CN100373713C - High power full solid 455nm pulsed laser in narrow line width - Google Patents
High power full solid 455nm pulsed laser in narrow line width Download PDFInfo
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- CN100373713C CN100373713C CNB2006100284259A CN200610028425A CN100373713C CN 100373713 C CN100373713 C CN 100373713C CN B2006100284259 A CNB2006100284259 A CN B2006100284259A CN 200610028425 A CN200610028425 A CN 200610028425A CN 100373713 C CN100373713 C CN 100373713C
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- precious stone
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- 239000007787 solid Substances 0.000 title claims description 12
- 239000013078 crystal Substances 0.000 claims abstract description 50
- 238000007493 shaping process Methods 0.000 claims abstract description 17
- 238000005086 pumping Methods 0.000 claims abstract description 13
- 239000010936 titanium Substances 0.000 claims description 54
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 53
- 229910052719 titanium Inorganic materials 0.000 claims description 53
- 239000010437 gem Substances 0.000 claims description 52
- 229910001751 gemstone Inorganic materials 0.000 claims description 52
- 230000003287 optical effect Effects 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000004891 communication Methods 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 238000002347 injection Methods 0.000 abstract 2
- 239000007924 injection Substances 0.000 abstract 2
- 238000012544 monitoring process Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052792 caesium Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229910000160 potassium phosphate Inorganic materials 0.000 description 1
- 235000011009 potassium phosphates Nutrition 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- RIUWBIIVUYSTCN-UHFFFAOYSA-N trilithium borate Chemical class [Li+].[Li+].[Li+].[O-]B([O-])[O-] RIUWBIIVUYSTCN-UHFFFAOYSA-N 0.000 description 1
Abstract
The present invention relates to a full solid-state pulse 455 nm laser with high power and narrow linewidth of a difference absorption radar, which is applicable to underwater target communication and the current monitoring of atmospheric conditions. The present invention is characterized in that the laser is orderly composed of a pulse Q-switched laser device, a frequency doubling crystal, a pumping light beam shaping and coupling system, a Ti gem laser resonant cavity and a frequency doubling crystal of the Ti gem laser in the advance direction of the light beam, wherein output seed laser of an injection system of outer cavity seed laser is injected into the Ti gem laser resonant cavity; 1064 nm laser output by the pulse Q-switched laser device passes through the frequency doubling crystal and obtains 532 nm laser output. The 532 nm laser passes through the pumping light beam shaping and coupling system and enters the Ti gem laser resonant cavity. The linewidth of the output laser of the Ti gem laser resonant cavity is controlled by the injection system of the outer cavity seed. Laser 910 nm output by the Ti gem laser system obtains pulse 455 nm laser output after the laser 910 nm passes through the frequency doubling crystal of the Ti gem laser. The laser has the characteristics of compact structure, small volume, high efficiency, long service life and stable work.
Description
Technical field
The present invention relates to all solid state laser, particularly high power narrow linewidth complete solid state pulse 455nm laser in.
Background technology
Bluish-green wave band is the seawater window, so bluish-green laser is communicated by letter under water, application potential is big in the marine exploration.At present under water in the laser communications, in order to reduce sun background, wish transmitting illuminant wavelength can with the corresponding 455nm of caesium Cs atom filtering device, and the beam quality of laser, energy requirement is all than higher.Laser to submarine target communication and differential absorption lidar in, do not only require the stable efficient intensity laser output of the wavelength that obtains to meet the requirements, and require the beam divergence angle of LASER Light Source should be as far as possible little, could increase the transmission range of laser like this, reduce the decay in atmosphere and seawater channel as far as possible.Simultaneously, require the laser facula should be even as far as possible, this be related to the receiving sensitivity of communication system.
Obtain the output of the reliable 455nm laser of efficient stable, can use the first-harmonic of Cr:LiSAF laser output to carry out optical frequency conversion, but the current diode cost that is used for this crystal of pumping is than higher, power output is limited, and efficient is lower.In DIAL (DIAL) system, people are normally used to be titanium gem crystal (Ti:sapphire) at present.Titanium gem crystal has good physics and optical characteristics and the wideest lasers range.The tunable range of ti sapphire laser is 700nm ~ 1050nm, can obtain best bluish-green laser output after the nonlinear optical frequency conversion process.In actual applications, not only require the energy of output 455nm laser, pulsewidth etc. meet the requirements, and the stability of whole system and efficient wants high, are easy to regulate.Many researchers adopts the method with titanium precious stone laser and 1064nm laser and frequency to obtain blue laser output.The method of using and obtaining blue light frequently need guarantee to produce and frequently two lasers of required laser send the synchronism of pulse, the systematic comparison complexity, regulates loaded down with trivial details, poor stability, and general and frequency efficient is lower.
