CN102545009A - Device capable of eliminating thermal depolarization effect in laser amplifier - Google Patents
Device capable of eliminating thermal depolarization effect in laser amplifier Download PDFInfo
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- CN102545009A CN102545009A CN2011102448184A CN201110244818A CN102545009A CN 102545009 A CN102545009 A CN 102545009A CN 2011102448184 A CN2011102448184 A CN 2011102448184A CN 201110244818 A CN201110244818 A CN 201110244818A CN 102545009 A CN102545009 A CN 102545009A
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Abstract
The invention discloses a device capable of eliminating a thermal depolarization effect in a laser amplifier. The device comprises a first optical rotator, the laser amplifier, a second optical rotator and a reflecting mirror, which are linearly arranged in sequence, wherein when laser light passes through the first optical rotator and the second optical rotator, the polarization direction of the laser light can be deflected clockwise or anticlockwise for 45 DEG; and the laser light enters the first optical rotator, sequentially passes through the laser amplifier and the second optical rotator, is reflected by the reflecting mirror, passes through the second optical rotator and the laser amplifier again, and finally exits from the first optical rotator relative to the incidence direction. By adoption of the device capable of eliminating the thermal depolarization effect in the laser amplifier, the polarization state of the laser light which enters and exits from the device can keep unchanged, and the thermal depolarization phenomenon of the device can be eliminated, so that the efficiency of a laser is greatly improved.
Description
Technical field
The present invention relates to eliminate the device of hot fevering sodium effect, particularly a kind of device of eliminating hot fevering sodium effect in the laser multipass amplifier.
Background technology
In the laser operation process; The pumping energy major part all changes into and dissipates the heat in the laser crystal; Reasons such as the inhomogeneous and hot transmission of pumping have caused the inhomogeneous of crystals Temperature Distribution; Form thermal stress, cause the skewness of crystal refractive index, make isotropic laser medium become anisotropy.Laser will distort before the laser wave during through anisotropic index medium, and linearly polarized light will produce hot fevering sodium effect after inciding the laser medium of stress birfringence.Hot fevering sodium effect greatly influences the efficient of laser.
Therefore, how to eliminate the difficult problem that hot fevering sodium effect in the laser amplifier just becomes the laser development.
Summary of the invention
The technical problem that the present invention solves provides a kind of device of eliminating hot fevering sodium effect in the laser amplifier.
A kind of device of eliminating hot fevering sodium effect in the laser amplifier is provided; Comprise first polarization apparatus, laser amplifier, second polarization apparatus and the speculum that are provided with according to linear sequence; Said first polarization apparatus and second polarization apparatus can make the polarization direction of the laser of process produce 45 clockwise or counterclockwise degree deflections; Laser is from the first polarization apparatus incident; Successively through the mirroring that is reflected behind the laser amplifier, second polarization apparatus, and once more through second polarization apparatus, laser amplifier, finally with respect to incident direction from the first polarization apparatus outgoing.
According to a preferred embodiment of the invention, said first polarization apparatus and said second polarization apparatus are counterclockwise polarization apparatus.
According to a preferred embodiment of the invention, said first polarization apparatus and said second polarization apparatus are clockwise optically-active device.
According to a preferred embodiment of the invention, said first polarization apparatus is clockwise optically-active device, and said second polarization apparatus is counterclockwise polarization apparatus.
According to a preferred embodiment of the invention, said first polarization apparatus is counterclockwise polarization apparatus, and said second polarization apparatus is clockwise optically-active device.
According to a preferred embodiment of the invention, said first polarization apparatus and/or said second polarization apparatus are Faraday polarization apparatus.
According to a preferred embodiment of the invention, said speculum is a total reflective mirror.
According to a preferred embodiment of the invention, said laser amplifier is a laser multipass amplifier.
Compared to prior art; The device utilization of hot fevering sodium effect is provided with according to linear sequence in the elimination laser amplifier provided by the invention first polarization apparatus, laser amplifier, second polarization apparatus and speculum; Adjustment is revised in polarization direction to laser; Keep polarization direction consistent after laser incident and the outgoing, can eliminate the hot fevering sodium effect of working media in the laser amplifier effectively, and then improve the work quality of laser accordingly.
Description of drawings
Fig. 1 is a kind of structural representation of eliminating the device of hot fevering sodium effect in the laser amplifier that first embodiment of the invention provides.
Fig. 2 is the sketch map that laser polarization state changes in the device busy process of hot fevering sodium effect in the elimination laser amplifier shown in Figure 1.
Fig. 3 is a kind of apparatus structure sketch map of eliminating hot fevering sodium effect in the laser amplifier that second embodiment of the invention provides.
