CN104765176A - Liquid crystal spatial modulation regenerative amplifier - Google Patents
Liquid crystal spatial modulation regenerative amplifier Download PDFInfo
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- CN104765176A CN104765176A CN201510206354.6A CN201510206354A CN104765176A CN 104765176 A CN104765176 A CN 104765176A CN 201510206354 A CN201510206354 A CN 201510206354A CN 104765176 A CN104765176 A CN 104765176A
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- crystal spatial
- light
- enlarged cavity
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- 230000001172 regenerating effect Effects 0.000 title claims abstract description 48
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 44
- 230000003321 amplification Effects 0.000 claims abstract description 36
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 36
- 230000003287 optical effect Effects 0.000 claims abstract description 18
- 230000010287 polarization Effects 0.000 claims abstract description 9
- 230000008929 regeneration Effects 0.000 claims description 37
- 238000011069 regeneration method Methods 0.000 claims description 37
- 230000001276 controlling effect Effects 0.000 claims description 12
- 230000008676 import Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 241001270131 Agaricus moelleri Species 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 230000028161 membrane depolarization Effects 0.000 claims description 3
- 238000002310 reflectometry Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000013078 crystal Substances 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000001307 laser spectroscopy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000001629 suppression Effects 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
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/39—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves
-
- 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
-
- 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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/107—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using electro-optic devices, e.g. exhibiting Pockels or Kerr effect
Abstract
The invention discloses a liquid crystal spatial modulation regenerative amplifier. The liquid crystal spatial modulation regenerative amplifier comprises a box and an optical assembly. A left side plate of the box is provided with an incident seed light inlet, and a right side plate is provided with an emitting amplification light outlet. The optical assembly is arranged in the box and comprises a light isolator, a regenerative resonance amplification cavity and a 45-degree total reflector. The light isolator comprises a first polarization piece, a Faraday rotator and a half wave plate. The regenerative resonance amplification cavity comprises a second polarization piece, a pulse selective switch, a 0-degree total reflector, a third polarization piece, an LD pumping laser crystal module, a first quarter wave plate, a concave lens, a beam expander, a liquid crystal space modulator and a drive of the liquid crystal space modulator. The liquid crystal spatial modulation regenerative amplifier has the advantages that the liquid crystal space modulator is placed in a regenerative resonance amplification cavity, modulation control over amplification light spots is achieved, Gaussian beam light spots are modulated into flat top type or U-shaped light spots, the self-focusing phenomenon is avoided, the energy of gain media is extracted, higher-energy regenerative amplification light output is obtained, and a preparation is made for further amplification of laser energy.
Description
Technical field
The present invention relates to laser technology field, in particular to a kind of liquid crystal spatial modulation regenerative amplifier.
Background technology
Ultrashort laser pulses device is widely used in fields such as laser ranging, radar, biology, laser spectroscopy, photoelectricity sampling technique, the communication technology, light holographic storage technology, laser fusion, hyperfine processing and blinding weapon.
The repetition frequency of the laser pulse directly produced by seed light oscillator stage is under normal circumstances hundred megahertzes, and single pulse energy is low, for receiving burnt magnitude, thus limits its application in some field.Exporting for obtaining ultrashort, super strong laser pulse, will amplify oscillator stage seed optical pulse.Row ripple is generally had to amplify and regenerative amplification two kinds to the method that oscillator stage seed optical pulse is amplified.Because the single pulse energy of oscillator stage is receiving burnt magnitude usually, first order amplification utilizes regenerative amplifier as gain amplification stage usually.Regenerative amplifier can select laser pulse from mode locking pulse sequence, makes it come and go several times in the gain medium.Amplify through gain repeatedly, the energy of the laser pulse that amplifier exports can increase 10
6~ 10
7times, thus can will receive burnt magnitude pulse amplifying to a MJ magnitude.And regenerative amplifier has cavity resonator structure, the spatial beam quality that the pulse after amplification has had.The laser that regenerative amplifier exports continues to amplify through post-amplifier again, and energy is further amplified.
The hot spot that general regenerative amplifier exports is Gaussian beam, in seed light amplification process, along with the amplification of energy, single pulse energy is more and more higher, the Self-focusing of Gaussian beam is more and more obvious, and the power density of spot center is more and more stronger, occurs very strong strong point.This as easy as rolling off a log damage threshold exceeding device of strong point because of Gaussian beam self-focusing generation, causes the damage of device, increases the difficulty that laser amplifies further, limit the raising of laser power energy.
