CN103500920A - Pulse single-frequency operating 2.09 micron solid laser - Google Patents
Pulse single-frequency operating 2.09 micron solid laser Download PDFInfo
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- CN103500920A CN103500920A CN201310475776.4A CN201310475776A CN103500920A CN 103500920 A CN103500920 A CN 103500920A CN 201310475776 A CN201310475776 A CN 201310475776A CN 103500920 A CN103500920 A CN 103500920A
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Abstract
The invention discloses a pulse single-frequency operating 2.09 micron solid laser, which relates to the field of light source systems of radar, and aims to solve the problems of low transmittance and conversion efficiency of laser output by the conventional 2 mu m solid laser and large equipment size. According to the pulse single-frequency operating 2.09 micron solid laser, an LD (laser diode) pumped Tm, Ho:YAG laser is selected as a seed light source, and a fiber laser pumped single-doped Ho:YAG laser is used as an oscillator to obtain single-frequency pulse 2.09 mu m laser output; meanwhile, a seed laser injection locking technology is adopted to obtain 2090.9 nm single-frequency pulse laser output with single pulse energy reaching 7.6 mJ when the Q-switch repetition frequency is 100 Hz; all the adopted devices are solid-state devices, so that the all solid-state laser is obtained. A suitable light source can be provided for differential absorption laser radar and coherent Doppler wind finding radar.
Description
Technical field
The invention belongs to the light-source system field of radar.
Background technology
DIAL and coherent Doppler wind-observation radar are the powerfuls of real-time measurement gas composition and atmospheric wind, rely on higher propagation in atmosphere transmitance, it is the high-performance laser emitting source of above-mentioned laser radar that 2 μ m seeds inject the pure-tone pulse solid state laser.According to atmospheric transmittance spectrum, under equal-wattage, the transmission range of the longer 2 μ m laser of wavelength is far away, more is conducive to increase the measuring distance of laser radar.Laser diode, LD, 2 μ m solid-state laser apparatus of pump-coupling have advantages of compact conformation, stable performance and are easy to maintenance etc., are very suitable for practical application.The Tm of LD pumping the Ho dopant material be the effective way that realizes 2 μ m outputs, mainly contain: the Tm material is singly mixed in the LD pumping of (1) 800nm left and right; The Ho material is singly mixed in (2) 1.9 μ m left and right LD pumpings; (3) 800nm left and right LD Pumped Tm, the two materials of mixing of Ho.Method (1), because its gain peak concentrates on 1.9 μ m left and right, is difficult to obtain the 2.1 mum wavelength laser that atmospheric transmittance is higher; Method (2) can realize 2.1 mum wavelength Laser outputs, but current 1.9 μ m left and right LD manufacture crafts are immature, causes that whole device conversion efficiency is low, waste heat is large; Method (3) will be used cryogenic refrigeration equipment effectively to turn round usually, inconvenient practical application.
Summary of the invention
The present invention is in order to solve existing 2 μ m solid state laser Output of laser transmitances and the low problem of conversion efficiency, and a kind of 2.09 microns solid state lasers of pulse single-frequency operation now are provided.
