WO1996008857B1 - A low noise photon coupled circuit - Google Patents
A low noise photon coupled circuitInfo
- Publication number
- WO1996008857B1 WO1996008857B1 PCT/AU1995/000599 AU9500599W WO9608857B1 WO 1996008857 B1 WO1996008857 B1 WO 1996008857B1 AU 9500599 W AU9500599 W AU 9500599W WO 9608857 B1 WO9608857 B1 WO 9608857B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- coupled circuit
- photon coupled
- light emitter
- light detector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Abstract
A photon coupled circuit comprises a high quantum efficiency semiconductor light emitter (TDA) coupled with high quantum efficiency with a semiconductor light detector (OLD). Bias current is provided to both the light detector (OLD) and light emitter (TDA). The light output of the light emitter (TDA) is modulated by the current flowing therein and the current flowing (io) in the detector (OLD) is modulated by the light received from the light emitter (TDA). The quantum transfer efficiency or current gain in greater that 0.5 and a portion of the current flowing in the light detector (OLD) is applied as feedback to reinforce or oppose the curent flowing in the light emitter (TDA).
Claims
1. A low noise photon coupled circuit comprising a high quantum efficiency semiconductor light emitter, means to provide a bias current to said light emitter, the light output of said light emitter being modulated by the current flowing therein; a semiconductor light detector optically coupled with high quantum efficiency with said light emitter; means to provide a bias current to said light detector, the current flowing in said light detector being modulated by the light received from said light emitter, the quantum transfer efficiency of said circuit being greater than 0.5, and means to apply a feedback portion of the current flowing in said light detector to reinforce the current flowing in the light emitter.
2. A photon coupled circuit as claimed in claim 1 wherein said feedback is positive to reinforce the current flowing in the light emitter and provide increased gain.
3. A photon coupled circuit as claimed in claims 1 and 2 wherein said light emitter comprises an array of semiconductor light emitters.
4. A photon coupled circuit as claimed in claim 3 wherein said array comprises a plurality of laser diodes or light emitting diodes connected in series, and modulated by a common current modulator.
5. A photon coupled circuit as claimed in claim 3 or claim 4 wherein the product of the number of elements in the array and the value of the quantum coupling efficiency between each element and the light detector is much greater than 1.
6. A photon coupled circuit as claimed in claims 1 and 2 wherein said light emitter is a single semiconductor device and said light detector is a single semiconductor device.
7. A photon coupled circuit as claimed in claim 6, wherein said semiconductor device comprising the light emitter is a single light emitting diode or laser diode.
8. A photon coupled circuit as claimed in any one of claims 1 to 7 wherein the light detector comprises a photodiode.
9. A photon coupled circuit as claimed in any one of claims 1 to 8 wherein the high quantum efficiency coupling of said light emitter with said light detector is achieved by close physical positioning.
10. A photon coupled circuit as claimed in any one of claims 1 to 8, wherein the high quantum efficiency coupling of said light emitter with said light detector is achieved via an optical waveguide or high efficiency light pipe.
11. A photon coupled circuit as claimed in claim 9 or claim 10 wherein said circuit is in the form of an optoelectronic integrated circuit.
12. A photon coupled circuit as claimed in any one of claims 1 to 11 wherein the quantum transfer efficiency of said coupling is at least 75%.
13. A photon coupled circuit as claimed in any one of claims 1 to 12 further comprising a second semiconductor light detector, the output current of said second light detector modulating the current flowing in said light emitter.
14. A photon coupled circuit as claimed in any one of claims 1 to 12 wherein said light detector is adapted to receive an input light signal from an external source and the current flowing in the light detector is modulated by the input light signal.
15. A photon coupled circuit as claimed in claim 14 further comprising a light output device driven by the amplified current from said light detector.
16. A photon coupled circuit as claimed in claim 15 wherein said light output device comprises one or more laser diodes or light emitting diodes.
17. A photon coupled circuit substantially, as described with reference to Figures 1 to 7, Figure 8 or Figure 9 of the accompanying drawings.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8509760A JPH10505201A (en) | 1994-09-14 | 1995-09-14 | Low noise photon coupling circuit |
| AU35144/95A AU682982B2 (en) | 1994-09-14 | 1995-09-14 | A low noise photon coupled circuit |
| US08/809,079 US5834763A (en) | 1994-09-14 | 1995-09-14 | Low noise photon coupled circuit |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPM8120A AUPM812094A0 (en) | 1994-09-14 | 1994-09-14 | Optoelectronic feedback system |
| AUPM8120 | 1994-09-14 | ||
| AUPM9986 | 1994-12-12 | ||
| AUPM9986A AUPM998694A0 (en) | 1994-12-12 | 1994-12-12 | Optocoupler feedback |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1996008857A1 WO1996008857A1 (en) | 1996-03-21 |
| WO1996008857B1 true WO1996008857B1 (en) | 1996-04-18 |
Family
ID=25644769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/AU1995/000599 Ceased WO1996008857A1 (en) | 1994-09-14 | 1995-09-14 | A low noise photon coupled circuit |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5834763A (en) |
| JP (1) | JPH10505201A (en) |
| WO (1) | WO1996008857A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9713365D0 (en) | 1997-06-25 | 1997-08-27 | Secr Defence | A laser device and transistor |
| FR2801742B1 (en) * | 1999-11-26 | 2002-05-03 | Centre Nat Rech Scient | HIGH VOLTAGE HYBRID CIRCUIT |
| GB202003507D0 (en) * | 2020-03-11 | 2020-04-29 | Spencer Peter | Opto-electronic assemblies |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0244951B1 (en) * | 1986-04-04 | 1994-02-02 | Materials Research Corporation | Method and apparatus for handling and processing wafer like materials |
| JPH06103765B2 (en) * | 1987-10-30 | 1994-12-14 | 日本電気株式会社 | Semiconductor laser bias current control method |
| JPH0231420A (en) * | 1988-05-20 | 1990-02-01 | Tegal Corp | Wafer clamper for plasma reactor |
-
1995
- 1995-09-14 JP JP8509760A patent/JPH10505201A/en active Pending
- 1995-09-14 US US08/809,079 patent/US5834763A/en not_active Expired - Fee Related
- 1995-09-14 WO PCT/AU1995/000599 patent/WO1996008857A1/en not_active Ceased
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