CN100399180C - Amplitude modulation effect compensating apparatus - Google Patents
Amplitude modulation effect compensating apparatus Download PDFInfo
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- CN100399180C CN100399180C CNB2006100239588A CN200610023958A CN100399180C CN 100399180 C CN100399180 C CN 100399180C CN B2006100239588 A CNB2006100239588 A CN B2006100239588A CN 200610023958 A CN200610023958 A CN 200610023958A CN 100399180 C CN100399180 C CN 100399180C
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- beam splitter
- isolator
- interferometer
- amplitude modulation
- collimator
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Abstract
The present invention relates to an amplitude modulation effect compensating device which is used for high power laser systems for solving laser pulse waveform peak oscillation structures. The present invention is composed of a first isolator, a first beam splitter, a first collimator, an F-P interferometer, a second collimator, a second beam splitter, a second isolator and a filter, wherein the first isolator, the first beam splitter and the first collimator are orderly arranged on a light path and are connected by an optical fiber; the second collimator, the second beam splitter, the second isolator and the filter are connected by an optical fiber; the F-P interferometer is provided with a piezoelectric ceramics and micrometer head adjusting mechanism for realizing the fine adjustment of the F-P interferometer; the main port of the first beam splitter is connected with the first collimator; the main port of the second beam splitter is connected with the second isolator; the first beam splitter and the second beam splitter are respectively provided with a monitoring port used for being connected with corresponding monitors. The present invention has the characteristics of convenient adjustment, flexible control and good stability and repeatability.
Description
Technical field
The present invention relates to high power laser system, particularly a kind of amplitude modulation effect compensating apparatus that is used for high power laser system solution laser pulse shape spike oscillating structure compensates the amplitude modulation effect in the high power laser system with realization.
Background technology
Being in the high power laser system of representative with inertial confinement fusion drive unit (ICF), need carry out video stretching to the narrow-linewidth laser pulse, it is back to stimulated Brillouin scattering that the homogeneity of raising spectrum and inhibition are harmful to.But amplification and the transmission of wide range light in system can produce amplitude modulation effect (FM-AM effect), cause pulse waveform the spike oscillating structure to occur, high peak power can damage device, the safe operation energy of reduction system needs a kind of effective compensation system to eliminate this effect.The non-homogeneous transmission of each frequency spectrum of wide range laser in system that have its source in of amplitude modulation effect, typical factor comprises: 1. laser amplifier gain live width is narrow, and the gain that causes each frequency spectrum to obtain is inconsistent; 2. the polarization mode dispersion effect (PMD) in the polarization maintaining optical fibre causes the decay of each frequency spectrum inconsistent.
Summary of the invention
The objective of the invention is that laser pulse shape produces the spike oscillating structure in the wide spectrum Laser Transmission process in order to solve in the high power laser system, it is the problem of amplitude modulation effect, a kind of amplitude modulation effect compensating apparatus is provided, require this device have easy to adjust, control flexibly, stability and the good characteristics of repeatability.
Technical solution of the present invention is as follows:
A kind of amplitude modulation effect compensating apparatus that is used for high power laser system solution laser pulse shape spike oscillating structure, it is by first isolator by the optical fiber connection that sets gradually on the light path, first beam splitter and first collimating apparatus, Fabry-Perot interferometer (hereinafter to be referred as the F-P interferometer), second collimating apparatus by the optical fiber connection, second beam splitter, second isolator and wave filter constitute, described F-P interferometer has a piezoelectric ceramics and micrometer head governor motion, to realize the meticulous adjusting of F-P interferometer, the master port of described first beam splitter connects first collimating apparatus, the master port of described second beam splitter inserts second isolator, and described first beam splitter respectively has a monitor port for being connected corresponding monitor with second beam splitter.
Described beam splitter is the 10:1 beam splitter.Described piezoelectric ceramics and micrometer head governor motion are commercially available.
The F-P interferometer is used very extensive, and it has high spectral resolving power, and mainly the reflecting surface by two parallel placements constitutes, and two reflectings surface all adopt high reflectance in general the application, are used to study the hyperfine structure of spectrum.But the present invention then is a meticulous spectral filtering characteristic of utilizing the F-P interferometer, to having different decay through each frequency spectrum after the non-homogeneous transmission of system, obtain bigger decay through the frequency spectrum that gain is big behind the F-P interferometer again, as shown in Figure 1, make the heterogeneity of each frequency spectrum improve, can effectively suppress amplitude modulation effect.
Through probationary certificate, that apparatus of the present invention have is easy to adjust, control flexibly, stability and the good characteristics of repeatability.