A kind of 2.09 microns solid state lasers of pulse single-frequency operation, it comprises: Tm, Ho:YAG seed laser, Ho:YAG pulse laser and injection frequency locking servo system;
Described Tm, the Ho:YAG seed laser comprises: the first total reflective mirror, Tm, Ho:YAG crystal, polarizing component, the first wavelength tuned cell, second wave length tuned cell, output coupling mirror and laser diode;
Described Ho:YAG pulse laser comprises: 2 μ m output coupling mirrors, the one 2 μ m total reflective mirror, Ho:YAG crystal, the 22 μ m total reflective mirror, the 32 μ m total reflective mirror, acousto-optic Q modulation crystal and fiber laser;
The LD pump light that laser diode sends is successively through the first total reflective mirror, Tm, Ho:YAG crystal, polarizing component, the first wavelength tuned cell, second wave length tuned cell and output coupling mirror transmit Tm, the Ho:YAG seed laser, Tm, the laser of Ho:YAG seed laser output is as seed laser;
2 μ m output coupling mirrors 13, the one 2 μ m total reflective mirror 14, Ho:YAG crystal 15, the 22 μ m total reflective mirror 16, the 32 μ m total reflective mirror 17 and acousto-optic adjusting Q crystal 18 have formed an annular chamber, the seed laser that 2 μ m output coupling mirrors receive it is transmitted on the one 2 μ m total reflective mirror, the one 2 μ m total reflective mirror reflexes to this seed laser at one end of Ho:YAG crystal, the pump light that fiber laser sends sees through the end that the one 2 μ m total reflective mirror incides the Ho:YAG crystal, the exciting light of the other end output of Ho:YAG crystal transmits the Ho:YAG pulse laser through the 22 μ m total reflective mirror, the seed laser of the other end output of Ho:YAG crystal incides on the 22 μ m total reflective mirror, the 22 μ m total reflective mirror reflexes to this seed laser on the 32 μ m total reflective mirror, the 32 μ m total reflective mirror is reverberation and transmitted light by this seed laser beam splitting, this reverberation incides in the acousto-optic Q modulation crystal, this transmitted light transmits the Ho:YAG pulse laser through the 32 μ m total reflective mirror, the pure-tone pulse laser of acousto-optic Q modulation crystal output transmits the Ho:YAG pulse laser through 2 μ m output coupling mirrors,
The drive end that injects the frequency locking servo system carries out resonance scanning for the seed laser that drives the 32 μ m total reflective mirror to receive it, and the control signal output that injects the frequency locking servo system connects the control signal input of acousto-optic Q modulation crystal.
It also comprises: coupled system, and described coupled system comprises: transform lens, 1/2nd wave plates, optics isolated component, the second total reflective mirror, the 3rd total reflective mirror and transform lens;
The seed laser that transform lens receives it is transmitted on the second total reflective mirror by 1/2nd wave plates and optics isolated component successively, the second total reflective mirror reflexes to this seed laser on the 3rd total reflective mirror, the 3rd total reflective mirror reflexes to this seed laser on transform lens, and transform lens transmits coupled system by this seed laser.
Described injection frequency locking servo system comprises: piezoelectric ceramic, Infrared Detectors and electricity servo system;
The drive end of piezoelectric ceramic is as the drive end that injects the frequency locking servo system, the driving signal input of piezoelectric ceramic connects the driving signal output part of electricity servo system, Infrared Detectors is for surveying the resonance intensity of the seed laser that the 32 μ m total reflective mirror transmits, the electrical signal of Infrared Detectors connects the electric signal input end of electricity servo system, and the control signal output of electricity servo system is as the control signal output that injects the frequency locking servo system.
2.09 microns solid state lasers of a kind of pulse single-frequency operation of the present invention, select the Tm of LD pumping, the Ho:YAG laser is as seed light source, that selects optical fiber laser pump singly mixes the Ho:YAG laser as oscillator, has obtained the needed pure-tone pulse 2.09 μ m Laser outputs of radar system; The present invention simultaneously uses the seed laser injection locking technique, when adjusting the Q repetition rate to be 100Hz, obtains the 2090.9nm pure-tone pulse Laser output that single pulse energy reaches 7.6mJ, and laser linewidth is 3.5MHz, and pulse duration is 132ns; And the present invention all adopts solid state device, obtained all solid state laser.2.09 microns solid state lasers of a kind of pulse single-frequency operation of the present invention can provide applicable light source for DIAL and coherent Doppler wind-observation radar.
The accompanying drawing explanation
Fig. 1 is a kind of structural representation of 2.09 microns solid state lasers of pulse single-frequency operation.
