CN108011285A - A kind of laser amplifier - Google Patents
A kind of laser amplifier Download PDFInfo
- Publication number
- CN108011285A CN108011285A CN201711472137.7A CN201711472137A CN108011285A CN 108011285 A CN108011285 A CN 108011285A CN 201711472137 A CN201711472137 A CN 201711472137A CN 108011285 A CN108011285 A CN 108011285A
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- CN
- China
- Prior art keywords
- pump light
- laser
- mirror
- lens
- light source
- 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.)
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- 239000013078 crystal Substances 0.000 claims abstract description 36
- 230000008878 coupling Effects 0.000 claims abstract description 25
- 238000010168 coupling process Methods 0.000 claims abstract description 25
- 238000005859 coupling reaction Methods 0.000 claims abstract description 25
- 230000010287 polarization Effects 0.000 claims abstract description 21
- 239000013307 optical fiber Substances 0.000 claims abstract description 13
- 230000011514 reflex Effects 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 229910017502 Nd:YVO4 Inorganic materials 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000009738 saturating Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094042—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a fibre laser
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The present invention relates to a kind of laser amplifier, including two pump light sources, two coupling pump light lens groups, seed light source, half-wave plate, polarizer, Polarization Controller, coupled lens, two deflecting mirrors, laser crystal and total reflective mirror；For the pump light that one of pump light source produces by an optical fiber output to one of coupling pump light lens group, the pump light that another pump light source produces passes through another optical fiber output to another coupling pump light lens group；Two deflecting mirrors include the first deflecting mirror and the second deflecting mirror, and laser crystal forms crystal gain area between the first deflecting mirror and the second deflecting mirror；Two coupling pump light lens are respectively positioned at the first deflecting mirror and the opposite side of the second deflecting mirror；Seed light source, half-wave plate, polarizer, Polarization Controller, coupled lens are set gradually.This laser amplifier can be realized to be amplified twice, and amplify or laser and the optically isolated output of seed, strengthen the applicability of laser amplifier.
Description
Technical field
The present invention relates to field of laser device technology, more particularly to a kind of laser amplifier.
Background technology
Laser amplifier refers to the device that energy (power) amplification of light is carried out using the stimulated radiation of light.By using sharp
Image intensifer, when obtaining high laser energy or power and can keep quality (including pulsewidth, line width, the polarization of laser
Characteristic etc.), the high power laser system being usually used in the important technicals such as controllable nuclear fusion, nuclear blast simulation, super remote laser ranging.So
And current laser amplifier is all only once amplified, laser energy magnification level is limited, is not suitable for requirements at the higher level
Occasion.
The content of the invention
It is an object of the invention to improve the deficiency in the presence of the prior art, there is provided a kind of laser amplifier.
In order to realize foregoing invention purpose, an embodiment of the present invention provides following technical scheme：
A kind of laser amplifier, including two pump light sources, two coupling pump light lens groups, seed light source, half-wave plate,
Polarizer, Polarization Controller, coupled lens, two deflecting mirrors, laser crystal and total reflective mirror；What one of pump light source produced
By an optical fiber output to one of coupling pump light lens group, the pump light that another pump light source produces leads to pump light
Another optical fiber output is crossed to another coupling pump light lens group；Two deflecting mirrors include the first deflecting mirror and the second deflection
Mirror, laser crystal form crystal gain area between the first deflecting mirror and the second deflecting mirror；Two coupling pump light lens groups
Respectively positioned at the first deflecting mirror and the opposite side of the second deflecting mirror；Seed light source, half-wave plate, polarizer, Polarization Controller, coupling
Lens are set gradually；
The seed light that seed light source produces after half-wave plate all by polarizer, through Polarization Controller rotate 45 degree it is defeated
Go out, coupled lens and the first deflecting mirror focus on crystal gain area, and realization is once amplified；Once amplified laser is by the
Two deflecting mirrors reflex to total reflective mirror, then are again introduced into crystal gain area along former road reflection through total reflective mirror, realize secondary amplification；It is secondary
Amplified laser reflexes to coupled lens output by the first deflecting mirror, then rotates 45 degree by Polarization Controller, through polarization
After device reflection, exported along the direction vertical with seed light incident direction.