Description of drawings
Fig. 1 is a principle of work synoptic diagram of the present invention
Fig. 2 is the structural representation of amplitude modulation effect compensating apparatus of the present invention.
Embodiment
Please consult Fig. 2 earlier, Fig. 2 is the structural representation of amplitude modulation effect compensating apparatus of the present invention.As seen from the figure, the compensation system of amplitude modulation effect of the present invention is by first isolator 1 by the optical fiber connection that sets gradually on the light path, first beam splitter 2 and first collimating apparatus 3, F-P interferometer 4, second collimating apparatus 6 by the optical fiber connection, second beam splitter 7, second isolator 8 and wave filter 9 constitute, described F-P interferometer 4 has a piezoelectric ceramics and micrometer head governor motion 5, to realize the meticulous adjusting of F-P interferometer 4, the master port of described first beam splitter 2 connects first collimating apparatus 3, the master port of described second beam splitter 7 inserts second isolator 8, and described first beam splitter 2 respectively has a monitor port for being connected corresponding monitor with second beam splitter 7.
Described beam splitter is the 10:1 beam splitter.
Principle of work of the present invention is as follows: the pulse laser behind the video stretching connects access to plant by optical fiber, at first through first isolator 1, realize the isolation of apparatus of the present invention and prime laser aid, prevent that the fiber end face of prime laser aid and the reflecting surface of F-P interferometer 4 from forming the cavity oscillation effect, the output terminal of first isolator 1 inserts the inlet of first beam splitter 2, the monitor port of first beam splitter 2 is used for the reflecting surface of minute adjustment F-P interferometer 4 and the verticality of spatial beam, the master port of first beam splitter 2 converts spatial light to after first collimating apparatus 3, this spatial light is carried out the Filtering Processing that becomes more meticulous of frequency spectrum by F-P interferometer 4, the tuning of F-P interferometer 4 realized by piezoelectric ceramics and micrometer head 5, wherein micrometer head is realized the coarse tuning of the micron dimension of distance between F-P interferometer two flat boards, the main control that realizes F-P interferometer 4 spectral filtering bandwidth, and piezoelectric ceramics is realized the fine tune of the nanometer scale of distance between 4 liang of flat boards of F-P interferometer, aiming at of the main transmission spectrum center of curve frequency spectrum of realizing F-P interferometer spectral filtering center spectrum and system, referring to Fig. 1, realize that transmission curve and frequency after the compensation are irrelevant substantially, promptly be a horizontal line substantially; Finish spatial light after the frequency spectrum processing through second collimating apparatus, 6 coupled into optical fibres, insert second beam splitter 7, the supervision mouth of second beam splitter 7 is used to monitor the filtering characteristic of F-P interferometer 4, the master port of second beam splitter 7 inserts second isolator 8, second isolator 8 is realized the isolation of apparatus of the present invention and back level laser system, prevent that the fiber end face of back level and the reflecting surface of F-P interferometer 4 from forming the cavity oscillation effect, wave filter 9 is received in the output of second isolator 8, and output at last offers the back level system.
Because device will be realized hyperfine filtering, relatively more responsive to mechanical stability and external shock, each parts of device must be fastening in the practical application, places then on the optical table of shock insulation.Realize the piezoelectric ceramics and the well behaved product of the necessary selection of micrometer head part of interferometer dynamic tuning, the mechanical connection between piezoelectric ceramics, micrometer head, the interferometer reflection face three also must guarantee to have good stability.
Claims (2)
1. one kind is used for the amplitude modulation effect compensating apparatus that high power laser system solves laser pulse shape spike oscillating structure, it is characterized in that it is by first isolator (1) by the optical fiber connection that sets gradually on the light path, first beam splitter (2) and first collimating apparatus (3), F-P interferometer (4), second collimating apparatus (6) by the optical fiber connection, second beam splitter (7), second isolator (8) and wave filter (9) constitute, described F-P interferometer (4) has a piezoelectric ceramics and micrometer head governor motion (5), to realize the adjusting of F-P interferometer (4), the master port of described first beam splitter (2) connects first collimating apparatus (3), the master port of described second beam splitter (7) inserts second isolator (8), and described first beam splitter (2) respectively has a monitor port for being connected corresponding monitor with second beam splitter (7).
