CN104022438A - 2-micron pulse single-frequency laser device based on Tm:YAG ceramic material - Google Patents
2-micron pulse single-frequency laser device based on Tm:YAG ceramic material Download PDFInfo
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- CN104022438A CN104022438A CN201410293120.5A CN201410293120A CN104022438A CN 104022438 A CN104022438 A CN 104022438A CN 201410293120 A CN201410293120 A CN 201410293120A CN 104022438 A CN104022438 A CN 104022438A
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Abstract
The invention discloses a 2-micron pulse single-frequency laser device based on a Tm:YAG ceramic material, relates to a laser device, and is used for solving the problems of low laser output efficiency and single pulse energy of a current laser device utilizing a Tm/Ho doped single crystal material. The laser device comprises a Tm:YAG ceramic seed laser, a coupled system, a Tm:YAG ceramic pulse laser and an injection and frequency-locking servo system, wherein seed lights output by the Tm:YAG ceramic seed laser are incident to the coupled system, the lights penetrating the coupled system are incident to the Tm:YAG ceramic pulse laser, and the Tm:YAG ceramic pulse laser is driven and controlled by the injection and frequency-locking servo system to output 2-micron pulse single-frequency laser. The laser device is applied to high-performance laser emission sources of laser radars.
Description
Technical field
The present invention relates to a kind of laser, particularly a kind of 2 microns of pulse single frequency lasers based on Tm:YAG ceramic material.
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 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, is more conducive to increase the measuring distance of laser radar.2 μ m solid-state laser apparatus of laser diode (laser diode, LD) pump-coupling have advantages of compact conformation, stable performance and are easy to maintenance etc., are very suitable for practical application.At present, utilize LD Pumped Tm Ho doped single crystal material be the main path that realizes 2 mu m waveband lasers outputs, mainly comprise: LD pumping list in (1) 800nm left and right is mixed Tm monocrystal material; (2) 1.9 μ m left and right LD pumping lists are mixed Ho monocrystal material; (3) 800nm left and right LD Pumped Tm, the two monocrystal materials of mixing of Ho.Adopt Tm Ho doped single crystal material can obtain 2 mu m waveband lasers outputs, but Tm the Ho doped single crystal Material growth cycle long, doping content is low, thereby has limited 2 efficiency of μ m laser aid and the single pulse energy of its Output of laser.
Summary of the invention
The object of the invention is for solve current employing Tm efficiency and the low problem of single pulse energy of laser Output of laser of Ho doped single crystal material, the invention provides a kind of 2 microns of pulse single frequency lasers based on Tm:YAG ceramic material.
2 microns of pulse single frequency lasers based on Tm:YAG ceramic material of the present invention,
It comprises Tm:YAG pottery seed laser, coupled system, Tm:YAG pottery pulse laser and injects frequency locking servo system;
Tm:YAG pottery seed laser comprises the first total reflective mirror, a Tm:YAG ceramic crystal, polarizing component, the first wavelength tuned cell, second wave length tuned cell and output coupling mirror;
LD pump light is incident to the first total reflective mirror, light through the first total reflective mirror transmission is incident to a Tm:YAG ceramic crystal, light through a Tm:YAG ceramic crystal transmission is incident to polarizing component, light through polarizing component transmission is incident to the first wavelength tuned cell, light through the first wavelength tuned cell transmission is incident to second wave length tuned cell, light through the transmission of second wave length tuned cell is incident to output coupling mirror, through the light of output coupling mirror transmission, is incident to coupled system;
Coupled system comprises the first transform lens, 1/2nd wave plates, optics isolated component, the second total reflective mirror, the 3rd total reflective mirror and the second transform lens;
Seed light through output coupling mirror transmission is incident to the first transform lens, seed light through the first transform lens transmission is incident to 1/2nd wave plates, seed light through 1/2nd wave plate transmissions is incident to optics isolated component, seed light through the transmission of optics isolated component is incident to the second total reflective mirror, seed light through the second total reflective mirror transmission is incident to the 3rd total reflective mirror, seed light through the 3rd total reflective mirror transmission is incident to the second transform lens, through the seed light of the second transform lens transmission, is incident to Tm:YAG pottery pulse laser;
