CN102610989A - Nanosecond laser with adjustable output transmittance - Google Patents
Nanosecond laser with adjustable output transmittance Download PDFInfo
- Publication number
- CN102610989A CN102610989A CN2011100211691A CN201110021169A CN102610989A CN 102610989 A CN102610989 A CN 102610989A CN 2011100211691 A CN2011100211691 A CN 2011100211691A CN 201110021169 A CN201110021169 A CN 201110021169A CN 102610989 A CN102610989 A CN 102610989A
- Authority
- CN
- China
- Prior art keywords
- laser
- crystal
- wave plate
- light path
- quarter wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a nanosecond laser with adjustable output transmittance. The technical scheme adopted by the invention is as follows: the nanosecond laser with adjustable output transmittance comprises high-pressure xenon lamps (4), totally-reflecting mirrors, 1/4 wave plates, a laser crystal (5) and a Q-switching crystal (9), wherein the totally-reflecting mirrors, the 1/4 wave plates, the laser crystal (5) and the Q-switching crystal (9) are arranged on a laser oscillation light path (6), especially, a first totally-reflecting mirror (1), a first 1/4 wave plate (3), the laser crystal (5), a Rayleigh prism (7), the Q-switching crystal (9) and a second totally-reflecting mirror (10) are sequentially arranged on the laser oscillation light path (6), and the first 1/4 wave plate (3) is connected with a rotator (2) and a rotating shaft of the rotator (2) is coaxial to the laser oscillation light path (6); and a second 1/4 wave plate (8) is arranged on the laser oscillation light path (6) between the Rayleigh prism (7) and the Q-switching crystal (9), the laser crystal (5) is a Ho,Cr,Tm:YAG crystal, and high-reflection films with the wavelength of 1,900-2,100 nm are coated on the reflecting surfaces of the first totally-reflecting mirror (1) and the second totally-reflecting mirror (10). The technical scheme can effectively adjust the output transmittance of the laser and can be widely applied to nanosecond lasers.
Description
Technical field
The present invention relates to a kind of nanosecond laser, the adjustable nanosecond laser of especially a kind of output transmitance.
Background technology
In the recent period, be that the laser of 2 μ m has human eye is not had the high-absorbility of injury, water and the characteristics of strong aerosol dispersion property based on output wavelength, caused the many concerns of People more and more.2 μ m laser are widely used in atmosphere environment supervision, remote sensing, range finding, wind-force monitoring and field of medical applications.In the practical application of laser, the transmitance of the pulse energy of its output can be adjusted artificially have very strong practical value.In order to reach this purpose, people are often on the basis of the loss of the gain of known endovenous laser crystal and each optical component, after estimating best output transmitance, by the half anti-chamber sheet end output of setting transmitance., the laser of this structure exists the shortcoming part: because of in the gain of laser crystal of infrared Q-switched laser low, cavity loss is big, it is serious that heat is moved back inclined to one side phenomenon, so be difficult to confirm its optimum transmission; When transmitance selects that laser can not vibrate when too high, to cross when low the output energy little, and feed back the excessive damage that very easily causes optical component in the laser cavity.
Summary of the invention
The technical problem that the present invention will solve provides a kind of rational in infrastructure for overcoming shortcoming part of the prior art, the practical adjustable nanosecond laser of output transmitance.
For solving technical problem of the present invention, the technical scheme that is adopted is: the adjustable nanosecond laser of output transmitance comprises total reflective mirror, quarter wave plate, laser crystal, adjusting Q crystal on high pressure xenon lamp and the laser generation light path, particularly,
Be equipped with first total reflective mirror, first quarter wave plate, laser crystal, Rayleigh prism, adjusting Q crystal and second total reflective mirror on the said laser generation light path successively;
Said first quarter wave plate is connected with circulator, and the rotating shaft of said circulator and laser generation light path are coaxial.
Further improvement as the adjustable nanosecond laser of output transmitance is equipped with second quarter wave plate on the laser generation light path between described Rayleigh prism and the adjusting Q crystal; Described first total reflective mirror is the Porro prism; Described laser crystal is Ho, Cr, Tm:YAG crystal; Described Ho, Cr, the both ends of the surface of Tm:YAG crystal are coated with the anti-reflection film to 1900～2100nm wavelength; The reflecting surface of described first total reflective mirror and second total reflective mirror is coated with the high-reflecting film to 1900～2100nm wavelength; The both ends of the surface of described first quarter wave plate and second quarter wave plate are coated with the anti-reflection film to 1900～2100nm wavelength.