2. amplitude modulation effect compensating apparatus according to claim 1 is characterized in that described beam splitter is 10: 1 beam splitters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100239588A CN100399180C (en) | 2006-02-17 | 2006-02-17 | Amplitude modulation effect compensating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100239588A CN100399180C (en) | 2006-02-17 | 2006-02-17 | Amplitude modulation effect compensating apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1844993A CN1844993A (en) | 2006-10-11 |
| CN100399180C true CN100399180C (en) | 2008-07-02 |
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| CNB2006100239588A Expired - Fee Related CN100399180C (en) | 2006-02-17 | 2006-02-17 | Amplitude modulation effect compensating apparatus |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100494876C (en) * | 2007-01-24 | 2009-06-03 | 中国科学院上海光学精密机械研究所 | On-line monitoring system for interpole distance of adjustable F-P interferometer |
| CN103995393A (en) * | 2014-05-22 | 2014-08-20 | 中国科学院上海光学精密机械研究所 | Laser spectrum compensation device |
| CN104155751A (en) * | 2014-07-18 | 2014-11-19 | 奉化市宇创产品设计有限公司 | Piezoelectric ceramic light modulator |
| CN105356938B (en) * | 2015-12-07 | 2017-09-12 | 中国科学院上海光学精密机械研究所 | The detection means of amplitude-frequency modulated signal |
Citations (9)
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| US4198115A (en) * | 1978-08-16 | 1980-04-15 | Bell Telephone Laboratories, Incorporated | Fabry-Perot resonator using a birefringent crystal |
| EP0357475A1 (en) * | 1988-07-19 | 1990-03-07 | France Telecom | Electro-optical measuring system for the frequency analysis of very wide band signals |
| US5303079A (en) * | 1992-04-09 | 1994-04-12 | At&T Bell Laboratories | Tunable chirp, lightwave modulator for dispersion compensation |
| EP1037096A2 (en) * | 1999-03-13 | 2000-09-20 | PIRELLI CAVI E SISTEMI S.p.A. | Directional coupler and mach-zehnder modulator using such coupler |
| US6175667B1 (en) * | 1998-09-22 | 2001-01-16 | Nz Applied Technologies Corporation | High-speed polarization-insensitive electro-optic modulator |
| US20020057858A1 (en) * | 1998-10-29 | 2002-05-16 | Guangning Yang | Electro-optic modulator for generating solitons |
| EP1279999A1 (en) * | 2001-07-23 | 2003-01-29 | Corning Incorporated | Polarization-insensitive variable optical attenuator |
| EP1536273A1 (en) * | 2003-11-25 | 2005-06-01 | C.S.E.M. Centre Suisse D'electronique Et De Microtechnique Sa | Polarization-independent electro-optic modulator |
| CN2906679Y (en) * | 2006-02-17 | 2007-05-30 | 中国科学院上海光学精密机械研究所 | Amplitude modulation effect compensator |
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2006
- 2006-02-17 CN CNB2006100239588A patent/CN100399180C/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4198115A (en) * | 1978-08-16 | 1980-04-15 | Bell Telephone Laboratories, Incorporated | Fabry-Perot resonator using a birefringent crystal |
| EP0357475A1 (en) * | 1988-07-19 | 1990-03-07 | France Telecom | Electro-optical measuring system for the frequency analysis of very wide band signals |
| US5303079A (en) * | 1992-04-09 | 1994-04-12 | At&T Bell Laboratories | Tunable chirp, lightwave modulator for dispersion compensation |
| US6175667B1 (en) * | 1998-09-22 | 2001-01-16 | Nz Applied Technologies Corporation | High-speed polarization-insensitive electro-optic modulator |
| US20020057858A1 (en) * | 1998-10-29 | 2002-05-16 | Guangning Yang | Electro-optic modulator for generating solitons |
| EP1037096A2 (en) * | 1999-03-13 | 2000-09-20 | PIRELLI CAVI E SISTEMI S.p.A. | Directional coupler and mach-zehnder modulator using such coupler |
| EP1279999A1 (en) * | 2001-07-23 | 2003-01-29 | Corning Incorporated | Polarization-insensitive variable optical attenuator |
| EP1536273A1 (en) * | 2003-11-25 | 2005-06-01 | C.S.E.M. Centre Suisse D'electronique Et De Microtechnique Sa | Polarization-independent electro-optic modulator |
| CN2906679Y (en) * | 2006-02-17 | 2007-05-30 | 中国科学院上海光学精密机械研究所 | Amplitude modulation effect compensator |
Non-Patent Citations (4)
| Title |
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| Fundamental nonlinear distortions in analog links withfiber amplifier. C.Y Kuo.JOURNAL OF LIGHTWAVE TECHNOLOGY,Vol.11 No.1. 1993 |
| Fundamental nonlinear distortions in analog links withfiber amplifier. C.Y Kuo.JOURNAL OF LIGHTWAVE TECHNOLOGY,Vol.11 No.1. 1993 * |
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| 基于光纤环形镜的全光脉冲整形器. 蒋运涛，罗航，李学春等.中国激光，第32卷第9期. 2005 * |
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| CN1844993A (en) | 2006-10-11 |
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