Tm:YAG pottery pulse laser comprises 2 μ m output coupling mirrors, the one 2 μ m total reflective mirror, the 2nd Tm:YAG ceramic crystal, the 22 μ m total reflective mirror, the 32 μ m total reflective mirror and acousto-optic adjusting Q crystal;
Seed light through the second transform lens transmission is incident to 2 μ m output coupling mirrors, through the light of 2 μ m output coupling mirror transmissions, is incident to the one 2 μ m total reflective mirror, through the light of the one 2 μ m total reflective mirror total reflection, is incident to the 2nd Tm:YAG ceramic crystal;
Pump light is incident to the one 2 μ m total reflective mirror, light through the one 2 μ m total reflective mirror transmission is incident to the 2nd Tm:YAG ceramic crystal, light through the 2nd Tm:YAG ceramic crystal transmission is incident to the 22 μ m total reflective mirror, light through the 22 μ m total reflective mirror reflection is incident to the 32 μ m total reflective mirror, light through the 32 μ m total reflective mirror reflection is incident to acousto-optic Q modulation crystal, light through the transmission of acousto-optic Q modulation crystal is incident to 2 μ m output coupling mirrors, light through 2 μ m output coupling mirror transmissions is 2 microns of pulse single-frequency lasers of 2 microns of pulse single frequency laser outputs based on Tm:YAG ceramic material, inject frequency locking servo system and comprise piezoelectric ceramic, Infrared Detectors and electricity servo system,
Piezoelectric Ceramic the 32 μ m total reflective mirror carries out resonance scanning,
Infrared Detectors is surveyed the resonance intensity of the light of the 32 μ m total reflective mirror transmission, the optical resonance intensity signal of telecommunication of Infrared Detectors output inputs to electricity servo system, the control signal of electricity servo system output inputs to acousto-optic Q modulation crystal, and the driving signal of electricity servo system output inputs to piezoelectric ceramic.
Beneficial effect of the present invention is, the present invention selects Tm:YAG ceramic material as laser working medium, use seed light injection locking technique, realize the needed pure-tone pulse 2 μ m Laser outputs of laser radar system, improve 2 μ m laser aid efficiency and single pulse energies.Of the present inventionly accomplish all solid state and miniaturization, single-frequency, stable pulse laser output.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the 2 microns of pulse single frequency lasers based on Tm:YAG ceramic material described in embodiment one.
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1,2 microns of pulse single frequency lasers based on Tm:YAG ceramic material described in present embodiment, it comprises Tm:YAG pottery seed laser, coupled system, Tm:YAG pottery pulse laser and injects frequency locking servo system;
Tm:YAG pottery seed laser comprises the first total reflective mirror 1, a Tm:YAG ceramic crystal 2, polarizing component 3, the first wavelength tuned cell 4, second wave length tuned cell 5 and output coupling mirror 6;
LD pump light is incident to the first total reflective mirror 1, light through the first total reflective mirror 1 transmission is incident to a Tm:YAG ceramic crystal 2, light through Tm:YAG ceramic crystal 2 transmissions is incident to polarizing component 3, light through polarizing component 3 transmissions is incident to the first wavelength tuned cell 4, light through the first wavelength tuned cell 4 transmissions is incident to second wave length tuned cell 5, light through 5 transmissions of second wave length tuned cell is incident to output coupling mirror 6, through the light of output coupling mirror 6 transmissions, is incident to coupled system;
Coupled system comprises the first 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 the second transform lens 12;
Seed light through output coupling mirror 6 transmissions is incident to the first transform lens 7, seed light through the first transform lens 7 transmissions is incident to 1/2nd wave plates 8, seed light through 1/2nd wave plate 8 transmissions is incident to optics isolated component 9, seed light through 9 transmissions of optics isolated component is incident to the second total reflective mirror 10, seed light through the second total reflective mirror 10 transmissions is incident to the 3rd total reflective mirror 11, seed light through the 3rd total reflective mirror 11 transmissions is incident to the second transform lens 12, through the seed light of the second transform lens 12 transmissions, is incident to Tm:YAG pottery pulse laser;