Summary of the invention
The present invention provides a kind of high power narrow linewidth complete solid state pulse 455nm laser in order to overcome above-mentioned the deficiencies in the prior art, and this laser should have compact conformation, volume is little, efficient is high, the life-span is long, the characteristics of working stability.
The technology of the present invention solution is:
A kind of high power narrow linewidth complete solid state pulse 455nm laser, it is characterized in that constituting: along the light beam direction of advance be successively: pulse tuning Q laser, frequency-doubling crystal, pump beam shaping and coupled system, the frequency-doubling crystal of titanium precious stone laser resonant cavity and titanium precious stone laser, the seed laser of the output of one exocoel seed laser injected system injects described titanium precious stone laser resonant cavity, the 1064nm laser of described pulse tuning Q laser output obtains the output of 532nm laser by frequency-doubling crystal, this 532nm laser enters described titanium precious stone laser resonant cavity by pump beam shaping and coupled system again, the live width of exocoel seed injected system control titanium precious stone laser resonant cavity output laser, the laser 910nm of titanium precious stone laser resonant cavity output is by obtaining the output of pulse 455nm laser behind the frequency-doubling crystal of titanium precious stone laser.
Described titanium precious stone laser resonant cavity has four mirror ring cavity structures of an intersection for its light path, and four chamber mirrors all are level crossing, resonant cavity is long to be 1600m, in described titanium precious stone laser resonant cavity, used two titanium gem crystal series connection that are placed on the water cooled holder to be placed in the light path, the titanium gem crystal central axis is perpendicular to crystallographic axis, two logical light end faces cut with Brewster's angle, and the normal and the crystallographic axis of two logical optical surfaces are in the same plane, and pump light becomes 60.4 ° of angles with the normal of logical optical surface.
Described pump beam shaping and coupled system are made of telescopic system, spectroscope and two total reflective mirrors, by the pump light of frequency-doubling crystal output after the telescopic system shaping, by the spectroscope beam split, then by described two total reflective mirrors reflection, described two titanium gem crystals are carried out both-end pumping, guarantee that pump energy density is lower than the damage threshold of crystal.
The present invention has the following advantages:
1, utilizes the gain waveguide effect of titanium jewel, designed four four mirror ring cavity structures that the chamber mirror all is a level crossing, can obtain high efficiency titanium precious stone laser output.If increase the energy of pump light simultaneously, only need to guarantee that facula area is enough big, can not surpass the crystal damage threshold value, just can obtain more high-power laser output.Needn't consider the coupled problem of pump light and oscillation light.That is to say that if improve pumping light power, this system can further improve power output.
2, the titanium precious stone laser resonant cavity output beam quality height of Shi Yonging adopts the exocoel seed to inject simultaneously, makes laser rays width, guaranteed the high efficiency of next step frequency multiplication process, final simultaneously narrow linewidth, the narrow pulsewidth of obtaining, the 455nm laser of high light beam quality satisfies the needs of practical application.
3, owing to adopted the 910nm laser to ti sapphire laser output to carry out the scheme that frequency multiplication obtains 455nm laser, finally this system configuration is simply compact, and efficient is higher, and working stability is easy to regulate.
The present invention is described further below in conjunction with accompanying drawing and embodiment.
Description of drawings
Fig. 1 is the The general frame of high power narrow linewidth complete solid state pulse 455nm laser of the present invention.
Fig. 2 is titanium precious stone laser resonant cavity of the present invention and pump light shaping and coupled system structural representation.
Embodiment
See also Fig. 1 and Fig. 2, Fig. 1 is the The general frame of high power narrow linewidth complete solid state pulse 455nm laser of the present invention.Fig. 2 is titanium precious stone laser resonant cavity of the present invention and pump light shaping and coupled system structural representation.As seen from the figure, constituting of high power narrow linewidth complete solid state pulse 455nm laser of the present invention: be successively: pulse tuning Q laser 1 along the light beam direction of advance, frequency-doubling crystal 2, pump beam shaping and coupled system 3, the frequency-doubling crystal 6 of titanium precious stone laser resonant cavity 4 and titanium precious stone laser, described titanium precious stone laser resonant cavity 4 is injected in the laser output of one exocoel seed laser injected system 5, the 1064nm laser of laser 1 output of described pulse tuning Q obtains the output of 532nm laser by frequency-doubling crystal 2, this 532nm laser enters described titanium precious stone laser resonant cavity 4 by pump light shaping and coupled system 3 again, the live width of the laser controlling titanium precious stone laser resonant cavity 4 output laser that exocoel seed injected system 5 is injected, the laser 910nm of titanium sapphire laser system 4 outputs obtains the output of pulse 455nm laser by frequency-doubling crystal 6 backs of titanium precious stone laser.
