CN105633777A - Selenium-gallium-barium optical parameter oscillator for quickly tuning output wavelength - Google Patents
Selenium-gallium-barium optical parameter oscillator for quickly tuning output wavelength Download PDFInfo
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- CN105633777A CN105633777A CN201610121502.9A CN201610121502A CN105633777A CN 105633777 A CN105633777 A CN 105633777A CN 201610121502 A CN201610121502 A CN 201610121502A CN 105633777 A CN105633777 A CN 105633777A
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- opo
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- 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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/101—Lasers provided with means to change the location from which, or the direction in which, laser radiation is emitted
Abstract
The invention provides a selenium-gallium-barium optical parameter oscillator for quickly tuning an output wavelength, relates to an optical parameter oscillator and aims at solving the technical problems of a nonlinear crystal damage and a low tuning speed, which are easily caused in existing two output wavelength tuning modes, namely nonlinear crystal angle rotation and nonlinear crystal temperature adjustment, for the optical parameter oscillator. The selenium-gallium-barium optical parameter oscillator comprises a pump source, an optical isolator, an acoustic-optic modulator, an OPO input mirror, BaGa<4>Se<7> crystal, an OPO output mirror and a light filter, wherein the pump source, the optical isolator, the acoustic-optic modulator, the OPO input mirror, the BaGa<4>Se<7> crystal, the OPO output mirror and the light filter are sequentially arranged along an output light beam direction of the pump source; the OPO input mirror, the OPO output mirror and a light transmitting surface of the BaGa<4>Se<7> crystal all are parallel to one another; and the light transmitting surface of the OPO input mirror is vertical to the output light beam direction of the pump source. The selenium-gallium-barium optical parameter oscillator is applied to the technical field of a mid-infrared laser light.
Description
Technical field:
The present invention relates to a kind of optical parametric oscillator.
Background technology:
In tunable output wavelength, infrared 3-5 micron waveband laser has important application in fields such as biologic medical, spectroscopy, atmospheric exploration, photoelectronic warfares. In biologic medical field, the light source of this wave band is the important tool of research protein folding kinetics, biomolecules identification, high precision Minimally Invasive Surgery, laser radar detection etc. Meanwhile, utilize this wave band of laser to the characteristic absorpting spectruming line of each gas molecule, moreover it is possible to use it for the medical diagnosis weighing gas detection, atmospheric exploration and breath. Optical parametric oscillator is the effective way producing mid-infrared laser, main output wavelength tuning manner is rotate nonlinear crystal angle and adjustment nonlinear crystal temperature, and these two kinds of modes exist the problem easily causing nonlinear crystal damage slow with tuned speed respectively.
Summary of the invention
The present invention to be solved two kinds of output wavelength tuning manners rotation nonlinear crystal angles of current optical parametric oscillator and adjust nonlinear crystal temperature to there is the technical problem easily causing nonlinear crystal damage slow with tuned speed respectively, and provides the selenium gallium barium optical parametric oscillator of a kind of quick tuning operation wavelength.
The selenium gallium barium optical parametric oscillator of a kind of quick tuning operation wavelength of the present invention inputs mirror 4, BaGa by pumping source 1, optical isolator 2, acousto-optic modulation device 3, OPO4Se7Crystal 5, OPO export mirror 6 and spectral filter 7 forms;
Pumping source 1 is placed in output beam direction along pumping source 1 successively, optical isolator 2, acousto-optic modulation device 3, OPO input mirror 4, BaGa4Se7Crystal 5, OPO export mirror 6 and spectral filter 7; OPO inputs mirror 4, OPO exports mirror 6 and BaGa4Se7The logical light face of crystal 5 is parallel mutually, and the logical light face of OPO input mirror 4 is perpendicular to the output beam direction of pumping source 1; Normal direction and the optical axis of spectral filter 7 are at 45 ��.
The optical axis of crystal is that light propagates the direction not producing birefringent phenomenon in the crystal of anisotropy.
