CN1494186A - Production method of same light beam double wave length alternating Q laser output - Google Patents
Production method of same light beam double wave length alternating Q laser output Download PDFInfo
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- CN1494186A CN1494186A CNA03152818XA CN03152818A CN1494186A CN 1494186 A CN1494186 A CN 1494186A CN A03152818X A CNA03152818X A CN A03152818XA CN 03152818 A CN03152818 A CN 03152818A CN 1494186 A CN1494186 A CN 1494186A
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Abstract
By using time sharing different voltage applied to crystal H for tuning Q. At one time of pumped pulse, laser is oscillated in a route of sub cavity composed of front cavity mirror A, laser crystal B, polarizer C, crystal H for tuning Q, polarization light splitter I and a set of tunned cell E and back cavity mirror D. At next time of pumped pulse, laser is oscillated in another route of sub cavity composed of front cavity mirror A, laser crystal B, polarizer C, crystal H for tuning Q, polarization light splitter I and a set of tuned cell G and back cavity mirror F. oscillation wavelengths in two routes can be tuned independently so as to output alternant pulse with Q tuned from output cavity mirror in two different wavelengths existed in same light beam. The invented method is applied to differential absorption radar for testing pollution, holographic molecule fluorescence diagnosis, and satellite range measurement.
Description
Technical field
The present invention relates to laser technology field, be specifically related to the production method of dual wavelength Q-switch laser.
Background technology
January nineteen ninety-five, Germany has delivered one piece in " optics and optoelectronics news " remote sensing monograph and has been entitled as the paper (J.P.wolf of " the three-dimensional atmospheric pollution monitoring of vehicle-mounted total solidifying laser radar system ", " 3-Dminitoring of air pollution using mobile All-Solid-State lidarsystem ", optics photonics news, Jan, 1995, P27), disclose the method that a kind of use has the prism rotation of parallel surfaces in the literary composition and realized the method that two wavelength switch, and be used for Difference Absorption and survey dirty system.American National aviation in 1992 and space travel office Langley research center have been delivered one piece and have been entitled as " characteristic of Nd:YAG double-pulse laser system " (J.A.Williams-Byrd et al NASA Langley Reserch Center HamptonVirginia 23665 in the international conference of solid state laser; C, Banziger, rt al, STX Corporation, 28 Reseorch Drive, Hampton, VA23666 " Characterization of a Nd:TAG Doubie Pulsed Laser Systen ", SPIE Vbl, 1627 solid state lasers3 1992, P74) paper has been described the titanium jewel dual laser that is used for DIAL in the literary composition.The photon journal had been published " dual wavelength is mixed chromium lithium fluoride strontium aluminum laser " photon journal VO1.25 such as Ruan Shuangchen in 1996, NO8, and 768 (1996), be with argon laser pumping Cr:LiSAF laser crystal, obtained continuous dual laser output.It is that the direction of propagation is identical and pulsed light beam different wave length spatially separates too that the name that is proposed in March, 1999 by China Science ﹠ Technology University is called " the dipulse dual laser with prism beam splitter ", be not easy to the use of DIAL, in a same flash lamp pumping, the two Q impulse tunable laser of output dual wavelength yet there are no report in the same light beam.
Summary of the invention
The purpose of this invention is to provide a kind of production method that replaces laser output with the light beam dual wavelength, when the pulse of a pumping, obtain one road internal oscillation, obtain a wavelength laser output, another road internal oscillation when pumping next time, obtain another wavelength laser output, its two-way oscillation wavelength can be different, and two pulses are the Q pulse, with light path transmission, intrafascicularly there is dual wavelength to replace laser output thereby reach sharing the same light.
Technical scheme of the present invention is as follows:
A kind of production method that replaces laser output with the light beam dual wavelength, it is characterized in that applying different voltage by timesharing on adjusting Q crystal H, in a pumping, make laser at front cavity mirror A, laser crystal B, polarizer C, adjusting Q crystal H, vibration in the way chamber that polarizing beam splitter I one cover tuned cell E and D Effect of Back-Cavity Mirror are formed, in pumping pulse next time, make laser at front cavity mirror A, laser crystal B, polarizer C, adjusting Q crystal H, vibration in another way chamber that polarizing beam splitter I one cover tuned cell G and F Effect of Back-Cavity Mirror are formed, but its two-way oscillation wavelength independent tuning is alternately exported from front cavity mirror A thereby reach the Q impulse that two different wave lengths are arranged in same light beam.