Described titanium precious stone laser resonant cavity 4 has four mirror ring cavity structures of an intersection for its light path, and four chamber mirrors 401,402,403,404 all are level crossing, resonant cavity is long to be 1600mm, in described titanium precious stone laser resonant cavity 4, used two titanium gem crystals 405 and 406 series connection that are placed on the water cooled holder to be placed in the light path, the titanium gem crystal central axis is perpendicular to crystallographic axis c, two logical light end faces cut with Brewster's angle, and the normal and the crystallographic axis c of two logical optical surfaces are in the same plane, and pump light becomes 60.4 ° of angles with the normal of logical optical surface.
Described pump beam shaping and coupled system 3 are made of telescopic system 301, spectroscope 302 and two total reflective mirrors 303,304, by the pump light of frequency-doubling crystal 2 output after telescopic system 301 shapings, by spectroscope 302 beam split, then by two total reflective mirrors 303 and 304 reflections, described two titanium gem crystals 405 and 406 are carried out both-end pumping, guarantee that pump energy density is lower than the damage threshold of crystal.
The present invention adopts four mirrors annulars titanium precious stone laser resonant cavity, and four chamber mirrors be level crossing all, and the resonant cavity of having chosen 1600mm is long, under the prerequisite of the enough laser output powers of assurance, has guaranteed output laser pulse width 17ns, satisfies instructions for use.
Used in the described titanium precious stone laser resonant cavity by two crystal series connection of water cooling plant cooling and placed, the titanium gem crystal central axis is perpendicular to crystallographic axis (c), two logical light end faces cut with Brewster's angle, and the normal and the crystallographic axis (c) of two logical optical surfaces are in the same plane, and pump light becomes 60.4 ° of angles with the normal of logical optical surface.Utilize the gain waveguide effect of titanium gem crystal, can make full use of active medium, guarantee enough power outputs; After the shaping of pump light process telescopic system, two crystal are carried out both-end pumping, guarantee that pump energy density is lower than the damage threshold of crystal.
Used two crystal series connection that are placed on the water cooled holder to place in the described titanium precious stone laser resonant cavity.To crystal effectively cool off and adopt two identical crystal series connection place and when opposite direction is carried out pumping and can be effectively reduced and remedy system's operation the thermal lensing effect of crystal, guarantee the laser output of efficient stable.
Inject the 910nm laser output that has obtained narrow linewidth by the titanium precious stone laser resonant cavity being carried out the exocoel seed, guaranteed the narrow linewidth of final output laser.
The frequency-doubling crystal of described titanium precious stone laser carries out frequency multiplication with the 910nm laser of titanium precious stone laser resonant cavity output, working stability, and efficient is higher.
The concrete parameter of a specific embodiment of following the present invention:
Pumping is exported energy 2000mJ, repetition rate 10Hz, the about 8ns of pulsewidth with 1064nm laser output pulse.Use KTP (KTiP04, i.e. titanyl potassium phosphate) crystal double frequency, obtain 532nm green light pulse energy 1000mJ.Two block specifications are that upper laser level life-span τ is placed in the titanium gem crystal series connection of φ 10 * 20mm
0=3.2 μ s, crystal is to the absorption coefficient=1.0cm of pump light
-1, quantum efficiency 90%, doping content N0=3.33 * 10
19Cm
-3After the spot size that is fit to that pump light is adjusted by pumping coupling system from two face pumping crystal.Resonant cavity adopts four mirror annular chambers, and four chamber mirrors all are level crossing, the long L=1600mm in chamber.Using the 910nm single longitudinal mode laser to carry out the exocoel seed as seed light source injects.Rate equation analysis according to the four-level laser system is calculated, can draw, when energy is the 532nm green glow pumping of 1000mJ, can obtain this moment resonant cavity can export 212.3mJ, pulsewidth be 17.0ns 910nm pulse laser output, the Best Coupling output rating of outgoing mirror is 48.1%.Resonant cavity output laser uses LBO (LiB
3O
5, i.e. three lithium borates) and crystal double frequency, obtain the 455nm laser output that pulse energy surpasses 100mJ.
In sum, the present invention has compact conformation, volume is little, efficient is high, the life-span is long, the characteristics such as working stability, Be particularly suitable for being installed in ground and the space mobile device, in space technology, atmosphere pollution detection and military field In have wide practical use.