Tm:YAG pottery pulse laser comprises 2 μ m output coupling mirror the 13, the 1 μ m total reflective mirrors 14, the 2nd Tm:YAG ceramic 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;
Seed light through the second transform lens 12 transmissions is incident to 2 μ m output coupling mirrors 13, through the light of 2 μ m output coupling mirror 13 transmissions, is incident to the one 2 μ m total reflective mirror 14, through the light of the one 2 μ m total reflective mirror 14 total reflections, is incident to the 2nd Tm:YAG ceramic crystal 15;
Pump light is incident to the one 2 μ m total reflective mirror 14, light through the one 2 μ m total reflective mirror 14 transmissions is incident to the 2nd Tm:YAG ceramic crystal 15, light through the 2nd Tm:YAG ceramic crystal 15 transmissions is incident to the 22 μ m total reflective mirror 16, light through the 22 μ m total reflective mirror 16 reflections is incident to the 32 μ m total reflective mirror 17, light through the 32 μ m total reflective mirror 17 reflections is incident to acousto-optic Q modulation crystal 18, light through 18 transmissions of acousto-optic Q modulation crystal is incident to 2 μ m output coupling mirrors 13, light through 2 μ m output coupling mirror 13 transmissions is 2 microns of pulse single-frequency lasers of 2 microns of pulse single frequency laser outputs based on Tm:YAG ceramic material,
Inject frequency locking servo system and comprise piezoelectric ceramic 19, Infrared Detectors 20 and electricity servo system 21;
Piezoelectric ceramic 19 drives the 32 μ m total reflective mirror 17 to carry out resonance scanning,
Infrared Detectors 20 is surveyed the resonance intensity of the light of the 32 μ m total reflective mirror 17 transmissions, the optical resonance intensity signal of telecommunication of Infrared Detectors 20 outputs inputs to electricity servo system 21, the control signal of electricity servo system 21 outputs inputs to acousto-optic Q modulation crystal 18, and the driving signal of electricity servo system 21 outputs inputs to piezoelectric ceramic 19.
Injection frequency locking servo system in present embodiment is for controlling the single-frequency output of Tm:YAG pottery pulse laser;
Polarizing component 3 guarantees that Tm:YAG pottery seed laser Output of laser is linear polarization, and the first wavelength tuned cell 4 and second wave length tuned cell 5 restricted T m:YAG pottery seed laser Output of lasers are single longitudinal mode.
In present embodiment, 2 the 3rd μ m total reflective mirrors 17 stick on piezoelectric ceramic 19, after Infrared Detectors 20 is placed in 2 μ m total reflective mirrors 17, piezoelectric ceramic 19 drives the 32 μ m total reflective mirror 17 to carry out resonance scanning, with Infrared Detectors 20, survey from the optical resonance intensity of the 32 μ m total reflective mirror 17 transmissions and be converted to the signal of telecommunication, the signal of telecommunication of acquisition is sent to electricity servo system 21 simultaneously, electricity servo system 21 to its carry out necessary amplification ratio compared with shaping after, send control signal to acousto-optic Q modulation crystal 18, finally realize the laser generation of Tm:YAG pottery pure-tone pulse, from output coupling mirror 13 outputs.
Embodiment two: present embodiment is the further restriction to the 2 microns of pulse single frequency lasers based on Tm:YAG ceramic material described in embodiment one, the first total reflective mirror 1, the second total reflective mirror 10, the 3rd total reflective mirror the 11, the 1 μ m total reflective mirror the 14, the 22 μ m total reflective mirror 16 and the 32 μ m total reflective mirror 17 are all coated with the high saturating and high anti-deielectric-coating of oscillation light of LD pump light;
Output coupling mirror 6 is coated with LD pump light height thoroughly and the deielectric-coating of oscillation light part transmission;
The deielectric-coating that 2 μ m output coupling mirrors 13 are coated with the transmission of oscillation light part;
The two sides of the one Tm:YAG ceramic crystal 2 and the 2nd Tm:YAG ceramic crystal 15 is all coated with the high saturating and high deielectric-coating of oscillation light of LD pump light.
Embodiment three: present embodiment is the further restriction to the 2 microns of pulse single frequency lasers based on Tm:YAG ceramic material described in embodiment one, and the transmitance of output coupling mirror 6 is 2%.
Embodiment four: present embodiment is the further restriction to the 2 microns of pulse single frequency lasers based on Tm:YAG ceramic material described in embodiment one, and the 32 μ m total reflective mirror 17 is the plano-concave mirror of radius of curvature 1000mm.
