 220V AC. The AC/DC power converter converts 220V AC into a +5V DC output. The output is connected to the input of the DC/DC converter, and the DC/DC converter is also connected to two media conversion control chips DM9331A.

 The plastic optical fiber interface control circuit includes a medium conversion control chip DM9331AN4, an optical module power supply circuit connected to the medium conversion control chip DM9331AN4, a semi-full duplex conversion circuit, an indicator circuit, and a plastic optical interface circuit. The plastic optical fiber interface circuit is mainly composed of TOSHIBA's optical transceiver module TODX2402, which constitutes 8 data input/output channels on the physical layer of the switch, and connects the bidirectional data to the RX+/FXRD+ of the dielectric conversion chip DM933 1 A, RX-/ FXRD, TX+ FXTD+,, ΤΧ-ZFXT'D-, and other four I/O pins independently realize the transmission and reception of optical signals under the control of the FXSD1 signal.

 When the voltage value of the optical signal detection pin FXSD18 of the optical switch chip is greater than 0.6V, the port operates in 100BaseFX mode, and when 0.6V<VFXSDn<1.25V, FXSDn is low, and the optical signal connection indicates "off". : When VFXSDn>1.25V, FXSDn is high and the optical signal connection indicates "lighting".

 The quartz optical fiber interface control circuit includes a medium conversion control chip DM9331AN2, a voltage conversion circuit connected to the medium conversion control chip DM9331AN2, a semi-full duplex conversion circuit, an indicator light circuit, and a quartz optical fiber interface circuit.

 Two working status indicators show the dynamic operating status of the optical wavelength converter, such as data transmission, error conditions, and so on.

 DIAG-STO—diagnostic status output, when DIAG-ACT=1 and in FX mode,

D1AG—ST 1 represents the successful connection of the light; =0 represents the failure of the connection of the fiber. Used for automatic loopback testing.

 FX_LINK/ACT one connection or activity indicator.

 FX one; FAULTLED~FX mode, indicating fiber signal error.

 Optical transceiver module TODX2402 and media conversion chip DM9331 Α signal interface is 3.3 volt PECL interface.

 As shown in Figures 8 to 15, the optical switch consists of a power supply circuit, a main control chip KS8999-208, a filter circuit, a 25MHz crystal oscillator circuit, and eight sets of plastic optical fiber interface circuits.

 The power supply circuit includes a 220V AC voltage to a +5V DC voltage circuit, a +5V DC voltage to a +3.3V DC voltage circuit, and a +5V DC voltage to a +2.0V DC voltage circuit. The above two transformer circuits are respectively MIC29302BT stabilized. Pressure device.

 The filter circuits are respectively connected to the output terminals of the +2.0V DC voltage, and each group of plastic optical fiber interface circuits is composed of an integrated circuit TODX2402 and an auxiliary circuit.

In the plastic optical fiber 1 interface circuit, the integrated circuit TODX2402 pin 1 and the foot 11, 12, 13, 14 are grounded, the foot 2 is connected to the foot 196 of the main control chip KS8999-208 through the capacitor d, and the foot 3 is connected to the main control chip KS8999-208 through the capacitor C2. Pin 1 97, pin 4 is connected to pin 190 of transistor V!, V ₂ resistor R ₉ , R ₁₀ , Ru, Ri2 Ria master chip KS8999_208, pin 5, pin 7 is connected to +3.3V DC voltage power supply, foot 6 then VCCT1, pin 8 ίί connected through capacitor C ₄ 200 feet KS8999_208 master chip, the master chip connected to pin ₉₃ by a pin 199 a capacitance C KS8999 208.

In the plastic optical fiber 2 interface circuit, the integrated circuit TODX2402 pin 1 and the foot 1 1 , 1 2 , 1 3 , 1 4 are grounded, the foot 2 is connected to the foot 206 of the main control chip KS8999_208 through the capacitor C ₇ , and the foot 3 is connected to the main control through the capacitor C ₈ The pin 207 of the chip KS8999-208, the pin 4 is connected to the pin 191 of the main control chip KS8999-208 through the R3⁄4 resistor R ₂₁ , the transistor V ₃ , the 1⁄4 , the resistor R ₂₂ , the R ₂₃ , the R ₂₄ , the R ₂₅ , the R ₂₆ . 5, pin 7 connected to +3.3 V DC voltage source, connected to pin 6 VCCT2, KS8999_208 pin 8 connected to the master chip via the capacitor C 204 of ₆ feet, 9 feet pin 203 KS8999 a control chip 208 via the capacitor C _5.