Summary of the invention
For solving the problem, a kind of liquid crystal spatial is the object of the present invention is to provide to modulate regenerative amplifier, incident seed optical pulse is made to carry out regenerative amplification in regenerative amplifier, and control the seed optical pulse in amplification process by liquid crystal spatial modulators modulate, effectively avoid the self-focusing in amplification process, strong point phenomenon in hot spot, decreases the damage of device, further increases laser output power.
The invention provides a kind of liquid crystal spatial modulation regenerative amplifier, comprising:
Casing, its left plate is provided with incident seed light import, and described casing right plate is provided with outgoing and amplifies light exit;
Optical module, it is arranged in described casing, comprises optoisolator, regeneration resonance enlarged cavity and 45 ° of total reflective mirrors;
Wherein, described optoisolator is included in the first polaroid, Faraday rotator and 1/2nd wave plates that light path sets gradually;
Described regeneration resonance enlarged cavity comprise the second polaroid, pulse choice switch, 0 ° entirely put mirror, the 3rd polaroid, LD pumped laser crvstal module, the first quarter-wave plate, concavees lens, beam expander, liquid crystal spatial modulator and driving thereof;
Incident seed light imports in described regeneration resonance enlarged cavity through described optoisolator through described incident seed light import successively, the incident seed light imported in described regeneration resonance enlarged cavity carries out resonance amplification in described regeneration resonance enlarged cavity, its depolarization is compensated through described first quarter-wave plate, described concavees lens compensate thermal lensing effect, and drive light spot shape in its resonant process of regulation and control by described LCD Controlling modulator and LCD Controlling modulator, through described pulse choice switch control rule, the seed light of amplification is derived described regeneration resonance enlarged cavity, after described 45 ° of total reflective mirrors total reflection, amplify light exit by described outgoing export.
Further improve as the present invention, described pulse choice switch is made up of the second quarter-wave plate, general gram of box and general gram of box high drive, when described incident seed light is amplified in described regeneration resonance enlarged cavity, the moment added high pressure by regulating described second quarter-wave plate and general gram of box and high pressure width, the resonance controlling incident seed light amplifies number of times and to the moment regenerating resonance enlarged cavity described in outgoing.
Further improve as the present invention, described beam expander is made up of concavees lens and convex lens, expand the business that curvature that multiple is described convex lens obtains divided by the curvature of described concavees lens, described incident seed light is when described regeneration resonance enlarged cavity amplifies, by described beam expander, vibration hot spot is expanded, be convenient to described LCD Controlling modulator to the adjustment of hot spot.
Further improve as the present invention, described incident seed light forms 180 ° of angles with the regenerative amplification light through described regeneration resonance enlarged cavity.
Further improve as the present invention, the chamber length of described regeneration resonance enlarged cavity is the integral multiple that adjacent locked mode seed optical pulse spacing corresponding cavity is long, wherein, multiple is the number selecting described locked mode seed optical pulse to be exported by regenerative amplification after described regeneration resonance enlarged cavity.
Further improve as the present invention, described liquid crystal spatial modulator changes the reflectivity of diverse location in the incident seed hot spot of regenerative amplification, realizes the adjustment to hot spot, obtains the flat-top hot spot or U-shaped hot spot being convenient to amplify.
Further improve as the present invention, the polarization state through the incident seed light of described second polaroid after described 3rd polaroid reflection is consistent with the polarization state of described liquid crystal spatial modulator.
Further improve as the present invention, described first polaroid, described second polaroid, described 3rd polaroid, 1/2nd wave plates, described first quarter-wave plate, described second quarter-wave plate, described 45 ° of total reflective mirrors, described concavees lens, described convex lens, described LD pumped laser crvstal module are all coated with the anti-reflection film consistent with the wave band of described incident seed light or highly reflecting films with described liquid crystal spatial modulator.
Beneficial effect of the present invention is: provide and a kind of weak seed optical pulse is realized regenerative amplification, there is very high enlargement factor, and spatially shaping is carried out to light pulse, the Self-focusing that effective suppression is caused excessively by force by light intensity, avoid the damage of components and parts, more high-power Laser output can be realized, amplify for follow-up laser power and done good pre-service.Concrete:
1, use optoisolator, achieve the isolation and amplifier of incident seed light and regenerative amplification light.Incident seed optical pulse imports in regeneration resonance enlarged cavity through optoisolator and realizes regenerative amplification, energy sharply amplifies, the amplification light pulse exported isolate with incident light pulse light path through optoisolator and separate, reflects from the output of outgoing amplification light exit through 45 ° of total reflective mirrors.