Fig. 4 is the sketch map that laser polarization state changes in the device busy process of hot fevering sodium effect in the elimination laser amplifier shown in Figure 3.
Embodiment
To combine accompanying drawing and embodiment that the present invention is described further below.
See also Fig. 1, Fig. 1 is a kind of structural representation of eliminating the device 100 of hot fevering sodium effect in the laser amplifier that first embodiment of the invention provides.The device 100 of eliminating hot fevering sodium effect in the laser amplifier comprises first polarization apparatus 11, laser amplifier 12, second polarization apparatus 13 and the speculum 14 that is provided with according to linear sequence.
Speculum 14 is a total reflective mirror, is used to make the laser generation total reflection of incident, reduces the energy loss of laser in light path.
The operation principle of eliminating the device 100 of hot fevering sodium effect in the laser amplifier is described below:
Please consult Fig. 2 simultaneously, Fig. 2 is the device 100 of eliminating hot fevering sodium effect in the laser amplifier sketch map that changes of laser polarization state in the course of the work.It is that example is specifically introduced that present embodiment is counterclockwise Faraday polarization apparatus with first polarization apparatus 11 and second polarization apparatus 13.
Laser 101 gets into the device 100 of eliminating hot fevering sodium effect the laser amplifier with first polarization direction 1 from first polarization apparatus 11; Behind first polarization apparatus 11; The polarization direction of laser 101 is rotated counterclockwise 45 degree to the polarization direction 2; And, carry out power amplification and directive second polarization apparatus 13 through laser amplifier 12 with polarization direction 2 entering laser amplifiers 12; The laser 101 of power amplification through second polarization apparatus 13 after, its polarization direction is rotated counterclockwise 45 degree once more, to the polarization direction 3, and with polarization direction 3 toward mirror 14; The laser 101 that incides speculum 14 directive second polarization apparatus 13 once more that is reflected after mirror 14 reflections; Behind the polarization through second polarization apparatus 13, the polarization direction of laser 101 is rotated counterclockwise 45 degree for the third time, to the polarization direction 4, and gets into laser amplifier 12 for the second time with polarization direction 4 and carries out power amplification; Directive first polarization apparatus 11 once more of the laser 101 after the power amplification for the second time, through after the optically-active, its polarization direction is rotated counterclockwise 45 degree for the 4th time, to the polarization direction 5.Final laser 101 penetrates with the device 100 of polarization direction 5 hot fevering sodium effect from eliminate laser amplifier.
Can find out that by Fig. 2 polarization direction 5 is corresponding to polarization direction with polarization direction 1, thus, behind the device 100 of laser 101 through hot fevering sodium effect in the elimination laser amplifier, can keep original polarization direction effectively.
It is understandable that; Laser 101 is the polarization direction 2 and polarization direction 4 quadratures of the second time from 13 outgoing of second polarization apparatus of directive second polarization apparatus 13 for the first time; Thus; The laser beam of cross-polarization radially compensates the heat that working media produces in the laser amplifier with tangential polarisation component through exchange and moves back partially; And then can make get into and the said elimination laser amplifier of outgoing in the polarization state of laser beam of device 100 of hot fevering sodium effect remain unchanged, eliminate in the laser amplifier heat of working media effectively and move back inclined to one side phenomenon.
It is understandable that; When first polarization apparatus 11 and second polarization apparatus 12 are clockwise Faraday polarization apparatus; Device 100 operation principles of hot fevering sodium effect are similar in the elimination laser amplifier of its operation principle and first execution mode; The polarization direction of laser will change according to the clockwise direction opposite with variation shown in Figure 2, repeats no more at this.
See also Fig. 3, Fig. 3 is a kind of apparatus structure sketch map of eliminating hot fevering sodium effect in the laser amplifier of second embodiment of the invention.The device 200 of eliminating hot fevering sodium effect in the laser amplifier is similar with the apparatus structure of hot fevering sodium effect in the elimination laser amplifier of first execution mode, comprises first polarization apparatus 21, laser amplifier 22, second polarization apparatus 23 and speculum 24 according to the linear sequence setting.
First polarization apparatus 21 and second polarization apparatus 23 are Faraday polarization apparatus, and Faraday polarization apparatus can be with the polarization polarization state of light of passing through according to clockwise or 45 degree of deflection counterclockwise.Special, the reverse each other Faraday polarization apparatus of first polarization apparatus 21 in second execution mode and second polarization apparatus 23, that is, first polarization apparatus 21 in second execution mode is clockwise Faraday polarization apparatus, second polarization apparatus 23 is counterclockwise Faraday polarization apparatus; Perhaps first polarization apparatus 21 is counterclockwise Faraday polarization apparatus, and second polarization apparatus 23 is clockwise Faraday polarization apparatus.