In the plastic optical fiber 3 interface circuit, the integrated circuit TOD^2402 pin 1 and pin 1 1 , 1 2, 1 3, 14 are grounded. The pin 2 is connected to the pin 5 of the main control chip KS8999__208 through the capacitor C ₉ , and the pin 3 passes through the capacitor C _{1 ( )} connected to the master The pin 6 of the chip KS8999-208, the pin 4 is connected to the pin 192 of the main control chip KS8999-208 through the resistor R ₃₄ , the transistors V ₅ , V ₆ , the resistors R ₃₅ , R ₃₆ , R ₃₇ , R ₃₈ , R ₃₉ . 5, foot 7 is connected to +3.3V DC voltage power supply, foot 6 is connected to VCCT3, pin 8 ίίϊΐ capacitor C _{12 is} connected to the foot 1 0 of the main control chip KS8999-208, pin 9 is connected to the foot of the main control chip KS8999-208 through the capacitor C„ 9.

The plastic optical fiber 4 in the interface circuit IC TODX2402 pins 1 and 11, 12, 13, 14 to ground, pin 2 connected to the master chip KS8999_208 foot via the capacitor C ₁₅ 22, pin 3 connected via a capacitor C ₆ 208 a master chip KS8999 The foot 23, the foot 4 is connected by the power |1 ₇ , the transistors V ₇ , V ₈ , the resistors ₈ , ₉ , R ₅₀ , R ₅₁ , _{2 the} main control chip KS8999 208 feet 1 93 , the feet 5 and 7 are connected + 3.3V DC power supply voltage, pin 6 connected VCCT4, pin 8 through the capacitor C _I4 KS8999- 208 connected to main chip 20 feet, 9 feet KS8999-208 pin 19 master chip via the capacitor C _13.

In the plastic optical fiber 5 interface circuit, the integrated circuit ϊθϋΧ2402 pin 1 and the foot 11, 1 2, 1 3, 14 are grounded, the foot 2 is connected to the foot 30 of the main control chip KS8999-208 through the capacitor C ₁₇ , and the foot 3 is connected to the main control through the capacitor C ₁₈ Chip KS8999-208 pin 3 1, pin 4 through the electrical 3⁄4 Rgo, transistor V ₉ , V ₁₀ . The resistors 1^, 2, ₃ , R64, _{5 are} connected to the foot 68 of the master chip KS8999-208, the foot 5, the foot 7 connected to + 3.3V DC voltage source, connected to pin 6 VCCT5, pin 8 ii capacitance C ₂ o KS8999- 208 connected to main chip 34 feet, 9 feet by _3,319 feet capacitor C connected to the master chip KS8999- 208.

In the plastic optical fiber 6 interface circuit, the integrated circuit TODX2402 pin 1 and pin 1 1 , 1 2, 1 3, 14 are grounded, the pin 2 is connected to the pin 47 of the main control chip KS8999_208 through the capacitor C ₂₃ , and the pin 3 is connected to the main control chip through the capacitor C ₂₄ The foot 48 of the KS8999_208, the foot 4 is connected to the leg 69 of the main control chip KS8999-208 through the electric R ₇₃ , the transistors Vu, V ₁₂ , the resistors R ₇₄ , R ₇₅ , R ₇₆ , R ₇₇ , R ₇₈ , the feet 5 and 7 then + 3.3V DC voltage source, connected to pin 6 VCCT6, pin 8 ii capacitor C ₂₂ connected to a control chip 208 KS8999 44 feet, 9 feet by capacitance C KS8999- 208 feet 43 ₂₁ master chip bonding.

In the plastic optical fiber 7 interface circuit, the integrated circuit TODX2402 pin 1 and the foot 11, 12, 13, 14 are grounded, the foot 2 is connected to the pin 54 of the main control chip KS8999-208 through the capacitor C ₂₅ , and the pin 3 is connected to the main control chip KS8999 through the capacitor C ₂₆ The foot 55 of the 208, the foot 4 is connected to the foot 70 of the main control chip KS8999-208 through the electric ₆ , the transistors V ₁₃ , V ₁₄ , the resistors ₇ , 8 , ₉ , R ₉ o , R ₉₁ , and the legs 5 and 7 are connected + 3.3V DC voltage source, connected to pin ό VCCT7, pin 8 ii capacitor C ₂₈ connected to the master chip KS8999-208 58 feet, 9 feet pin KS899 a control chip 57 via the capacitor 2089 C _27.