Front cavity mirror is the output cavity mirror, and polarizing beam splitter I is the film polarizer, Glan prism.
Laser crystal is tunable laser crystal Cr:LiSAF, Cr:LiCAF, Ti
3+: Al
2O
3
The output wavelength of two pulses is independent adjustable in the fluorescence linewidth of laser crystal respectively, to obtaining near the double wavelength and double pulse laser bundle the 900nm, behind harmonic wave, is effective wave band of differential absorption lidar especially.
When a pumping, produce a laser pulse, in pumping next time, obtain another laser pulse, each laser pulse is Q impulse, and its pulse duration is all less than 100ns.
It is at first to add quarter-wave voltage on adjusting Q crystal that the last timesharing of adjusting Q crystal H applies different voltage method, after being in best population inversion in the laser crystal, voltage on the adjusting Q crystal is decorporated, obtain a Q impulse output, before pumping next time, at first add quarter-wave voltage on the adjusting Q crystal, wait be in best population inversion in the laser crystal after, another on adjusting Q crystal be disconnected to add negative quarter-wave voltage.
The placement of the tuned cell of two-way pulse must with the polarization direction of light beam coupling, when a road during as one tunnel output of tuned cell place, tuned cell must be the modes of emplacement of loss minimum in resonant cavity.
Two cover tuning structures of two cover tuned cells (as tuning prism) and Effect of Back-Cavity Mirror composition can be identical, also can be different.
The present invention is at O
3, NO, NO
2, SO
2Etc. the measurement of gas concentration, in the double-wavelength holographic art, research fields such as molecular fluorescence diagnosis, satellite ranging all have important use to be worth.
Description of drawings
Fig. 1 is a structural principle schematic diagram of the present invention.
Fig. 2 is the pressurization schematic diagram of adjusting Q crystal of the present invention.
Embodiment
Referring to Fig. 1,2.
A kind of production method that replaces laser output with the light beam dual wavelength, it is characterized in that tunable laser crystal B, utilize polarizer C, have the crystal H that transfers the Q function and polarization spectroscope I (as the film polarizer, Glan prism) the electric light switching construction of Zu Chenging, in a pumping, make laser at front cavity mirror (being the output cavity mirror) A, laser crystal B, polarizer C, adjusting Q crystal H, polarizing beam splitter I is (as the film polarizer, Glan prism etc.) vibrate in the way chamber that a cover tuned cell E and D Effect of Back-Cavity Mirror are formed, in pumping pulse next time, make laser at front cavity mirror (being the output cavity mirror) A, laser crystal B, polarizer C, adjusting Q crystal H, polarizing beam splitter I is (as the film polarizer, Glan prism etc.) vibrate in another way chamber that a cover tuned cell G and F Effect of Back-Cavity Mirror are formed, but its two-way oscillation wavelength independent tuning is alternately exported from output cavity mirror A thereby reach the Q impulse that two different wave lengths are arranged in same light beam.The laser crystal B that is fit to is that tunable laser crystal is (as Cr:LiSAF, Cr:LiCAF, Ti
3+: Al
2O
3).
Transferring the effect of Q electric-control system 12 is in a pumping, at first add quarter-wave voltage on the adjusting Q crystal, after being in best population inversion in the laser crystal, voltage on the adjusting Q crystal is decorporated, obtain a Q impulse output, before pumping next time, at first add quarter-wave voltage on the adjusting Q crystal, after being in best population inversion in the laser crystal, on adjusting Q crystal another breaks and adds negative quarter-wave voltage, in same light beam, can produce the Q impulse output of another wavelength, its concrete structure is to utilize to have the crystal H that transfers the Q function, polarizer C, polarizing beam splitter I and accent Q electric-control system 12 are formed, polarizer C is the wideband polarization element, if tunable laser crystal B itself has polarization characteristic, polarizer C then can omit, and the electric-control system 12 of adjusting Q crystal offers different regulation and control voltage of adjusting Q crystal H and voltage timing variations, during work, the starting of oscillation of leaning on the change in voltage on the adjusting Q crystal H to come the control chamber inner light beam, failure of oscillation and replace multiwave generation.