Beneficial effect with respect to prior art is; Be used in and be equipped with first total reflective mirror, first quarter wave plate, laser crystal, Rayleigh prism, adjusting Q crystal and second total reflective mirror on the laser generation light path successively; And first technical scheme that is connected with the homoaxial circulator of laser generation light path of quarter wave plate and its rotating shaft; Through compound action to the adjusting of the first quarter wave plate optical axis corner and itself and Rayleigh prism; The output transmitance that had both realized laser is adjustable, has rational in infrastructure, practical again and regulates characteristics easily.Realize that the adjustable mechanism of output transmitance does; When the light on the laser generation light path passes through polarizer Rayleigh prism; Export from its side direction perpendicular to the light of paper the polarization direction, and the light that the polarization direction is parallel to paper then passes through first quarter wave plate at resonant cavity relaying persistent oscillation, regulates the corner of the first quarter wave plate optical axis; Promptly regulate comparing between the light that polarization direction in the vibration light path is parallel to paper perpendicular to the light and the polarization direction of paper, also just regulated the output transmitance of laser.After adopting the present technique scheme, the output transmitance that reaches the laser of the optical component composition supporting with it to use different laser crystal has been carried out a large amount of tests, and its result shows that the output transmitance that obtains is steady, suitable to be slided through regulating.The two group output transmission measurement data of table 1 for arbitrarily choosing, wherein, output 1 is respectively 200J and 160J with the pump energy of output 2, and the laser pulse width of output is 15ns.
| Angle | 78 degree | 81 |
84 degree | 87 degree | 90 degree | 93 |
96 degree | 99 degree |
| Output 1 (mj) | 232 | 270 | 325 | 316 | 246 | 195 | 192 | 195 |
| Output 2 (mj) | 83 | 168 | 186 | 188 | 134 | 109 | 96 | 95 |
| Angle | 102 degree | 105 |
108 degree | 111 degree | 114 degree | 117 degree | 120 degree | |
| Output 1 (mj) | 235 | 253 | 290 | 277 | 196 | 140 | 89 | |
| Output 2 (mj) | 139 | 180 | 190 | 176 | 152 | 122 | 78 |
Can find out that by table 1 along with the variation of angle between the polarization direction of polarised light in the optical axis of first quarter wave plate and the light path of vibrating, the energy of output pulse is also constantly changing.The angle that the output pulse energy polarised light that is parallel to paper in optical axis and the polarization direction of first quarter wave plate parallels reaches peak value when changeing 6 degree counterclockwise and commentaries on classics 18 is spent clockwise, and its corresponding output is respectively 325mJ and 290mJ.Symmetric deviations wherein is 6 degree; This is because laser crystal thermally induced birefringence when the high-energy pumping has produced fevering sodium effect; The polarised light rotation that the polarization angle one way has produced 3 degree during through crystal; After the symmetry correction, counterclockwise and dextrorotation gyration is 12 degree, and corresponding transmitance is 16.5%.Continue to increase angle, the polarised light that is parallel to the paper direction strengthens, and the output transmitance reduces, and the output energy reduces.
As the further embodiment of beneficial effect, the one, preferably be equipped with second quarter wave plate on the laser generation light path between Rayleigh prism and the adjusting Q crystal, be beneficial to the stable and enhancing of adjusting; Two is that first total reflective mirror is preferably the Porro prism, be convenient to its with first quarter wave plate between cooperate; The 3rd, laser crystal is preferably Ho, Cr, and the Tm:YAG crystal, not only cost performance is high, and versatility is also stronger; The 4th, Ho; Cr; The both ends of the surface of Tm:YAG crystal preferably are coated with the anti-reflection film to 1900～2100nm wavelength; The reflecting surface of first total reflective mirror and second total reflective mirror preferably is coated with the high-reflecting film to 1900～2100nm wavelength, and the both ends of the surface of first quarter wave plate and second quarter wave plate preferably are coated with the anti-reflection film to 1900～2100nm wavelength, all is beneficial to the overall efficiency that improves laser.
Description of drawings
Below in conjunction with accompanying drawing optimal way of the present invention is described in further detail.
Fig. 1 is a kind of basic structure sketch map of the present invention.