Embodiment
Embodiment one: with reference to Fig. 1, illustrate present embodiment, 2.09 microns solid state lasers of the described a kind of pulse single-frequency operation of present embodiment, it comprises: Tm, Ho:YAG seed laser, Ho:YAG pulse laser and injection frequency locking servo system;
Described Tm, the Ho:YAG seed laser comprises: the first total reflective mirror 1, Tm, Ho:YAG crystal 2, polarizing component 3, the first wavelength tuned cell 4, second wave length tuned cell 5, output coupling mirror 6 and laser diode 22;
Described Ho:YAG pulse laser comprises: 2 μ m output coupling mirror the 13, the 1 μ m total reflective mirrors 14, Ho:YAG crystal the 15, the 22 μ m total reflective mirror the 16, the 32 μ m total reflective mirror 17, acousto-optic Q modulation crystal 18 and fiber laser 23;
The LD pump light that laser diode 22 sends is successively through the first total reflective mirror 1, Tm, Ho:YAG crystal 2, polarizing component 3, the first wavelength tuned cell 4, second wave length tuned cell 5 and output coupling mirror 6 transmit Tm, the Ho:YAG seed laser, Tm, the laser of Ho:YAG seed laser output is as seed laser;
2 μ m output coupling mirrors 13, the one 2 μ m total reflective mirror 14, Ho:YAG crystal 15, the 22 μ m total reflective mirror 16, the 32 μ m total reflective mirror 17 and acousto-optic adjusting Q crystal 18 have formed an annular chamber, the seed laser that 2 μ m output coupling mirrors 13 receive it is transmitted on the one 2 μ m total reflective mirror 14, the one 2 μ m total reflective mirror 14 reflexes to this seed laser at one end of Ho:YAG crystal 15, the pump light that fiber laser 23 sends sees through the end that the one 2 μ m total reflective mirror 14 incides Ho:YAG crystal 15, the exciting light of the other end output of Ho:YAG crystal 15 transmits the Ho:YAG pulse laser through the 22 μ m total reflective mirror 16, the seed laser of the other end output of Ho:YAG crystal 15 incides on the 22 μ m total reflective mirror 16, the 22 μ m total reflective mirror 16 reflexes to this seed laser on the 32 μ m total reflective mirror 17, the 32 μ m total reflective mirror 17 is reverberation and transmitted light by this seed laser beam splitting, this reverberation incides in acousto-optic Q modulation crystal 18, this transmitted light transmits the Ho:YAG pulse laser through the 32 μ m total reflective mirror 17, the pure-tone pulse laser of acousto-optic Q modulation crystal 18 outputs transmits the Ho:YAG pulse laser through 2 μ m output coupling mirrors 13,
The drive end that injects the frequency locking servo system carries out resonance scanning for the seed laser that drives the 32 μ m total reflective mirror 17 to receive it, and the control signal output that injects the frequency locking servo system connects the control signal input of acousto-optic Q modulation crystal 18.
Polarizing component 3 can guarantee Tm, and the seed laser of Ho:YAG seed laser output is linearly polarized laser; The first wavelength tuned cell 4 and second wave length tuned cell 5 can restricted T m, and the seed laser of Ho:YAG seed laser output is single longitudinal mode laser.
Embodiment two: present embodiment is that 2.09 microns solid state lasers to the described a kind of pulse single-frequency operation of embodiment one are described further, in present embodiment, it also comprises: coupled system, and described coupled system comprises: transform lens 7,1/2nd wave plates 8, optics isolated component 9, the second total reflective mirror 10, the 3rd total reflective mirror 11 and transform lens 12;
The seed laser that transform lens 7 receives it is transmitted on the second total reflective mirror 10 by 1/2nd wave plates 8 and optics isolated component 9 successively, the second total reflective mirror 10 reflexes to this seed laser on the 3rd total reflective mirror 11, the 3rd total reflective mirror 11 reflexes to this seed laser on transform lens 12, and transform lens 12 transmits coupled system by this seed laser.
Embodiment three: present embodiment is that 2.09 microns solid state lasers to the described a kind of pulse single-frequency operation of embodiment one are described further, in present embodiment, described injection frequency locking servo system comprises: piezoelectric ceramic 19, Infrared Detectors 20 and electricity servo system 21;
The drive end of piezoelectric ceramic 19 is as the drive end that injects the frequency locking servo system, the driving signal input of piezoelectric ceramic 19 connects the driving signal output part of electricity servo system 21, Infrared Detectors 20 is for the resonance intensity of the seed laser surveying the 32 μ m total reflective mirror 17 and transmit, the electrical signal of Infrared Detectors 20 connects the electric signal input end of electricity servo system 21, and the control signal output of electricity servo system 21 is as the control signal output that injects the frequency locking servo system.