The present invention utilizes selenium gallium barium (BaGa4Se7) crystal is to the characteristic of phase matching angle sensitivity, it is achieved output wavelength tuning fast. In the present invention, the effect of optical isolator 2 prevents pumping from feeding back, and the effect of acousto-optic modulation device 3 is the incident angle of deflection pump light, and OPO inputs mirror 4 and OPO output mirror 6 forms OPO resonator cavity, and the effect of spectral filter 7 is the remaining pump light of filtering. The pump light that pumping source 1 exports is by, after optical isolator 2, entering into acousto-optic modulation device 3, and the pump light after acousto-optic modulation device 3 deflecting direction reenters and is mapped to OPO input mirror 4, reenters and is mapped to BaGa4Se7Producing parameteric light after crystal 5, the parameteric light of generation vibrates in OPO resonator cavity thus energy is amplified, and exports mirror 6 Output of laser from OPO, then passes through the filter plate 7 remaining pump light of filtering, the mid-infrared laser needed for reservation. The present invention is applied to the radio frequency power size of acousto-optic modulation device 3 by adjustment, changes the angle from acousto-optic modulation device 3 emergent light, thus changes BaGa4Se7The optical axis of crystal 5 and the angle of incoming beam, it is achieved output wavelength tuning. The parameteric light produced vibrates in OPO resonator cavity thus energy is amplified, and exports from output mirror 6, then by the spectral filter 7 remaining pump light of filtering, retains mid-infrared laser.
Invention advantage:
Without the need to mechanical devices and temperature control, the present invention can realize fast that output wavelength is tuning, avoid the lens lesion problem rotating nonlinear crystal tuning manner and bringing, it also avoid the tuning slow problem of wavelength that temperature control mode brings, the tuning incident angle of light of acousto-optic modulation device has quick, stable advantage.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the selenium gallium barium optical parametric oscillator of the quick tuning operation wavelength of the present invention, 1 be pumping source, 2 for optical isolator, 3 for acousto-optic modulation device, 4 for OPO input mirror, 5 be BaGa4Se7Crystal, 6 is OPO output mirror, and 7 is spectral filter, and arrow is direction of beam propagation.
Embodiment
Embodiment one: composition graphs 1, present embodiment is the selenium gallium barium optical parametric oscillator of a kind of quick tuning operation wavelength, specifically inputs mirror 4, BaGa by pumping source 1, optical isolator 2, acousto-optic modulation device 3, OPO4Se7Crystal 5, OPO export mirror 6 and spectral filter 7 forms;
Pumping source 1 is placed in output beam direction along pumping source 1 successively, optical isolator 2, acousto-optic modulation device 3, OPO input mirror 4, BaGa4Se7Crystal 5, OPO export mirror 6 and spectral filter 7; OPO inputs mirror 4, OPO exports mirror 6 and BaGa4Se7The logical light face of crystal 5 is parallel mutually, and the logical light face of OPO input mirror 4 is perpendicular to the output beam direction of pumping source 1; Normal direction and the optical axis of spectral filter 7 are at 45 ��.
Embodiment two: the difference of present embodiment and embodiment one is: described pumping source 1 is q-operation 2.09 microns of solid statelasers, and Output of laser is linear polarization, and polarization direction is perpendicular to output beam direction and the BaGa of pumping source 14Se7The plane that the optical axis of crystal 5 is formed, pulse-repetition frequency 100Hz��100000Hz, pulse width 10��100ns. Other are identical with embodiment one.
Embodiment three: the difference of present embodiment and embodiment one or two is: two end faces of described optical isolator 2 are coated with 2.09 microns of anti-reflection films. Other are identical with embodiment one or two.
Embodiment four: the difference of present embodiment and embodiment one to three is: two end faces of described acousto-optic modulation device 3 are coated with 2.09 microns of anti-reflection films. Other are identical with embodiment one to three.
Embodiment five: the difference of present embodiment and embodiment one to four is: two end faces that described OPO inputs mirror 4 are coated with 2.09 microns of pump light transmitances > 97% deielectric-coating, and OPO inputs mirror 4 near BaGa4Se7The end face of crystal 5 is coated with the deielectric-coating that parameteric light reflectivity is greater than 99%. Other are identical with embodiment one to four.
Embodiment six: the difference of present embodiment and embodiment one to five is: described BaGa4Se7The length of crystal 5 is 40mm, and BaGa4Se7Two end faces of crystal 5 are coated with the deielectric-coating that pump light transmitance and parameteric light transmitance are all greater than 99%. Other are identical with embodiment one to five.