In the plastic optical fiber 8 interface circuit, the integrated circuit TODX2402 pin 1. and the foot 11, 12, 13, 14 are grounded, the foot 2 is connected to the foot 64 of the main control chip KS8999-208 through the capacitor C ₃₁ , and the foot 3 is connected to the main control chip through the capacitor C ₃₂ The foot 65 of the KS8999-208, the foot 4 is connected to the pin 71 of the main control chip KS8999-208 through the electric pole R ₉₉ , the transistor V ₁₅ , the V ₁₆ > the resistor ₀₀ , the Rioi R , the Rio 3 RIM , and the foot 5 and the foot 7 are connected to the +3.3 V DC voltage power supply, pin 6 is connected to VCCT8, pin 8 is connected to capacitor C ₃ o to pin 62 of the main control chip KS8999-208, and pin 9 is connected to pin 6 1 of the main control chip KS8999-208 through capacitor C ₂₉ .

The above transistors 1⁄4, V ₂ , V ₃ , V ₄ , V ₅ , V ₆ , Ϋ ₇ , V ₈ , V ₉ , V ₁₀ , V _n V ₁₂ , V ₁₃ , Vi4 , Vi5 , Vi6 are all 9013SMD ( SOT23 ) Transistor.

 The 25MHz crystal oscillator circuit is connected to pins 176 and 177 of the master chip KS8999_208.

The connectors XP1 and XP2 are flat cable sockets FC20P, V _r32 is a green LED, and V ₃₃ is a red LED.

 As shown in Figures 16 to 19, the optical network card voltage conversion circuit includes: a +5V DC voltage to +3.3V DC voltage DC-DC conversion circuit. The converted +3.3V is mainly used to supply various chips and fiber interface circuits on the network card.

The voltage conversion circuit of the optical network card includes a +5V voltage power supply +3.3V voltage power supply circuit and +3.3V The voltage power supply is turned to a +2.5V voltage power supply circuit, and a filter analog power supply circuit and a digital power supply circuit are respectively disposed at the +5V voltage output terminal and the +3.3V voltage output terminal.

 The IP100A master chip is a single-chip, full-duplex, 10M 1 100M adaptive Ethernet MAC+PHY, EEEE802.3 compliant, adapts to 10000-TX/100BASE-FX 10BASE-T, and has a 32-bit PCI interface. The chip is available in a 128-pin PQFP package.

 The power supply circuit of the fiber optic module interface is connected to the +5V power supply voltage output terminal of the PCI interface via the filter circuit, and the +5V power input end of the voltage conversion circuit is connected to the A side of the PCI interface 5, 8, 61, 62 and B face 5 6, 6, 1, 1, 62.

 The EEPROM memory pins 6 and 8 are connected to the +3.3V voltage supply of the PCI interface. The pin 1 is connected to the pin 28 of the IP100A main control chip, the pin 2 is connected to the pin 17 of the IPI00A main control chip, and the pin 3 and the IP100A are controlled. The pin 18 of the chip is connected, the pin 4 is connected to the leg 22 of the EP100A main control chip, and the pin 5 is grounded.

 The pins 3, 7, and 8 of the BOOTROM memory are connected to the +3.3 V voltage power output of the PCI interface. The pin 1 is connected to the pin 27 of the IP100A main control chip, the pin 2 is connected to the pin 22 of the IP100A main control chip, and the pin 4 is grounded. The pin 5 is connected to the pin 18 of the IH00A main control chip, and the pin 6 is connected to the pin 17 of the IP100A main control chip.

The indicator circuit for instructing data reception and transmission comprises an LED light-emitting diode and a circuit in which the resistors are serially connected, and two LED light-emitting diodes LED^LED ₂ are respectively connected in parallel to the +3.3V power supply voltage output end of the PCI interface, and the light-emitting diode The LE series resistor is connected to the pin 21 of the IP100A master chip, and the resistor R ₂ in series with the LED LED _{2 is} connected to the pin 16 of the IP100A master chip.