The seed laser resonance intensity-conversion that Infrared Detectors 20 detects it is the signal of telecommunication, and this signal of telecommunication is sent to electricity servo system 21, electricity servo system 21 is amplified this signal of telecommunication and shaping, then transmit control signal to acousto-optic Q modulation crystal 18, realize the laser generation of Ho:YAG pure-tone pulse.
Embodiment four: present embodiment is that 2.09 microns solid state lasers to the described a kind of pulse single-frequency operation of embodiment two are described further, in present embodiment, the plane of incidence of the first total reflective mirror 1, Tm, the reflecting surface of the two sides of Ho:YAG crystal 2, the second total reflective mirror 10 and the reflecting surface of the 3rd total reflective mirror 11 all are coated with LD pump light transmitance are greater than to 99.5% and the oscillation light reflectivity deielectric-coating that is greater than 99.7%.
Embodiment five: present embodiment is that 2.09 microns solid state lasers to embodiment one, two or three described a kind of pulse single-frequency operations are described further, in present embodiment, the physical length of the annular chamber that 2 μ m output coupling mirror the 13, the 1 μ m total reflective mirrors 14, Ho:YAG crystal the 15, the 22 μ m total reflective mirror the 16, the 32 μ m total reflective mirror 17 and acousto-optic adjusting Q crystal 18 form is 2.8m.
Embodiment six: present embodiment is that 2.09 microns solid state lasers to embodiment one, two or three described a kind of pulse single-frequency operations are described further, in present embodiment, the transmitance of 6 pairs of concussion light of output coupling mirror is 2%, and the plane of incidence of output coupling mirror 6 is coated with the deielectric-coating that LD pump light transmitance is greater than 99.5%.
Embodiment seven: present embodiment is that 2.09 microns solid state lasers to embodiment one, two or three described a kind of pulse single-frequency operations are described further, in present embodiment, the plano-concave mirror that 2 μ m output coupling mirrors 13 are 1000mm for radius of curvature, the deielectric-coating that it is 18% that the concave surface of 2 μ m output coupling mirrors 13 is coated with the oscillation light transmitance.
Embodiment eight: present embodiment is that 2.09 microns solid state lasers to embodiment one, two or three described a kind of pulse single-frequency operations are described further, in present embodiment, the reflecting surface of the one 2 μ m total reflective mirror 14, the reflecting surface of the 22 μ m total reflective mirror 16 and the 32 μ m total reflective mirror 17 concave surfaces all are coated with LD pump light transmitance are greater than to 99.5% and the oscillation light reflectivity deielectric-coating that is greater than 99.7%.
Embodiment nine: present embodiment is that 2.09 microns solid state lasers to embodiment one, two or three described a kind of pulse single-frequency operations are described further, in present embodiment, the plano-concave mirror that the 32 μ m total reflective mirror 17 is 1000mm for radius of curvature.
Embodiment ten: present embodiment is that 2.09 microns solid state lasers to embodiment one, two or three described a kind of pulse single-frequency operations are described further, and in present embodiment, the wavelength of laser diode 22 is 785nm.