In a more particular embodiment, Polarization Controller is Faraday rotator or electro-optic crystal.Coupled lens are flat
Flat mirror or planoconvex lens or plano-concave mirror, total reflective mirror are average mirror.Seed light source is optical fiber laser or semiconductor laser or solid
Laser.
In a more particular embodiment, wavelength 808nm or 880nm light source centered on pump light source.Coupling pump light is saturating
Microscope group includes a pair of of planoconvex spotlight or non-spherical lens or cylindrical lens.Laser crystal is Nd：YVO4 bonded crystals or ND:YAG
Bonded crystals or ND:YLF bonded crystals.
Compared with prior art, beneficial effects of the present invention：
The seed light that seed light source produces after half-wave plate all by polarizer, through Polarization Controller rotate 45 degree it is defeated
Go out, coupled lens and the first deflecting mirror focus on crystal gain area, and realization is once amplified；Once amplified laser is by the
Two deflecting mirrors reflex to total reflective mirror, then are again introduced into crystal gain area along former road reflection through total reflective mirror, realize secondary amplification；Pumping
Power density is high, and in total pump power 100w, amplifier small-signal gain can reach 1000x, and extraction efficiency is more than 20%, always
Gain amplifier is 23DB.
Secondary amplified laser reflexes to coupled lens output by the first deflecting mirror, then is rotated by Polarization Controller
45 degree, after polarizer reflects, exported along the direction vertical with seed light incident direction, so as to fulfill seed light and amplify light
Isolation, is independent of each other.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structure diagram of laser amplifier provided in an embodiment of the present invention.
Marked in figure
11-LD drives；12- pump light sources；13- optical fiber；14- the first coupling pump light lens groups；The second deflecting mirrors of 15-；
16- laser crystals；The first deflecting mirrors of 17-；18- total reflective mirrors；19- the second coupling pump light lens groups；20- coupled lens；21- is inclined
Shake controller；22- polarizers；23- half-wave plates.
Embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and designed with a variety of configurations herein.Cause
This, the detailed description of the embodiment of the present invention to providing in the accompanying drawings is not intended to limit claimed invention below
Scope, but it is merely representative of the selected embodiment of the present invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Go out all other embodiments obtained on the premise of creative work, belong to the scope of protection of the invention.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.Meanwhile the present invention's
In description, term " first ", " second " etc. are only used for distinguishing description, and it is not intended that instruction or hint relative importance.
Referring to Fig. 1, a kind of laser amplifier provided in the present embodiment, including 11, two pump light sources 12 of LD drivings,
Two coupling pump light lens groups, seed light source, half-wave plate 23, polarizer 22, Polarization Controller 21, coupled lens 20, two
Deflecting mirror, laser crystal 16 and total reflective mirror 18.Two deflecting mirrors include the first deflecting mirror 17 and the second deflecting mirror 15, laser crystal
16 between the first deflecting mirror 17 and the second deflecting mirror 15, forms crystal gain area.Two coupling pump light lens groups include
First coupling pump light lens group 14 and the second coupling pump light lens group 19, the first coupling pump light lens group 14 and the second pump
Pu optical coupling lens group 19 is respectively positioned at the first deflecting mirror 17 and the opposite side of the second deflecting mirror 15.Seed light source, half-wave plate 23,
Polarizer 22, Polarization Controller 21, coupled lens 20 are set gradually.
Pump light source 12 can be centre wavelength 808nm or 880nm light source, and pump light is produced under LD driving effects.One
The pump light that a pump light source 12 produces is exported to the first coupling pump light lens group 14, another pumping by an optical fiber 13
The pump light that light source 12 produces is exported to the second coupling pump light lens group 19 by another optical fiber 13.Coupling pump light lens
Group can include a pair of of planoconvex spotlight, or non-spherical lens, or cylindrical lens, be as shown in Figure 1 a pair of symmetrically arranged aspheric
Face lens.