Embodiment five: present embodiment is the further restriction to the 2 microns of pulse single frequency lasers based on Tm:YAG ceramic material described in embodiment one, and 2 μ m output coupling mirrors 13 are the plano-concave mirror of radius of curvature 1000mm, and transmitance is 4%.
Embodiment six: present embodiment is the further restriction to the 2 microns of pulse single frequency lasers based on Tm:YAG ceramic material described in embodiment one, the repetition rate 100Hz of acousto-optic Q modulation crystal 18.
In present embodiment, while adjusting Q repetition rate 100Hz, obtain the 2013nm pure-tone pulse Laser output that single pulse energy reaches 2mJ, pulse duration is 150ns.
Embodiment seven: present embodiment is the further restriction to the 2 microns of pulse single frequency lasers based on Tm:YAG ceramic material described in embodiment one, the physical length of the resonant cavity of described Tm:YAG pottery pulse laser is 0.4m.
Claims (7)
1. 2 microns of pulse single frequency lasers based on Tm:YAG ceramic material, is characterized in that, it comprises Tm:YAG pottery seed laser, coupled system, Tm:YAG pottery pulse laser and injects frequency locking servo system;
Tm:YAG pottery seed laser comprises the first total reflective mirror (1), a Tm:YAG ceramic crystal (2), polarizing component (3), the first wavelength tuned cell (4), second wave length tuned cell (5) and output coupling mirror (6);
LD pump light is incident to the first total reflective mirror (1), light through the first total reflective mirror (1) transmission is incident to a Tm:YAG ceramic crystal (2), light through Tm:YAG ceramic crystal (2) transmission is incident to polarizing component (3), light through polarizing component (3) transmission is incident to the first wavelength tuned cell (4), light through the first wavelength tuned cell (4) transmission is incident to second wave length tuned cell (5), light through second wave length tuned cell (5) transmission is incident to output coupling mirror (6), through the light of output coupling mirror (6) transmission, is incident to coupled system;
Coupled system comprises the first 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 the second transform lens (12);
Seed light through output coupling mirror (6) transmission is incident to the first transform lens (7), seed light through the first transform lens (7) transmission is incident to 1/2nd wave plates (8), seed light through 1/2nd wave plates (8) transmission is incident to optics isolated component (9), seed light through optics isolated component (9) transmission is incident to the second total reflective mirror (10), seed light through the second total reflective mirror (10) transmission is incident to the 3rd total reflective mirror (11), seed light through the 3rd total reflective mirror (11) transmission is incident to the second transform lens (12), seed light through the second transform lens (12) transmission is incident to Tm:YAG pottery pulse laser,
Tm:YAG pottery pulse laser comprises 2 μ m output coupling mirrors (13), the one 2 μ m total reflective mirror (14), the 2nd Tm:YAG ceramic 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);
Seed light through the second transform lens (12) transmission is incident to 2 μ m output coupling mirrors (13), light through 2 μ m output coupling mirror (13) transmissions is incident to the one 2 μ m total reflective mirror (14), through the light of the one 2 μ m total reflective mirror (14) total reflection, is incident to the 2nd Tm:YAG ceramic crystal (15);
Pump light is incident to the one 2 μ m total reflective mirror (14), light through the one 2 μ m total reflective mirror (14) transmission is incident to the 2nd Tm:YAG ceramic crystal (15), light through the 2nd Tm:YAG ceramic crystal (15) transmission is incident to the 22 μ m total reflective mirror (16), light through the 22 μ m total reflective mirror (16) reflection is incident to the 32 μ m total reflective mirror (17), light through the 32 μ m total reflective mirror (17) reflection is incident to acousto-optic Q modulation crystal (18), light through acousto-optic Q modulation crystal (18) transmission is incident to 2 μ m output coupling mirrors (13), light through 2 μ m output coupling mirror (13) transmissions is 2 microns of pulse single-frequency lasers of 2 microns of pulse single frequency laser outputs based on Tm:YAG ceramic material,
Inject frequency locking servo system and comprise piezoelectric ceramic (19), Infrared Detectors (20) and electricity servo system (21);
Piezoelectric ceramic (19) drives the 32 μ m total reflective mirror (17) to carry out resonance scanning,
Infrared Detectors (20) is surveyed the resonance intensity of the light of the 32 μ m total reflective mirror (17) transmission, the optical resonance intensity signal of telecommunication of Infrared Detectors (20) output inputs to electricity servo system (21), the control signal of electricity servo system (21) output inputs to acousto-optic Q modulation crystal (18), and the driving signal of electricity servo system (21) output inputs to piezoelectric ceramic (19).