The input terminal XTALj of the 25MHz crystal oscillator circuit is connected to the pin 32 of the IPI00A main control chip, and the output terminal XTAL _{2 is} connected to the pin 31 of the IP100A main control chip.

 As shown in Figures 20 and 21, the optical repeater consists of two fiber transceiver modules, DC/DC converters and AC/DC converters, and power indicator LEDs.

 The invention is provided with a 220V AC voltage converted into a +5V DC voltage circuit, a fiber transceiver module power supply processing circuit, a fiber transceiver module IP! control circuit and a fiber transceiver module 3⁄4 control circuit.

The fiber transceiver module power processing circuit is connected to the +5V DC voltage output circuit, and the fiber transceiver module 控制ί control circuit and the fiber transceiver module Π> ₂ control circuit are respectively connected to the output end of the corresponding fiber transceiver module power processing circuit, and the fiber transceiver module IPi The input end and the output end are respectively connected to the output end and the input end of the optical transceiver module IP ₂ .

The optical transceiver module lPi control circuit and the optical transceiver module EP ₂ control circuit are respectively composed of analog integrated circuits N1, N2 and peripheral circuits. The analog integrated circuits N1 and N2 are TODX2404 or TODX2402 analog integrated circuits.

 The analog ICs N1, N2, pin 1, pin 9, pin 11, 12, 13, 14 are grounded respectively, the pin 5 is connected to +5V DC voltage, and the analog integrated circuit N1 pin 2 is connected with the analog integrated circuit N2 pin 9. The analog integrated circuit N1 pin 3 is connected to the analog integrated circuit N2 pin 8. The pin 8 of the analog integrated circuit N1 is connected to the pin 3 of the analog integrated circuit N2, and the pin 9 of the analog integrated circuit N1 is connected to the pin 2 of the analog integrated circuit N2. .

Connect the resistor between the pin 2 and the pin 1 of the analog integrated circuit N1, and connect the resistor R ₂ between the pin 3 and the pin 1. The pin 6 of the analog integrated circuit N1 is connected to the +5¥ DC voltage output terminal through the inductor 1 and the inductor! _2, and the other end of the capacitor ^ ^ ends are also connected to the capacitor and the capacitor C are respectively connected to the pin 1, ₂ and between the capacitance C ₂ and the inductor, the other end of the resistor and the parallel resistance R 2 feet, respectively, Pin 3 is connected, pin 7 is connected to +5V DC voltage output terminal, pin 7 and pin 8 are connected to resistor R ₅ , pin 7 and pin 8 are connected in series with resistor and capacitor C ₃ , and pin 7 and pin 9 are connected to each other. R ₇ , foot 9 also passes the resistor Rg is grounded, and capacitor C ₃ and capacitor C4 are connected in parallel between the ground terminal and the inductor ∑.

The resistor R ₉ is connected between the pin 2 and the pin 1 of the analog integrated circuit N2, and the resistor Rn is connected between the pin 3 and the pin 1. The pin 6 of the analog integrated circuit N2 is connected to the +5V DC voltage output terminal through the inductor L ₂ , the inductor L _{The two} ends of the two are respectively connected to the capacitor C ₅ and the capacitor C ₆ , and the other ends of the capacitors C ₅ and C ₆ are respectively connected to the pin 1, and the resistors R ₁₍₎ and R ₁₂ are connected in parallel between the capacitor C ₆ and the inductor L ₂ . The other ends of the resistors R ₁₍₎ and R ₁₂ are respectively connected to the legs 2 and 3, the leg 7 is connected to the +5 V DC voltage output terminal, and the leg 7 and the pin 8 are connected between the resistor R ₁₃ and the leg 7 and the leg 8 The resistor R ₁₄ and the capacitor C ₇ are also connected in series, the resistor R ₁₅ is connected between the leg 7 and the leg 9, the pin 9 is also grounded through the resistor R ₁₆ , and the capacitor C ₇ and the capacitor C ₈ are also connected in parallel between the ground terminal and the inductor L ₂ .

+ 5V DC voltage output of the power converter circuit is connected to the power supply circuit indicator, power indicator circuit by the light emitting diode LED and the resistor R ₁₇ in series, the positive terminal of the light emitting diode LED is connected to the + 5V DC voltage output terminal of the power conversion circuit, One end of the resistor R ₁₇ is grounded.