Laser amplifier 22 is used to improve the power or the energy of laser beam, to obtain the laser beam output (output) of higher-energy (high-energy).
Speculum 24 is a total reflective mirror, is used to make the laser generation total reflection of incident.
The operation principle of eliminating the device 200 of hot fevering sodium effect in the laser amplifier is described below:
Please consult Fig. 4 simultaneously; Fig. 4 for the device 100 of eliminating hot fevering sodium effect in the laser amplifier in the course of the work; Laser polarization state changes sketch map; Present embodiment is counterclockwise Faraday polarization apparatus with first polarization apparatus 21, and second polarization apparatus 23 is that example is specifically introduced for clockwise Faraday polarization apparatus.
Laser 201 gets into the device 200 of eliminating hot fevering sodium effect the laser amplifier with first polarization direction 1 from first polarization apparatus 21; Behind first polarization apparatus 21; The polarization direction of laser 201 is rotated counterclockwise 45 degree to the polarization direction 2; And keep polarization direction 2 to get into laser amplifier 22, carry out power amplification and directive second polarization apparatus 23 through laser amplifier 22; The laser 201 of power amplification through second polarization apparatus 23 after, its polarization direction turn clockwise 45 the degree, 3 (the overlapping) to the polarization direction with polarization direction 1; And with polarization direction 3 toward mirror 24; The laser 201 that incides speculum 24 is reflected after mirror 24 reflections once more behind directive second polarization apparatus 23; Laser 201 through second polarization apparatus 23 after; Its polarization direction the 45 degree that turn clockwise once more are to the polarization direction 4 and get into laser amplifier 22 for the second time with polarization direction 4 and carry out power amplification; Directive first polarization apparatus 21 once more of the laser 201 after the power amplification for the second time, through after the optically-active, its polarization direction is rotated counterclockwise 45 degree once more, to the polarization direction 5.Final laser 201 penetrates with the device 200 of polarization direction 5 hot fevering sodium effect from eliminate laser amplifier.Can find out that by Fig. 4 polarization direction 5 is consistent polarization direction with polarization direction 1, thus, behind the device 200 of laser 201 through hot fevering sodium effect in the elimination laser amplifier, can keep original polarization direction effectively.
It is understandable that; Laser 201 is the polarization direction 2 and polarization direction 4 quadratures of the second time from 23 outgoing of second polarization apparatus of directive second polarization apparatus 23 for the first time; Thus; The laser beam of cross-polarization radially compensates the heat that working media produces in the laser amplifier with tangential polarisation component through exchange and moves back partially; And then can make get into and the said elimination laser amplifier of outgoing in the polarization state of laser beam of device 200 of hot fevering sodium effect remain unchanged, eliminate in the laser amplifier heat of working media effectively and move back inclined to one side phenomenon.
Further; When first polarization apparatus 21 is clockwise Faraday polarization apparatus; When second polarization apparatus 23 is counterclockwise Faraday polarization apparatus; Device 200 operation principles of hot fevering sodium effect are similar in the elimination laser amplifier of its operation principle and second execution mode, and the polarization direction of laser will change according to the Changing Pattern opposite with variation shown in Figure 4, repeats no more at this.
In the above-described embodiments, only the present invention has been carried out exemplary description, but those skilled in the art can carry out various modifications to the present invention after reading present patent application under the situation that does not break away from the spirit and scope of the present invention.
Claims (8)
1. device of eliminating hot fevering sodium effect in the laser amplifier; It is characterized in that; Comprise first polarization apparatus, laser amplifier, second polarization apparatus and the speculum that are provided with according to linear sequence; Said first polarization apparatus and second polarization apparatus can make the polarization direction of the laser of process produce 45 clockwise or counterclockwise degree deflections, and laser is from the first polarization apparatus incident, successively through the mirroring that is reflected behind laser amplifier, second polarization apparatus; And once more through second polarization apparatus, laser amplifier, finally with respect to incident direction from the first polarization apparatus outgoing.
2. the device of hot fevering sodium effect is characterized in that in the elimination laser amplifier as claimed in claim 1, and said first polarization apparatus and said second polarization apparatus are counterclockwise polarization apparatus.
3. the device of hot fevering sodium effect is characterized in that in the elimination laser amplifier as claimed in claim 1, and said first polarization apparatus and said second polarization apparatus are clockwise optically-active device.
4. the device of hot fevering sodium effect is characterized in that in the elimination laser amplifier as claimed in claim 1, and said first polarization apparatus is clockwise optically-active device, and said second polarization apparatus is counterclockwise polarization apparatus.