Seed light source can be 13 laser of optical fiber, or semiconductor laser, or solid state laser.As shown in Figure 1, seed
The seed light that light source produces, all by polarizer 22, rotates 45 degree of outputs, warp after half-wave plate 23 through Polarization Controller 21
20 and first deflecting mirror 17 of coupled lens focuses on crystal gain area, and realization is once amplified；Once amplified laser is by the
Two deflecting mirrors 15 reflex to total reflective mirror 18, then are again introduced into crystal gain area along the reflection of former road through total reflective mirror 18, realize secondary put
Greatly；Secondary amplified laser reflexes to coupled lens 20 by the first deflecting mirror 17 and exports, then is revolved by Polarization Controller 21
Turn 45 degree, after the reflection of polarizer 22, exported along the direction vertical with seed light incident direction.Output light and seed incident light are inclined
The orientation angle that shakes is in 90 degree, therefore does not enter into seed light incident light source, but reflects 90 degree of direction outputs, so as to fulfill seed light
With the isolation of amplification light.
Polarization Controller 21 can be Faraday rotator or electro-optic crystal, and coupled lens 20 and total reflective mirror 18 can be
Average mirror or planoconvex lens or plano-concave mirror, select according to concrete application demand.Seed light source can be 13 laser of optical fiber or partly lead
Body laser or solid state laser, select according to concrete application demand.Laser crystal 16 can be Nd：YVO4 bonded crystals or
ND:YAG bonded crystals or ND:YLF bonded crystals.
Using above-mentioned laser amplifier, pump power density is high, in total pump power 100w, amplifier small-signal gain
1000x is can reach, extraction efficiency is more than 20%, and total gain amplifier is 23DB.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.
Claims (7)
1. a kind of laser amplifier, it is characterised in that including two pump light sources, two coupling pump light lens groups, seed lights
Source, half-wave plate, polarizer, Polarization Controller, coupled lens, two deflecting mirrors, laser crystal and total reflective mirror；One of pumping
The pump light that light source produces is produced by an optical fiber output to one of coupling pump light lens group, another pump light source
Pump light pass through another optical fiber output to another coupling pump light lens group；Two deflecting mirrors include the first deflecting mirror and
Second deflecting mirror, laser crystal form crystal gain area between the first deflecting mirror and the second deflecting mirror；Two pumping optocouplers
Lens group is closed respectively positioned at the first deflecting mirror and the opposite side of the second deflecting mirror；Seed light source, half-wave plate, polarizer, polarization control
Device processed, coupled lens are set gradually；
The seed light that seed light source produces, all by polarizer, rotates 45 degree of outputs after half-wave plate through Polarization Controller,
Coupled lens and the first deflecting mirror focus on crystal gain area, and realization is once amplified；Once amplified laser passes through second
Deflecting mirror reflexes to total reflective mirror, then is again introduced into crystal gain area along former road reflection through total reflective mirror, realizes secondary amplification；It is secondary to put
Laser after big reflexes to coupled lens output by the first deflecting mirror, then rotates 45 degree by Polarization Controller, through polarizer
After reflection, exported along the direction vertical with seed light incident direction.
2. laser amplifier according to claim 1, it is characterised in that Polarization Controller is Faraday rotator or electric light
Crystal.
3. laser amplifier according to claim 2, it is characterised in that coupled lens are average mirror or planoconvex lens or plano-concave
Mirror, total reflective mirror are average mirror.
4. laser amplifier according to claim 3, it is characterised in that seed light source swashs for optical fiber laser or semiconductor
Light device or solid state laser.
5. laser amplifier according to claim 3, it is characterised in that wavelength 808nm or 880nm centered on pump light source
Light source.