Simultaneously, the optical maser wavelength of two-way output is all independent adjustable in the tuning range of laser crystal, and two pulses are the Q pulse, intrafascicularly has dual wavelength alternately to export laser thereby reach sharing the same light.
The output wavelength of two pulses is independent adjustable in the fluorescence linewidth of laser crystal respectively, especially near the dual wavelength that can obtain the 900nm is replaced outgoing laser beam, behind harmonic wave, is effective wave band of differential absorption lidar.
Claims (7)
1, a kind of production method that replaces laser output with the light beam dual wavelength, it is characterized in that applying different voltage by timesharing on adjusting Q crystal H, in a pumping, make laser at front cavity mirror A, laser crystal B, polarizer C, adjusting Q crystal H, polarizing beam splitter I, vibration in the way chamber that one cover tuned cell E and D Effect of Back-Cavity Mirror are formed, in pumping pulse next time, make laser at front cavity mirror A, laser crystal B, polarizer C, adjusting Q crystal H, polarizing beam splitter I, vibration in another way chamber that one cover tuned cell G and F Effect of Back-Cavity Mirror are formed, but its two-way oscillation wavelength independent tuning is alternately exported from front cavity mirror A thereby reach the Q impulse that two different wave lengths are arranged in same light beam.
2, according to claim 1ly replace the production method of laser output with the light beam dual wavelength, it is characterized in that front cavity mirror is the output cavity mirror, polarizing beam splitter I is the film polarizer, Glan prism.
3, according to claim 1ly replace the production method of laser output, it is characterized in that laser crystal is tunable laser crystal Cr:LiSAF, Cr:LiCAF, Ti with the light beam dual wavelength
3+: Al
2O
3
4, the production method that replaces laser output with the light beam dual wavelength according to claim 1, the output wavelength that it is characterized in that two pulses is independent adjustable in the fluorescence linewidth of laser crystal respectively, especially to obtaining near the double wavelength and double pulse laser bundle the 900nm, behind harmonic wave, be effective wave band of differential absorption lidar.
5, the production method that replaces laser output with the light beam dual wavelength according to claim 1, it is characterized in that when a pumping, produce a laser pulse, in pumping next time, obtain another laser pulse, each laser pulse is Q impulse, and its pulse duration is all less than 100ns.
6, the production method that replaces laser output with the light beam dual wavelength according to claim 1, it is characterized in that it is at first to add quarter-wave voltage on adjusting Q crystal that the last timesharing of adjusting Q crystal H applies different voltage method, after being in best population inversion in the laser crystal, voltage on the adjusting Q crystal is decorporated, obtain a Q impulse output, before pumping next time, at first add quarter-wave voltage on the adjusting Q crystal, after being in best population inversion in the laser crystal, another on adjusting Q crystal breaks and adds negative quarter-wave voltage.
7, the production method that replaces laser output with the light beam dual wavelength according to claim 1, the placement that it is characterized in that the tuned cell of two-way pulse must be mated with the polarization direction of light beam, when the tuned cell place a road as 1 tunnel when output, tuned cell must be the modes of emplacement of loss minimum in resonant cavity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03152818 CN1227788C (en) | 2003-08-20 | 2003-08-20 | Production method of same light beam double wave length alternating Q laser output |
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|---|---|---|---|
| CN 03152818 CN1227788C (en) | 2003-08-20 | 2003-08-20 | Production method of same light beam double wave length alternating Q laser output |
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| CN1227788C CN1227788C (en) | 2005-11-16 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244356A (en) * | 2011-05-25 | 2011-11-16 | 中国工程物理研究院应用电子学研究所 | Double-wavelength quick-switching Q-switched laser device |