 If there are two 650nm Ethernet switches A and B to be interconnected, and the distance between the two is 80m, then there is no direct interconnection. It is necessary to add a 650nm optical repeater, and a pair of 40m long 650nm polymer fiber will be used. The external line transceiver end of switch A is connected to the optical port 1 (or optical port 2) of the transceiver end of the 650 nm optical repeater. The external line transceiver end of switch B and the 650 ml optical repeater are connected by a pair of 650 nm polymer fiber with a length of 40 m. The other transceiver port 2 (or optical port 1) is connected, thus completing the interconnection of two 650nm Ethernet switches.

 As shown in Figures 22 to 26, the RJ45 interface of the photoelectric converter consists of a dielectric conversion control chip DM9331 A N3 and a TP interface circuit connected to N3, a crystal oscillator circuit, an automatic, full-duplex selection indicating circuit, and a transformer circuit.

 The power supply circuit of the photoelectric converter includes two parts:

 — It is an AC/DC converter circuit with 220V AC voltage + 5V DC voltage. The allowable AC input is 150V~264V, 50/60Hz, the output voltage accuracy is ±1%, and the ripple factor is less than 1%.

 The second is a DC/DC converter circuit with +5v DC voltage to +3.3V DC voltage. The converted +3.3V is mainly used to supply the chip DM9331 and the fiber interface circuit. Set the 2.2uH inductor and filter capacitor between the ground of the power supply.

 The indicator circuit consists of a resistor and a series of LEDs.

 The optical signal interface circuit is composed of a medium conversion control chip DM9331 N2 and an optical interface circuit connected with N2, an optical module power supply circuit, an optical module direction converter, a semi-full duplex conversion and an indication circuit, and the optical interface circuit is connected by a connector TODX2402 and a resistor. composition.

 An indicator circuit is also provided on the optical signal interface circuit.

 The optical conversion control chip N2 of the optical signal interface circuit is connected to the 50 MHz crystal power supply output terminal.

 The pin 17 of the chip N2 is connected to the pin 14 of the chip N3, the leg 19 of the chip N2 is connected to the leg 28 of the chip N3, the leg 20 of the chip N2 is connected to the leg 29 of the chip N3, the leg 21 of the chip N2 and the leg of the chip N3. 37 is connected, the pin 24 of the chip N2 is connected to the pin 24 of the chip N3, the leg 25 of the chip N2 is connected to the leg 25 of the chip N3, the leg 26 of the chip N2 is connected to the leg 17 of the chip N3, and the pin 28 and the chip of the chip N2 The leg 19 of the N3 is connected, the leg 29 of the chip N2 is connected to the leg 20 of the chip N3, the leg 37 of the chip N2 is connected to the leg 21 of the chip N3, and the leg 40 of the chip N2 is connected to the leg 40 of the chip N3.

The TXEN end of one medium conversion control chip DM9301A is cross-connected with the RXDV end of another medium conversion control chip DM9301A, and the RXD end of one media conversion control chip DM9301A is cross-connected with the TXD end of another media conversion control chip DM9301A, two The FXRD end and the FXTD end of the media conversion control chip DM9301A are externally connected. Two media conversion control chips The OSCIN terminal of the DM9301A is connected to the 50MHz crystal power supply output.

 Optical fiber transceiver interface circuit: Mainly composed of TOSHIBA's optical transceiver module TODX2402, which constitutes 8 data input/output channels on the physical layer of the switch, and connects the bidirectional data to RX+/FXRD+, RX-/FXRD of the media conversion chip DM9331. TX+/FXTD+, , TX-/FXTD-, and other four I/O pins independently transmit and receive optical signals under the control of the FXSD1 signal.

 When the voltage value of the optical signal detection pin FXSD18 of the optical switch chip is greater than 0.6V, the port operates in 100BaseFX mode, and when 0.6V<VFXSDn<1.25V, FXSDn is low, and the optical signal connection indicates "off". When VFXSDn>1.25V, FXSDn is 髙 level, and the optical signal connection indication is “lighted up”.

 The photoelectric converter displays the dynamic working state of the photoelectric converter through two working status indicators, such as data transmission and error conditions.

 DIAG-STO~diagnostic status output, when D1AG_ACT=1 and in FX mode,

DIAG—STO-1 means the light connection is successful; =0 means the fiber connection fails. Used for automatic loopback testing.