Embodiment seven: the difference of present embodiment and embodiment one to six is: two end faces that described OPO exports mirror 6 are coated with the deielectric-coating that 2.09 microns of pump light transmitances are greater than 97%, and OPO exports mirror 6 near BaGa4Se7It is the deielectric-coating of 50% that the end face of crystal 5 is coated with parameteric light transmissivity. Other are identical with embodiment one to six.
Embodiment eight: the difference of present embodiment and embodiment one to seven is: described spectral filter 7 is coated with 2.09 microns of pump light reflectivity near the end face exporting mirror 6 > 99% deielectric-coating, and the two of spectral filter 7 end faces are coated with the deielectric-coating that parameteric light transmissivity is greater than 99%. Other are identical with embodiment one to seven.
Claims (8)
1. the selenium gallium barium optical parametric oscillator of a quick tuning operation wavelength, it is characterised in that the selenium gallium barium optical parametric oscillator of tuning operation wavelength inputs mirror (4), BaGa by pumping source (1), optical isolator (2), acousto-optic modulation device (3), OPO fast4Se7Crystal (5), OPO export mirror (6) and spectral filter (7) composition;
Output beam direction along pumping source (1) places pumping source (1), optical isolator (2), acousto-optic modulation device (3), OPO input mirror (4), BaGa successively4Se7Crystal (5), OPO export mirror (6) and spectral filter (7); OPO inputs mirror (4), OPO exports mirror (6) and BaGa4Se7The logical light face of crystal (5) is parallel mutually, and the logical light face of OPO input mirror (4) is perpendicular to the output beam direction of pumping source (1); Normal direction and the optical axis of spectral filter (7) are at 45 ��.
2. the selenium gallium barium optical parametric oscillator of a kind of quick tuning operation wavelength according to claim 1, it is characterized in that described pumping source (1) is for q-operation 2.09 microns of solid statelasers, and Output of laser is linear polarization, polarization direction is perpendicular to output beam direction and the BaGa of pumping source (1)4Se7The plane that the optical axis of crystal (5) is formed, pulse-repetition frequency 100Hz��100000Hz, pulse width 10��100ns.
3. the selenium gallium barium optical parametric oscillator of a kind of quick tuning operation wavelength according to claim 1, it is characterised in that two end faces of described optical isolator (2) are coated with 2.09 microns of anti-reflection films.
4. the selenium gallium barium optical parametric oscillator of a kind of quick tuning operation wavelength according to claim 1, it is characterised in that two end faces of described acousto-optic modulation device (3) are coated with 2.09 microns of anti-reflection films.
5. the selenium gallium barium optical parametric oscillator of a kind of quick tuning operation wavelength according to claim 1, it is characterized in that two end faces that described OPO inputs mirror (4) are coated with 2.09 microns of pump light transmitances > deielectric-coating of 97%, and OPO inputs mirror (4) near BaGa4Se7The end face of crystal (5) is coated with the deielectric-coating that parameteric light reflectivity is greater than 99%.
6. the selenium gallium barium optical parametric oscillator of a kind of quick tuning operation wavelength according to claim 1, it is characterised in that described BaGa4Se7The length of crystal (5) is 40mm, and BaGa4Se7Two end faces of crystal (5) are coated with the deielectric-coating that pump light transmitance and parameteric light transmitance are all greater than 99%.
7. the selenium gallium barium optical parametric oscillator of a kind of quick tuning operation wavelength according to claim 1, it is characterized in that two end faces of described OPO output mirror (6) are coated with the deielectric-coating that 2.09 microns of pump light transmitances are greater than 97%, and OPO exports mirror (6) near BaGa4Se7It is the deielectric-coating of 50% that the end face of crystal (5) is coated with parameteric light transmissivity.