5. the device of hot fevering sodium effect is characterized in that in the elimination laser amplifier as claimed in claim 1, and said first polarization apparatus is counterclockwise polarization apparatus, and said second polarization apparatus is clockwise optically-active device.
6. the device of hot fevering sodium effect is characterized in that in the elimination laser amplifier as claimed in claim 1, and said first polarization apparatus and/or said second polarization apparatus are Faraday polarization apparatus.
7. the device of hot fevering sodium effect is characterized in that in the elimination laser amplifier as claimed in claim 1, and said speculum is a total reflective mirror.
8. the device of hot fevering sodium effect is characterized in that in the elimination laser amplifier as claimed in claim 1, and said laser amplifier is a laser multipass amplifier.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102448184A CN102545009A (en) | 2011-08-25 | 2011-08-25 | Device capable of eliminating thermal depolarization effect in laser amplifier |
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| CN2011102448184A CN102545009A (en) | 2011-08-25 | 2011-08-25 | Device capable of eliminating thermal depolarization effect in laser amplifier |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364773A (en) * | 2013-07-16 | 2013-10-23 | 西安电子科技大学 | Laser target depolarization parameter line test system |
| CN104820295A (en) * | 2014-01-30 | 2015-08-05 | 奥普林克通信公司 | Athermal Faraday rotator mirror |
| CN105140772A (en) * | 2015-09-30 | 2015-12-09 | 中国科学院合肥物质科学研究院 | Electro-optic Q-switch capable of completely compensating for laser thermal depolarization |
| CN108415175A (en) * | 2017-02-10 | 2018-08-17 | 北京齐瑞德光电科技有限公司 | A kind of scrambler based on Faraday effect |
| CN110998997A (en) * | 2017-05-24 | 2020-04-10 | 英国研究与创新组织 | Laser amplifier module |
Citations (5)
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| JPS60198880A (en) * | 1984-03-23 | 1985-10-08 | Fujitsu Ltd | Laser device |
| US5448579A (en) * | 1993-12-09 | 1995-09-05 | Hewlett-Packard Company | Polarization independent picosecond fiber laser |
| US6384966B1 (en) * | 1999-11-03 | 2002-05-07 | Time-Bandwidth Products Ag | Multiple pass optical amplifier with thermal birefringence compensation |
| 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 |
| CN102035126A (en) * | 2010-11-10 | 2011-04-27 | 中国科学院力学研究所 | All-solid-state laser for laser texturing of metal |
-
2011
- 2011-08-25 CN CN2011102448184A patent/CN102545009A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60198880A (en) * | 1984-03-23 | 1985-10-08 | Fujitsu Ltd | Laser device |
| US5448579A (en) * | 1993-12-09 | 1995-09-05 | Hewlett-Packard Company | Polarization independent picosecond fiber laser |
| US6384966B1 (en) * | 1999-11-03 | 2002-05-07 | Time-Bandwidth Products Ag | Multiple pass optical amplifier with thermal birefringence compensation |
| 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 |
| CN102035126A (en) * | 2010-11-10 | 2011-04-27 | 中国科学院力学研究所 | All-solid-state laser for laser texturing of metal |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364773A (en) * | 2013-07-16 | 2013-10-23 | 西安电子科技大学 | Laser target depolarization parameter line test system |
| CN104820295A (en) * | 2014-01-30 | 2015-08-05 | 奥普林克通信公司 | Athermal Faraday rotator mirror |
| CN104820295B (en) * | 2014-01-30 | 2020-04-28 | 奥普林克通信公司 | Athermal Faraday rotator mirror |
| CN105140772A (en) * | 2015-09-30 | 2015-12-09 | 中国科学院合肥物质科学研究院 | Electro-optic Q-switch capable of completely compensating for laser thermal depolarization |
| CN105140772B (en) * | 2015-09-30 | 2018-05-15 | 中国科学院合肥物质科学研究院 | A kind of electro-optical Q-switch that laser heat depolarization is fully compensated |
| CN108415175A (en) * | 2017-02-10 | 2018-08-17 | 北京齐瑞德光电科技有限公司 | A kind of scrambler based on Faraday effect |
| CN110998997A (en) * | 2017-05-24 | 2020-04-10 | 英国研究与创新组织 | Laser amplifier module |
| CN110998997B (en) * | 2017-05-24 | 2021-12-17 | 英国研究与创新组织 | Laser amplifier module |
| US11329448B2 (en) | 2017-05-24 | 2022-05-10 | United Kingdom Research And Innovation | Laser amplifier module |
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Application publication date: 20120704 |