2, adopt regeneration resonance enlarged cavity, faint seed optical pulse carrying out sharply can be amplified.
3, ensure that the hot spot at the stability of resonator cavity and liquid crystal spatial modulator place is enough large, the hot spot of each components and parts is moderate.
4, adopt beam expander, achieve in chamber the expansion of the hot spot that vibrates, improve the modulation capability of follow-up liquid crystal spatial modulator.
5, adopt liquid crystal spatial modulator, achieve the hot spot modulation reshaping that vibrates in chamber, effectively inhibit the self-focusing efficiency of Gaussian beam, avoid the damage of components and parts.
Accompanying drawing explanation
Fig. 1 is the casing left plate schematic diagram of a kind of liquid crystal spatial modulation regenerative amplifier described in the embodiment of the present invention;
Fig. 2 is the casing right plate schematic diagram of a kind of liquid crystal spatial modulation regenerative amplifier described in the embodiment of the present invention;
Fig. 3 is the box house light path schematic diagram of a kind of liquid crystal spatial modulation regenerative amplifier described in the embodiment of the present invention.
In figure,
1, optoisolator; 2, resonance enlarged cavity is regenerated; 3,45 ° of total reflective mirrors; 4, incident seed light import; 5, light exit is amplified in outgoing; 11, the first polaroid; 12, Faraday rotator; 13,1/2nd wave plates; 21, the second polaroid; 22, pulse choice switch; 23, full mirror is put for 0 °; 24, the 3rd polaroid; 25, LD pumped laser crvstal module; 26, the first quarter-wave plate; 27, concavees lens; 28, beam expander; 29, liquid crystal spatial modulator and driving thereof; 221, the second quarter-wave plate; 222, general gram of box high drive; 223, general gram of box; 281, concavees lens; 282, convex lens; 291, liquid crystal spatial modulator; 292, liquid crystal spatial modulator drives.
Embodiment
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
Embodiment 1, as Figure 1-3, a kind of liquid crystal spatial modulation regenerative amplifier described in the embodiment of the present invention, comprising:
Casing, its left plate is provided with incident seed light import 4, and casing right plate is provided with outgoing and amplifies light exit 5;
Optical module, it is arranged in casing, comprises optoisolator 1, regeneration resonance enlarged cavity 2 and 45 ° of total reflective mirrors 3;
Wherein, optoisolator 1 is included in the first polaroid 11, Faraday rotator 12 and 1/2nd wave plates 13 that light path sets gradually;
Regeneration resonance enlarged cavity 2 comprises the second polaroid 21,22,0 °, pulse choice switch puts mirror 23 entirely, the 3rd polaroid 24, LD pumped laser crvstal module 25, first quarter-wave plate 26, concavees lens 27, beam expander 28, liquid crystal spatial modulator and drive 29;
Incident seed light imports in regeneration resonance enlarged cavity 2 through optoisolator 1 through incident seed light import 4 successively, the incident seed light imported in regeneration resonance enlarged cavity 2 carries out resonance amplification in regeneration resonance enlarged cavity 2, its depolarization is compensated through the first quarter-wave plate 26, concavees lens 27 compensate thermal lensing effect, and drive light spot shape in 291 its resonant process of regulation and control by LCD Controlling modulator 292 and LCD Controlling modulator, control through pulse selector switch 22, the seed light of amplifying is derived regeneration resonance enlarged cavity 2, after 45 ° of total reflective mirrors 3 are totally reflected, amplify light exit 5 by outgoing export.
Wherein, pulse choice switch 22 is made up of the second quarter-wave plate 221, general gram of box 223 and general gram of box high drive 222, when incident seed light is amplified in regeneration resonance enlarged cavity 2, the moment added high pressure by regulating the second quarter-wave plate 221 and general gram of box 223 and high pressure width, the resonance controlling incident seed light amplifies number of times and the moment to outgoing regeneration resonance enlarged cavity 2.