2. 2 microns of pulse single frequency lasers based on Tm:YAG ceramic material according to claim 1, is characterized in that,
The first total reflective mirror (1), the second total reflective mirror (10), the 3rd total reflective mirror (11), the one 2 μ m total reflective mirror (14), the 22 μ m total reflective mirror (16) and the 32 μ m total reflective mirror (17) are all coated with the high saturating and high anti-deielectric-coating of oscillation light of LD pump light;
Output coupling mirror (6) is coated with LD pump light height thoroughly and the deielectric-coating of oscillation light part transmission;
2 μ m output coupling mirrors (13) are coated with the deielectric-coating to the transmission of oscillation light part;
The two sides of the one Tm:YAG ceramic crystal (2) and the 2nd Tm:YAG ceramic crystal (15) is all coated with the high saturating and high deielectric-coating of oscillation light of LD pump light.
3. 2 microns of pulse single frequency lasers based on Tm:YAG ceramic material according to claim 1, is characterized in that,
The transmitance of output coupling mirror (6) is 2%.
4. 2 microns of pulse single frequency lasers based on Tm:YAG ceramic material according to claim 1, is characterized in that,
The 32 μ m total reflective mirror (17) is the plano-concave mirror of radius of curvature 1000mm.
5. 2 microns of pulse single frequency lasers based on Tm:YAG ceramic material according to claim 1, is characterized in that,
2 μ m output coupling mirrors (13) are the plano-concave mirror of radius of curvature 1000mm, and transmitance is 4%.
6. 2 microns of pulse single frequency lasers based on Tm:YAG ceramic material according to claim 1, is characterized in that,
The repetition rate 100Hz of acousto-optic Q modulation crystal (18).
7. 2 microns of pulse single frequency lasers based on Tm:YAG ceramic material according to claim 1, is characterized in that,
The physical length of the resonant cavity of described Tm:YAG pottery pulse laser is 0.4m.
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Citations (5)
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|---|---|---|---|---|
| US20020159495A1 (en) * | 2001-04-30 | 2002-10-31 | Dso National Laboratories | Tm:YAG laser |
| JP2008124389A (en) * | 2006-11-15 | 2008-05-29 | Megaopto Co Ltd | Coherent doppler lidar |
| CN101702487A (en) * | 2009-10-29 | 2010-05-05 | 哈尔滨工程大学 | Wavelength rapid shearing thulium-holmium codoping lithium yttrium fluoride longitudinal mode laser |
| CN103474872A (en) * | 2013-10-14 | 2013-12-25 | 哈尔滨工业大学 | Single longitudinal mould Ho:YAP solid laser generator for pulse operation |
| CN103500920A (en) * | 2013-10-14 | 2014-01-08 | 哈尔滨工业大学 | Pulse single-frequency operating 2.09 micron solid laser |
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2014
- 2014-06-25 CN CN201410293120.5A patent/CN104022438A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020159495A1 (en) * | 2001-04-30 | 2002-10-31 | Dso National Laboratories | Tm:YAG laser |
| JP2008124389A (en) * | 2006-11-15 | 2008-05-29 | Megaopto Co Ltd | Coherent doppler lidar |
| CN101702487A (en) * | 2009-10-29 | 2010-05-05 | 哈尔滨工程大学 | Wavelength rapid shearing thulium-holmium codoping lithium yttrium fluoride longitudinal mode laser |
| CN103474872A (en) * | 2013-10-14 | 2013-12-25 | 哈尔滨工业大学 | Single longitudinal mould Ho:YAP solid laser generator for pulse operation |
| CN103500920A (en) * | 2013-10-14 | 2014-01-08 | 哈尔滨工业大学 | Pulse single-frequency operating 2.09 micron solid laser |
Non-Patent Citations (1)
| Title |
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| 林志峰等: "激光二极管端面抽运Tm:YAG激光器", 《中国激光》, vol. 34, no. 2, 28 February 2007 (2007-02-28) * |
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Application publication date: 20140903 |