| CN104201553A (en) * | 2014-09-22 | 2014-12-10 | 山东大学 | Dual-wavelength tunable solid laser and application thereof |
| WO2018035813A1 (en) * | 2016-08-25 | 2018-03-01 | 深圳大学 | Dual-frequency optical source |
| CN109378686A (en) * | 2018-09-29 | 2019-02-22 | 上海大学 | A kind of changeable multi-wavelength bidirectional tune Q rare-earth-doped fiber laser |
| CN109387496A (en) * | 2018-10-10 | 2019-02-26 | 深圳大学 | High-resolution micro imaging system |
| CN110752502A (en) * | 2019-05-09 | 2020-02-04 | 长春理工大学 | Single-longitudinal-mode and non-single-longitudinal-mode dual-wavelength laser alternate Q-switching output method and laser |
| CN110752503A (en) * | 2019-05-09 | 2020-02-04 | 长春理工大学 | Single longitudinal mode and non-single longitudinal mode double-pulse laser alternate Q-switching output method and laser |
| CN110932081A (en) * | 2019-05-09 | 2020-03-27 | 长春理工大学 | Electro-optically Q-switched dual-wavelength laser alternate coaxial output method and laser |
| CN110932074A (en) * | 2019-05-09 | 2020-03-27 | 长春理工大学 | Dual-wavelength laser cross frequency hopping and frequency modulation Q output laser and laser output method |
| CN110943366A (en) * | 2019-05-09 | 2020-03-31 | 长春理工大学 | Dual-wavelength alternating Q-switching output group pulse laser and laser output method |
| CN111029893A (en) * | 2019-05-09 | 2020-04-17 | 长春理工大学 | Dual-wavelength alternate Q-switching single longitudinal mode output group pulse laser and laser output method |
-
2003
- 2003-08-20 CN CN 03152818 patent/CN1227788C/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244356A (en) * | 2011-05-25 | 2011-11-16 | 中国工程物理研究院应用电子学研究所 | Double-wavelength quick-switching Q-switched laser device |
| CN102244356B (en) * | 2011-05-25 | 2013-02-13 | 中国工程物理研究院应用电子学研究所 | Double-wavelength quick-switching Q-switched laser device |
| CN104201553A (en) * | 2014-09-22 | 2014-12-10 | 山东大学 | Dual-wavelength tunable solid laser and application thereof |
| CN104201553B (en) * | 2014-09-22 | 2017-04-19 | 山东大学 | Dual-wavelength tunable solid laser and application thereof |
| WO2018035813A1 (en) * | 2016-08-25 | 2018-03-01 | 深圳大学 | Dual-frequency optical source |
| CN109378686A (en) * | 2018-09-29 | 2019-02-22 | 上海大学 | A kind of changeable multi-wavelength bidirectional tune Q rare-earth-doped fiber laser |
| CN109387496A (en) * | 2018-10-10 | 2019-02-26 | 深圳大学 | High-resolution micro imaging system |
| CN109387496B (en) * | 2018-10-10 | 2021-07-09 | 深圳大学 | High resolution microscopic imaging system |
| CN110752503A (en) * | 2019-05-09 | 2020-02-04 | 长春理工大学 | Single longitudinal mode and non-single longitudinal mode double-pulse laser alternate Q-switching output method and laser |
| CN110932081A (en) * | 2019-05-09 | 2020-03-27 | 长春理工大学 | Electro-optically Q-switched dual-wavelength laser alternate coaxial output method and laser |
| CN110932074A (en) * | 2019-05-09 | 2020-03-27 | 长春理工大学 | Dual-wavelength laser cross frequency hopping and frequency modulation Q output laser and laser output method |
| CN110943366A (en) * | 2019-05-09 | 2020-03-31 | 长春理工大学 | Dual-wavelength alternating Q-switching output group pulse laser and laser output method |
| CN111029893A (en) * | 2019-05-09 | 2020-04-17 | 长春理工大学 | Dual-wavelength alternate Q-switching single longitudinal mode output group pulse laser and laser output method |
| CN110752503B (en) * | 2019-05-09 | 2021-01-01 | 长春理工大学 | Single longitudinal mode and non-single longitudinal mode double-pulse laser alternate Q-switching output method and laser |
| CN110752502B (en) * | 2019-05-09 | 2021-01-01 | 长春理工大学 | Single-longitudinal-mode and non-single-longitudinal-mode dual-wavelength laser alternate Q-switching output method and laser |
| CN110932081B (en) * | 2019-05-09 | 2021-04-09 | 长春理工大学 | Electro-optically Q-switched dual-wavelength laser alternate coaxial output method and laser |
| CN110752502A (en) * | 2019-05-09 | 2020-02-04 | 长春理工大学 | Single-longitudinal-mode and non-single-longitudinal-mode dual-wavelength laser alternate Q-switching output method and laser |
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|---|---|
| CN1227788C (en) | 2005-11-16 |
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