Beam expander 28 is made up of concavees lens 281 and convex lens 282, expand the business that curvature that multiple is convex lens 282 obtains divided by the curvature of concavees lens 281, incident seed light is when regenerating resonance enlarged cavity 2 and amplifying, by beam expander 28, vibration hot spot is expanded, be convenient to the adjustment of LCD Controlling modulator 292 pairs of hot spots.
Incident seed light forms 180 ° of angles with the light through regenerating resonance enlarged cavity 2 regenerative amplification.
Regeneration resonance enlarged cavity 2 adopts LASCAD resonator cavity simulation software to design, and ensure that the spot size at liquid crystal spatial modulator 292 place is enough large, in chamber, the hot spot in other places is moderate.
The chamber length of regeneration resonance enlarged cavity 2 is integral multiples that adjacent locked mode seed optical pulse spacing corresponding cavity is long, and wherein, multiple is the number selecting locked mode seed optical pulse to be exported by regenerative amplification after regeneration resonance enlarged cavity 2.
Liquid crystal spatial modulator 292 changes the reflectivity of diverse location in the incident seed hot spot of regenerative amplification, realizes the adjustment to hot spot, obtains the flat-top hot spot or U-shaped hot spot being convenient to amplify.
The polarization state of the incident seed light after the second polaroid 21 reflects with the 3rd polaroid 24 is consistent with the polarization state of liquid crystal spatial modulator 292.
Incident seed light is amplified at regeneration resonance enlarged cavity 2 resonance, light spot shape in its amplification process of liquid crystal spatial modulators modulate 292, control its number of oscillation in regeneration resonance enlarged cavity by pulse choice switch 22, when being amplified to ceiling capacity, selecting to export and amplifying light.
Wherein, the first polaroid 11, second polaroid 21, the 3rd polaroid 24,1/2nd wave plate 13, first quarter-wave plate 26, second quarter-wave plate 221,45 ° of total reflective mirrors 3, concavees lens 281, convex lens 282, LD pumped laser crvstal module 25 are all coated with the anti-reflection film consistent with the wave band of incident seed light or highly reflecting films with liquid crystal spatial modulator 292.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a liquid crystal spatial modulation regenerative amplifier, is characterized in that, comprising:
Casing, its left plate is provided with incident seed light import (4), and described casing right plate is provided with outgoing and amplifies light exit (5);
Optical module, it is arranged in described casing, comprises optoisolator (1), regeneration resonance enlarged cavity (2) and 45 ° of total reflective mirrors (3);
Wherein, described optoisolator (1) is included in the first polaroid (11), Faraday rotator (12) and 1/2nd wave plates (13) that light path sets gradually;
Described regeneration resonance enlarged cavity (2) comprise the second polaroid (21), pulse choice switch (22), 0 ° entirely put mirror (23), the 3rd polaroid (24), LD pumped laser crvstal module (25), the first quarter-wave plate (26), concavees lens (27), beam expander (28), liquid crystal spatial modulator and driving (29) thereof;
Incident seed light imports in described regeneration resonance enlarged cavity (2) through described optoisolator (1) through described incident seed light import (4) successively, the incident seed light imported in described regeneration resonance enlarged cavity (2) carries out resonance amplification in described regeneration resonance enlarged cavity (2), its depolarization is compensated through described first quarter-wave plate (26), described concavees lens (27) compensate thermal lensing effect, and drive (291) to regulate and control light spot shape in its resonant process by described LCD Controlling modulator (292) and LCD Controlling modulator, control through described pulse choice switch (22), the seed light of amplification is derived described regeneration resonance enlarged cavity (2), after described 45 ° of total reflective mirrors (3) total reflection, amplify light exit (5) by described outgoing export.
2. liquid crystal spatial modulation regenerative amplifier according to claim 1, it is characterized in that, described pulse choice switch (22) is by the second quarter-wave plate (221), general gram of box (223) and general gram of box high drive (222) composition, when described incident seed light is amplified in described regeneration resonance enlarged cavity (2), the moment added high pressure by regulating described second quarter-wave plate (221) and general gram of box (223) and high pressure width, the resonance controlling incident seed light amplifies number of times and to the moment regenerating resonance enlarged cavity (2) described in outgoing.
3. liquid crystal spatial modulation regenerative amplifier according to claim 1, it is characterized in that, described beam expander (28) is made up of concavees lens (281) and convex lens (282), expand the business that curvature that multiple is described convex lens (282) obtains divided by the curvature of described concavees lens (281), described incident seed light is when described regeneration resonance enlarged cavity (2) amplifies, by described beam expander (28), vibration hot spot is expanded, be convenient to described LCD Controlling modulator (292) to the adjustment of hot spot.