 LENK/Acl—Connection or activity indicator. .

 In the FX-FAULTLED~FX mode, the fiber signal is incorrect.

 The signal interface of the optical transceiver module TODX2402 and the media conversion chip DM9331 A is 3.3 volt PECL interface.

Claims

Claim  1. A 650nm plastic optical fiber transmission system, which is mainly composed of a wavelength converter, an optical switch, an optical network card, which converts a 1550un or 1310nm or 850nm quartz optical fiber signal into a 650nm plastic optical fiber signal, a wavelength converter, an optical switch, and a light The network cards are connected in turn by plastic optical fibers with an information transmission rate of 100 Mbps.  2. The 650 nm plastic optical fiber transmission system according to claim 1, wherein at least one optical repeater is serially connected to the continuous plastic optical fiber.  3. The 650 nm plastic optical fiber transmission system according to claim 1, wherein the optical switch is further connected to the photoelectric converter through a plastic optical fiber, and the other end of the photoelectric converter is connected to the five types of wires.  4. The 650 nm plastic optical fiber transmission system according to claim 1 or 2 or 3, wherein the wavelength converter comprises a power supply circuit supplied to the entire system, a V25806 quartz optical fiber interface control circuit, a TODX2402 plastic optical fiber interface control circuit, and two mediums. Conversion control chip DM9331A, crystal oscillator circuit; crystal oscillator circuit is connected to the power supply circuit, the crystal oscillator circuit is respectively connected with two medium conversion control chips DM9331 A, two medium conversion control chips DM9331A are connected to each other, and each medium conversion control chip DM9331A and V25806 quartz optical fiber interface control circuit, TODX2402 plastic optical fiber interface circuit control connection.  The 650nm plastic optical fiber transmission system according to claim 4, wherein the optical switch comprises two main control boards with the switching chip KS8999 as the core, and the main control board of the commercial block is connected in parallel via the medium independent interface to form a 16-way exchange. System; each physical chip KS8999 integrates eight physical layer transceivers, each chip KS8999 has the following control and service function blocks: flow control, VLAN, priority processing, 1K space MAC search engine, queue priority management, Cache management, .8 access controllers, 8 physical layer transceivers, E2PROM/processor interface, LED [for status display, MII/SNI dedicated external interface, MAC interface.  6. The 650 nm plastic optical fiber transmission system according to claim 5, wherein the optical network card is mainly composed of an I P100A main control chip, a PCI interface circuit with a bus width of 32 bits connected to the EP100A main control chip, a voltage conversion circuit, and a power supply voltage. It is composed of a +3.3 fiber optic module interface circuit, an EEPROM memory, an indicator circuit for indicating data reception and transmission, and a 25MHz vibrating circuit for providing a clock source for the main control chip. 7, according to the claim 2 650nm plastic optical fiber transmission system, characterized in that the main optical repeater, the operating voltage provided by the two optical transceiver module is a fiber optic transceiver module DC I DC converters and AC / DC converter composed ₀ 8. The 650nnl plastic optical fiber transmission system according to claim 7, wherein the optical repeater is mainly composed of a power conversion circuit, a fiber transceiver module power processing circuit, a fiber transceiver module control circuit, and a fiber transceiver module IP ₂ control circuit. The conversion circuit includes a 220V AC voltage converted into a +5V DC voltage circuit, the fiber transceiver module power processing circuit is connected to the +5V DC voltage output circuit, and the optical transceiver module ΙΡι control circuit and the optical transceiver module 3⁄4 control circuit are respectively connected to the corresponding optical fiber transceiver. The output end of the module power processing circuit, the input end and the output end of the fiber transceiver module are respectively connected to the output end and the input end of the optical transceiver module Π» ₂ .  9. The 650 nm plastic optical fiber transmission system according to claim 3, wherein the photoelectric converter comprises a power supply circuit, an optical interface circuit, an electrical interface circuit, two medium conversion control chips DM9331A, a crystal oscillator circuit supplied to the entire system; Connected to the power supply circuit, the crystal oscillator circuit is respectively connected with two medium conversion control chips DM9331A, two medium conversion control chips DM933 1A are connected to each other, and each medium conversion control chip DM9331A is respectively connected with the optical interface circuit and the electrical interface circuit.