Claims (10)
1. 2.09 of a pulse single-frequency operation microns solid state lasers, is characterized in that, it comprises: Tm, Ho:YAG seed laser, Ho:YAG pulse laser and injection frequency locking servo system;
Described Tm, the Ho:YAG seed laser comprises: the first total reflective mirror (1), Tm, Ho:YAG crystal (2), polarizing component (3), the first wavelength tuned cell (4), second wave length tuned cell (5), output coupling mirror (6) and laser diode (22);
Described Ho:YAG pulse laser comprises: 2 μ m output coupling mirrors (13), the one 2 μ m total reflective mirror (14), Ho:YAG crystal (15), the 22 μ m total reflective mirror (16), the 32 μ m total reflective mirror (17), acousto-optic Q modulation crystal (18) and fiber laser (23);
The LD pump light that laser diode (22) sends is successively through the first total reflective mirror (1), Tm, Ho:YAG crystal (2), polarizing component (3), the first wavelength tuned cell (4), second wave length tuned cell (5) and output coupling mirror (6) transmit Tm, the Ho:YAG seed laser, Tm, the laser of Ho:YAG seed laser output is as seed laser;
2 μ m output coupling mirrors (13), the one 2 μ m total reflective mirror (14), Ho:YAG crystal (15), the 22 μ m total reflective mirror (16), the 32 μ m total reflective mirror (17) and acousto-optic adjusting Q crystal (18) have formed an annular chamber, the seed laser that 2 μ m output coupling mirrors (13) receive it is transmitted on the one 2 μ m total reflective mirror (14), the one 2 μ m total reflective mirror (14) reflexes to this seed laser at one end of Ho:YAG crystal (15), the pump light that fiber laser (23) sends sees through the end that the one 2 μ m total reflective mirror (14) incides Ho:YAG crystal (15), the exciting light of the other end output of Ho:YAG crystal (15) transmits the Ho:YAG pulse laser through the 22 μ m total reflective mirror (16), the seed laser of the other end output of Ho:YAG crystal (15) incides on the 22 μ m total reflective mirror (16), the 22 μ m total reflective mirror (16) reflexes to this seed laser on the 32 μ m total reflective mirror (17), the 32 μ m total reflective mirror (17) is reverberation and transmitted light by this seed laser beam splitting, this reverberation incides in acousto-optic Q modulation crystal (18), this transmitted light transmits the Ho:YAG pulse laser through the 32 μ m total reflective mirror (17), the pure-tone pulse laser of acousto-optic Q modulation crystal (18) output transmits the Ho:YAG pulse laser through 2 μ m output coupling mirrors (13),
The drive end that injects the frequency locking servo system carries out resonance scanning for the seed laser that drives the 32 μ m total reflective mirror (17) to receive it, and the control signal output that injects the frequency locking servo system connects the control signal input of acousto-optic Q modulation crystal (18).
2. 2.09 of a kind of pulse single-frequency operation according to claim 1 microns solid state lasers, it is characterized in that, it also comprises: coupled system, and described coupled system comprises: transform lens (7), 1/2nd wave plates (8), optics isolated component (9), the second total reflective mirror (10), the 3rd total reflective mirror (11) and transform lens (12);
The seed laser that transform lens (7) receives it is transmitted on the second total reflective mirror (10) by 1/2nd wave plates (8) and optics isolated component (9) successively, the second total reflective mirror (10) reflexes to this seed laser on the 3rd total reflective mirror (11), it is upper that the 3rd total reflective mirror (11) reflexes to transform lens (12) by this seed laser, and transform lens (12) transmits coupled system by this seed laser.
3. 2.09 of a kind of pulse single-frequency operation according to claim 1 microns solid state lasers, is characterized in that, described injection frequency locking servo system comprises: piezoelectric ceramic (19), Infrared Detectors (20) and electricity servo system (21);
The drive end of piezoelectric ceramic (19) is as the drive end that injects the frequency locking servo system, the driving signal input of piezoelectric ceramic (19) connects the driving signal output part of electricity servo system (21), Infrared Detectors (20) is for the resonance intensity of the seed laser surveying the 32 μ m total reflective mirror (17) and transmit, the electrical signal of Infrared Detectors (20) connects the electric signal input end of electricity servo system (21), and the control signal output of electricity servo system (21) is as the control signal output that injects the frequency locking servo system.
4. 2.09 of a kind of pulse single-frequency operation according to claim 2 microns solid state lasers, it is characterized in that, the plane of incidence, the Tm of the first total reflective mirror (1), the reflecting surface of the two sides of Ho:YAG crystal (2), the second total reflective mirror (10) and the reflecting surface of the 3rd total reflective mirror (11) all are coated with LD pump light transmitance are greater than to 99.5% and the oscillation light reflectivity deielectric-coating that is greater than 99.7%.
5. according to 2.09 microns solid state lasers of claim 1,2 or 3 described a kind of pulse single-frequency operations, it is characterized in that, the annular chamber physical length that 2 μ m output coupling mirrors (13), the one 2 μ m total reflective mirror (14), Ho:YAG crystal (15), the 22 μ m total reflective mirror (16), the 32 μ m total reflective mirror (17) and acousto-optic adjusting Q crystal (18) form is 2.8m.