4. liquid crystal spatial modulation regenerative amplifier according to claim 1, is characterized in that: described incident seed light forms 180 ° of angles with the regenerative amplification light through described regeneration resonance enlarged cavity (2).
5. liquid crystal spatial modulation regenerative amplifier according to claim 1, it is characterized in that: the chamber length of described regeneration resonance enlarged cavity (2) is the integral multiple that adjacent locked mode seed optical pulse spacing corresponding cavity is long, wherein, multiple be select described locked mode seed optical pulse by described regeneration resonance enlarged cavity (2) afterwards regenerative amplification output number.
6. liquid crystal spatial modulation regenerative amplifier according to claim 1, it is characterized in that: described liquid crystal spatial modulator (292) changes the reflectivity of diverse location in the incident seed hot spot of regenerative amplification, realize the adjustment to hot spot, obtain the flat-top hot spot or U-shaped hot spot being convenient to amplify.
7. liquid crystal spatial modulation regenerative amplifier according to claim 1, is characterized in that: the polarization state through the incident seed light of described second polaroid (21) after described 3rd polaroid (24) reflection is consistent with the polarization state of described liquid crystal spatial modulator (292).
8. the liquid crystal spatial modulation regenerative amplifier according to any one of claim 1-7, it is characterized in that, described first polaroid (11), described second polaroid (21), described 3rd polaroid (24), / 2nd wave plates (13), described first quarter-wave plate (26), described second quarter-wave plate (221), described 45 ° of total reflective mirrors (3), described concavees lens (281), described convex lens (282), described LD pumped laser crvstal module (25) is all coated with the anti-reflection film consistent with the wave band of described incident seed light or highly reflecting films with described liquid crystal spatial modulator (292).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510206354.6A CN104765176B (en) | 2015-04-27 | 2015-04-27 | A kind of liquid crystal spatial modulates regenerative amplifier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510206354.6A CN104765176B (en) | 2015-04-27 | 2015-04-27 | A kind of liquid crystal spatial modulates regenerative amplifier |
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| CN104765176A true CN104765176A (en) | 2015-07-08 |
| CN104765176B CN104765176B (en) | 2017-06-30 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5572358A (en) * | 1994-12-16 | 1996-11-05 | Clark-Mxr, Inc. | Regenerative amplifier incorporating a spectral filter within the resonant cavity |
| US20020186380A1 (en) * | 1999-06-24 | 2002-12-12 | Drake Thomas E. | System and method for high-speed laser detection of ultrasound |
| CN101750836A (en) * | 2009-12-25 | 2010-06-23 | 中山大学 | Ultra-short-pulse laser frequency-doubled continuous attenuator |
| CN102623881A (en) * | 2012-03-22 | 2012-08-01 | 北京国科世纪激光技术有限公司 | Adjustment method for laser output energy |
| CN103296577A (en) * | 2013-05-22 | 2013-09-11 | 北京工业大学 | kHz green ray picosecond laser device used for satellite distance measurement |
-
2015
- 2015-04-27 CN CN201510206354.6A patent/CN104765176B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5572358A (en) * | 1994-12-16 | 1996-11-05 | Clark-Mxr, Inc. | Regenerative amplifier incorporating a spectral filter within the resonant cavity |
| US20020186380A1 (en) * | 1999-06-24 | 2002-12-12 | Drake Thomas E. | System and method for high-speed laser detection of ultrasound |
| CN101750836A (en) * | 2009-12-25 | 2010-06-23 | 中山大学 | Ultra-short-pulse laser frequency-doubled continuous attenuator |
| CN102623881A (en) * | 2012-03-22 | 2012-08-01 | 北京国科世纪激光技术有限公司 | Adjustment method for laser output energy |
| CN103296577A (en) * | 2013-05-22 | 2013-09-11 | 北京工业大学 | kHz green ray picosecond laser device used for satellite distance measurement |
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Effective date of registration: 20231007 Address after: 100044 109, building 7, No. 28, gaoliangqiaoxie street, Haidian District, Beijing Patentee after: BEIJING YINGKE TECHNOLOGY CO.,LTD. Address before: 100124 No. 100 Chaoyang District Ping Tian Park, Beijing Patentee before: Beijing University of Technology |
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