Claims (3)
1. high power narrow linewidth complete solid state pulse 455nm laser, it is characterized in that constituting: be successively: pulse tuning Q laser (1) along the light beam direction of advance, frequency-doubling crystal (2), pump beam shaping and coupled system (3), the frequency-doubling crystal (6) of titanium precious stone laser resonant cavity (4) and titanium precious stone laser, the output laser of one exocoel seed laser injected system (5) injects described titanium precious stone laser resonant cavity (4), the 1064nm laser of described pulse tuning Q laser (1) output obtains the output of 532nm laser by frequency-doubling crystal (2), this 532nm laser enters described titanium precious stone laser resonant cavity (4) by pump beam shaping and coupled system (3) again, the live width of exocoel seed injected system (5) control titanium precious stone laser resonant cavity (4) output laser, the laser 910nm of titanium precious stone laser resonant cavity (4) output obtains the output of pulse 455nm laser by frequency-doubling crystal (6) back of titanium precious stone laser.
2. complete solid state pulse 455nm laser according to claim 1, it is characterized in that described titanium precious stone laser resonant cavity (4) has four mirror ring cavity structures of an intersection for its light path, and four chamber mirrors (401,402,403,404) all be level crossing, resonant cavity is long to be 1600mm, two titanium gem crystals (405) that are placed on the water cooled holder in described titanium precious stone laser resonant cavity (4), have been used, (406) series connection is placed, the titanium gem crystal central axis is perpendicular to crystallographic axis (c), two logical light end faces cut with Brewster's angle, and the normal and the crystallographic axis (c) of two logical optical surfaces are in the same plane, and pump light becomes 60.4 ° of angles with the normal of logical optical surface.
3. complete solid state pulse 455nm laser according to claim 1, it is characterized in that described pump beam shaping and coupled system (3) are made of telescopic system (301), (302) two total reflective mirrors of spectroscope (303,304), by the pump light of frequency-doubling crystal (2) output after telescopic system (301) shaping, by spectroscope (302) beam split, reflect by two total reflective mirrors (303,304) then, to described two titanium gem crystals (405), (406) carry out both-end pumping, guarantee that pump energy density is lower than the damage threshold of crystal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100284259A CN100373713C (en) | 2006-06-30 | 2006-06-30 | High power full solid 455nm pulsed laser in narrow line width |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100284259A CN100373713C (en) | 2006-06-30 | 2006-06-30 | High power full solid 455nm pulsed laser in narrow line width |
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| Publication Number | Publication Date |
|---|---|
| CN1874083A CN1874083A (en) | 2006-12-06 |
| CN100373713C true CN100373713C (en) | 2008-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100284259A Active CN100373713C (en) | 2006-06-30 | 2006-06-30 | High power full solid 455nm pulsed laser in narrow line width |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5363388A (en) * | 1991-10-18 | 1994-11-08 | Cedars-Sinai Medical Center | Continuously tunable solid state ultraviolet coherent light source |
| US6185231B1 (en) * | 1999-02-02 | 2001-02-06 | University Of Central Florida | Yb-doped:YCOB laser |
| US6714567B2 (en) * | 2000-09-21 | 2004-03-30 | Sony Corporation | Laser light generating apparatus and optical apparatus using the same |
| CN1545172A (en) * | 2003-11-14 | 2004-11-10 | 中国科学院上海光学精密机械研究所 | Table type fully solidified high repetition frequency femtosecond laser |
-
2006
- 2006-06-30 CN CNB2006100284259A patent/CN100373713C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5363388A (en) * | 1991-10-18 | 1994-11-08 | Cedars-Sinai Medical Center | Continuously tunable solid state ultraviolet coherent light source |
| US6185231B1 (en) * | 1999-02-02 | 2001-02-06 | University Of Central Florida | Yb-doped:YCOB laser |
| US6714567B2 (en) * | 2000-09-21 | 2004-03-30 | Sony Corporation | Laser light generating apparatus and optical apparatus using the same |
| CN1545172A (en) * | 2003-11-14 | 2004-11-10 | 中国科学院上海光学精密机械研究所 | Table type fully solidified high repetition frequency femtosecond laser |
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| Publication number | Publication date |
|---|---|
| CN1874083A (en) | 2006-12-06 |
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Owner name: HEFEI ZHICHANG PHOTOELECTRIC TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: SHANGHAI OPTICAL PRECISION MACHINERY INST., CHINESE ACADEMY OF SCIENCES Effective date: 20120808 |
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Free format text: CORRECT: ADDRESS; FROM: 201800 JIADING, SHANGHAI TO: 230031 HEFEI, ANHUI PROVINCE |
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Effective date of registration: 20120808 Address after: 230031, building 208, building C4, anime base, 800 Wangjiang West Road, hi tech Zone, Anhui, Hefei Patentee after: Hefei Zhichang Photoelectric Technology Co.,Ltd. Address before: 201800 Shanghai 800-211 post office box Patentee before: Shanghai Optical Precision Machinery Inst., Chinese Academy of Sciences |