6. laser amplifier according to claim 3, it is characterised in that it is saturating that coupling pump light lens group includes a pair of of plano-convex
Mirror or non-spherical lens or cylindrical lens.
7. laser amplifier according to claim 3, it is characterised in that laser crystal Nd：YVO4 bonded crystals or ND:
YAG bonded crystals or ND:YLF bonded crystals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711472137.7A CN108011285A (en) | 2017-12-29 | 2017-12-29 | A kind of laser amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711472137.7A CN108011285A (en) | 2017-12-29 | 2017-12-29 | A kind of laser amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108011285A true CN108011285A (en) | 2018-05-08 |
Family
ID=62048931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711472137.7A Withdrawn CN108011285A (en) | 2017-12-29 | 2017-12-29 | A kind of laser amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108011285A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108988117A (en) * | 2018-07-25 | 2018-12-11 | 长春理工大学 | A kind of laser amplifier based on polarized combination laser gain |
| CN113809627A (en) * | 2021-11-18 | 2021-12-17 | 北京盛镭科技有限公司 | Laser amplifier |
| CN118299914A (en) * | 2024-04-16 | 2024-07-05 | 北京云汉星驰激光技术有限公司 | Device and method for expanding ultrafast laser gain bandwidth |
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|---|---|---|---|---|
| CN101981769A (en) * | 2008-03-31 | 2011-02-23 | 伊雷克托科学工业股份有限公司 | Multi-pass optical power amplifier |
| CN103022888A (en) * | 2012-12-21 | 2013-04-03 | 中国科学院长春光学精密机械与物理研究所 | Alkali metal steam laser of polarized optical pumping |
| CN103346472A (en) * | 2013-07-01 | 2013-10-09 | 浙江大学 | 100MHz high repetition frequency, 1ns narrow pulse width narrow line width laser mixing amplifying device and method |
| CN104752942A (en) * | 2014-04-04 | 2015-07-01 | 深圳英诺激光科技有限公司 | Multi-pass amplifying optical fiber amplifier |
| CN105140773A (en) * | 2014-05-30 | 2015-12-09 | 李激光公司 | External diffusion amplifier |
| CN207664436U (en) * | 2017-12-29 | 2018-07-27 | 成都心无界光电技术有限公司 | A kind of laser amplifier |
-
2017
- 2017-12-29 CN CN201711472137.7A patent/CN108011285A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101981769A (en) * | 2008-03-31 | 2011-02-23 | 伊雷克托科学工业股份有限公司 | Multi-pass optical power amplifier |
| CN103022888A (en) * | 2012-12-21 | 2013-04-03 | 中国科学院长春光学精密机械与物理研究所 | Alkali metal steam laser of polarized optical pumping |
| CN103346472A (en) * | 2013-07-01 | 2013-10-09 | 浙江大学 | 100MHz high repetition frequency, 1ns narrow pulse width narrow line width laser mixing amplifying device and method |
| CN104752942A (en) * | 2014-04-04 | 2015-07-01 | 深圳英诺激光科技有限公司 | Multi-pass amplifying optical fiber amplifier |
| CN105140773A (en) * | 2014-05-30 | 2015-12-09 | 李激光公司 | External diffusion amplifier |
| CN207664436U (en) * | 2017-12-29 | 2018-07-27 | 成都心无界光电技术有限公司 | A kind of laser amplifier |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108988117A (en) * | 2018-07-25 | 2018-12-11 | 长春理工大学 | A kind of laser amplifier based on polarized combination laser gain |
| CN113809627A (en) * | 2021-11-18 | 2021-12-17 | 北京盛镭科技有限公司 | Laser amplifier |
| CN113809627B (en) * | 2021-11-18 | 2022-03-01 | 北京盛镭科技有限公司 | Laser amplifier |
| CN118299914A (en) * | 2024-04-16 | 2024-07-05 | 北京云汉星驰激光技术有限公司 | Device and method for expanding ultrafast laser gain bandwidth |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180508 |
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