8. the selenium gallium barium optical parametric oscillator of a kind of quick tuning operation wavelength according to claim 1, it is characterized in that described spectral filter (7) is coated with 2.09 microns of pump light reflectivity near the end face exporting mirror (6) > deielectric-coating of 99%, and two end faces of spectral filter (7) are coated with the deielectric-coating that parameteric light transmissivity is greater than 99%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610121502.9A CN105633777A (en) | 2016-03-03 | 2016-03-03 | Selenium-gallium-barium optical parameter oscillator for quickly tuning output wavelength |
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| CN201610121502.9A CN105633777A (en) | 2016-03-03 | 2016-03-03 | Selenium-gallium-barium optical parameter oscillator for quickly tuning output wavelength |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211825A (en) * | 2018-10-10 | 2019-01-15 | 吉林大学 | Solution gas infrared detecting device and method in a kind of water using acoustooptical effect collimated light path |
| CN113285341A (en) * | 2021-04-09 | 2021-08-20 | 中国人民解放军国防科技大学 | Narrow-linewidth middle-far infrared laser based on selenium-gallium-barium crystal |
| CN114188812A (en) * | 2021-12-07 | 2022-03-15 | 哈尔滨工业大学 | Temperature-tuned 9-11-micrometer long-wave infrared solid laser |
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| US4068191A (en) * | 1975-08-22 | 1978-01-10 | Gte Laboratories Incorporated | Acoustooptic modulator for optical fiber waveguides |
| CN1173059A (en) * | 1996-04-30 | 1998-02-11 | 理化学研究所 | Optically parametric oscillator |
| US6031852A (en) * | 1997-05-30 | 2000-02-29 | The Regents Of The University Of California | Rapid acoustooptic tuner and phase-shifter |
| CN102780153A (en) * | 2012-07-17 | 2012-11-14 | 清华大学 | Acousto-optic frequency sweeping laser based on acousto-optic deflection device |
| CN104868354A (en) * | 2015-04-22 | 2015-08-26 | 中国科学院理化技术研究所 | Optical parameter laser apparatus |
| CN105140760A (en) * | 2015-09-30 | 2015-12-09 | 中国科学院合肥物质科学研究院 | Medical 6-micrometer waveband optical parameter laser |
| CN105226491A (en) * | 2015-10-29 | 2016-01-06 | 中国科学院合肥物质科学研究院 | A kind of selenium gallium barium optical parametric oscillator of 3 micron waveband solid state laser pumpings |
-
2016
- 2016-03-03 CN CN201610121502.9A patent/CN105633777A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4068191A (en) * | 1975-08-22 | 1978-01-10 | Gte Laboratories Incorporated | Acoustooptic modulator for optical fiber waveguides |
| CN1173059A (en) * | 1996-04-30 | 1998-02-11 | 理化学研究所 | Optically parametric oscillator |
| US6031852A (en) * | 1997-05-30 | 2000-02-29 | The Regents Of The University Of California | Rapid acoustooptic tuner and phase-shifter |
| CN102780153A (en) * | 2012-07-17 | 2012-11-14 | 清华大学 | Acousto-optic frequency sweeping laser based on acousto-optic deflection device |
| CN104868354A (en) * | 2015-04-22 | 2015-08-26 | 中国科学院理化技术研究所 | Optical parameter laser apparatus |
| CN105140760A (en) * | 2015-09-30 | 2015-12-09 | 中国科学院合肥物质科学研究院 | Medical 6-micrometer waveband optical parameter laser |
| CN105226491A (en) * | 2015-10-29 | 2016-01-06 | 中国科学院合肥物质科学研究院 | A kind of selenium gallium barium optical parametric oscillator of 3 micron waveband solid state laser pumpings |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211825A (en) * | 2018-10-10 | 2019-01-15 | 吉林大学 | Solution gas infrared detecting device and method in a kind of water using acoustooptical effect collimated light path |
| CN113285341A (en) * | 2021-04-09 | 2021-08-20 | 中国人民解放军国防科技大学 | Narrow-linewidth middle-far infrared laser based on selenium-gallium-barium crystal |
| CN114188812A (en) * | 2021-12-07 | 2022-03-15 | 哈尔滨工业大学 | Temperature-tuned 9-11-micrometer long-wave infrared solid laser |
| CN114188812B (en) * | 2021-12-07 | 2023-11-17 | 哈尔滨工业大学 | Temperature tuning 9-11 mu m long-wave infrared solid laser |
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