6. according to 2.09 microns solid state lasers of claim 1,2 or 3 described a kind of pulse single-frequency operations, it is characterized in that, output coupling mirror (6) is 2% to the transmitance of concussion light, and the plane of incidence of output coupling mirror (6) is coated with the deielectric-coating that LD pump light transmitance is greater than 99.5%.
7. according to 2.09 microns solid state lasers of claim 1,2 or 3 described a kind of pulse single-frequency operations, it is characterized in that, the plano-concave mirror that 2 μ m output coupling mirrors (13) are 1000mm for radius of curvature, the deielectric-coating that it is 18% that the concave surface of 2 μ m output coupling mirrors (13) is coated with the oscillation light transmitance.
8. according to 2.09 microns solid state lasers of claim 1,2 or 3 described a kind of pulse single-frequency operations, it is characterized in that, the reflecting surface of the one 2 μ m total reflective mirror (14), the reflecting surface of the 22 μ m total reflective mirror (16) and the 32 μ m total reflective mirror (17) concave surface all are coated with LD pump light transmitance are greater than to 99.5% and the oscillation light reflectivity deielectric-coating that is greater than 99.7%.
9. according to 2.09 microns solid state lasers of claim 1,2 or 3 described a kind of pulse single-frequency operations, it is characterized in that the plano-concave mirror that the 32 μ m total reflective mirror (17) is 1000mm for radius of curvature.
10. according to 2.09 microns solid state lasers of claim 1,2 or 3 described a kind of pulse single-frequency operations, it is characterized in that, the wavelength of laser diode (22) is 785nm.
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Cited By (6)
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| CN104022438A (en) * | 2014-06-25 | 2014-09-03 | 哈尔滨工业大学 | 2-micron pulse single-frequency laser device based on Tm:YAG ceramic material |
| CN104158083A (en) * | 2014-09-10 | 2014-11-19 | 哈尔滨工业大学 | Single-doped Ho:YAG tunable single longitudinal mode laser on basis of torsional mode technology |
| CN104158084A (en) * | 2014-09-10 | 2014-11-19 | 哈尔滨工业大学 | Single-doped Ho:YAG single longitudinal mode laser transmitting device on basis of F-P (Fabry-Perot) etalon |
| CN109950778A (en) * | 2019-03-29 | 2019-06-28 | 中国空间技术研究院 | A kind of end pumping injection locking pure-tone pulse slab laser device |
| CN113540944A (en) * | 2021-07-19 | 2021-10-22 | 哈尔滨工业大学 | 2.1-micrometer waveband single-pulse self-starting polarization-maintaining 9-shaped cavity mode-locking holmium-doped fiber laser |
| CN114122879A (en) * | 2022-01-25 | 2022-03-01 | 中国工程物理研究院激光聚变研究中心 | Self-injection single longitudinal mode Q-switched laser |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104022438A (en) * | 2014-06-25 | 2014-09-03 | 哈尔滨工业大学 | 2-micron pulse single-frequency laser device based on Tm:YAG ceramic material |
| CN104158083A (en) * | 2014-09-10 | 2014-11-19 | 哈尔滨工业大学 | Single-doped Ho:YAG tunable single longitudinal mode laser on basis of torsional mode technology |
| CN104158084A (en) * | 2014-09-10 | 2014-11-19 | 哈尔滨工业大学 | Single-doped Ho:YAG single longitudinal mode laser transmitting device on basis of F-P (Fabry-Perot) etalon |
| CN109950778A (en) * | 2019-03-29 | 2019-06-28 | 中国空间技术研究院 | A kind of end pumping injection locking pure-tone pulse slab laser device |
| CN113540944A (en) * | 2021-07-19 | 2021-10-22 | 哈尔滨工业大学 | 2.1-micrometer waveband single-pulse self-starting polarization-maintaining 9-shaped cavity mode-locking holmium-doped fiber laser |
| CN114122879A (en) * | 2022-01-25 | 2022-03-01 | 中国工程物理研究院激光聚变研究中心 | Self-injection single longitudinal mode Q-switched laser |
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Application publication date: 20140108 |