Fig. 2 is the oscillogram that the energy that the present invention after the test data patternization in the table 1 exports is changed with the first quarter wave plate optical axis corner.
Embodiment
Referring to Fig. 1, be equipped with first total reflective mirror 1, first quarter wave plate 3, laser crystal 5, Rayleigh prism 7, second quarter wave plate 8, adjusting Q crystal 9 and second total reflective mirror 10 on the laser generation light path 6 successively; Wherein, First total reflective mirror 1 is the Porro prism, and first quarter wave plate 3 is connected with laser generation light path 6 homoaxial circulators 2 with its rotating shaft, and the both sides of laser crystal 5 are equipped with high pressure xenon lamp 4; Laser crystal 5 is Ho; Cr, the Tm:YAG crystal, its both ends of the surface are coated with the anti-reflection film to 1900～2100nm wavelength; The reflecting surface of first total reflective mirror 1 and second total reflective mirror 10 is coated with the high-reflecting film to 1900～2100nm wavelength, and the both ends of the surface of first quarter wave plate 3 and second quarter wave plate 8 are coated with the anti-reflection film to 1900～2100nm wavelength.
During use; Only need to regulate the corner of circulator 2; The optical axis that makes coupled first quarter wave plate 3 that connects rotates with respect to the polarization direction of polarised light in the laser generation light path 6, just can on Rayleigh prism 7, obtain as or be similar to the laser beam 11 of output transmitance variation shown in Figure 2.
Obviously, those skilled in the art can carry out various changes and modification to the adjustable nanosecond laser of output transmitance of the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (7)
1. the adjustable nanosecond laser of output transmitance comprises total reflective mirror, quarter wave plate, laser crystal (5), adjusting Q crystal (9) on high pressure xenon lamp (4) and the laser generation light path (6), it is characterized in that:
Be equipped with first total reflective mirror (1), first quarter wave plate (3), laser crystal (5), Rayleigh prism (7), adjusting Q crystal (9) and second total reflective mirror (10) on the said laser generation light path (6) successively;
Said first quarter wave plate (3) is connected with circulator (2), and the rotating shaft of said circulator (2) and laser generation light path (6) are coaxial.
2. the adjustable nanosecond laser of output transmitance according to claim 1 is characterized in that being equipped with second quarter wave plate (8) on the laser generation light path (6) between Rayleigh prism (7) and the adjusting Q crystal (9).
3. the adjustable nanosecond laser of output transmitance according to claim 2 is characterized in that first total reflective mirror (1) is the Porro prism.
4. the adjustable nanosecond laser of output transmitance according to claim 3 is characterized in that laser crystal (5) is Ho, Cr, Tm:YAG crystal.
5. the adjustable nanosecond laser of output transmitance according to claim 4 is characterized in that Ho, Cr, and the both ends of the surface of Tm:YAG crystal are coated with the anti-reflection film to 1900～2100nm wavelength.
6. the adjustable nanosecond laser of output transmitance according to claim 4 is characterized in that the reflecting surface of first total reflective mirror (1) and second total reflective mirror (10) is coated with the high-reflecting film to 1900～2100nm wavelength.
7. the adjustable nanosecond laser of output transmitance according to claim 4 is characterized in that the both ends of the surface of first quarter wave plate (3) and second quarter wave plate (8) are coated with the anti-reflection film to 1900～2100nm wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100211691A CN102610989A (en) | 2011-01-19 | 2011-01-19 | Nanosecond laser with adjustable output transmittance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100211691A CN102610989A (en) | 2011-01-19 | 2011-01-19 | Nanosecond laser with adjustable output transmittance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102610989A true CN102610989A (en) | 2012-07-25 |
Family
ID=46528216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100211691A Pending CN102610989A (en) | 2011-01-19 | 2011-01-19 | Nanosecond laser with adjustable output transmittance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102610989A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037601A (en) * | 2014-06-13 | 2014-09-10 | 南京诺派激光技术有限公司 | Adjustable saturable absorbing device, production method of adjustable saturable absorbing device and application of adjustable saturable absorbing device in time domain output mode adjustable optical fiber pulse laser device |
| CN104028919A (en) * | 2013-03-06 | 2014-09-10 | 中国科学院理化技术研究所 | Welding system for on-line monitoring transmittance of laser crystal, and on-line monitoring method of welding system |
| CN107681422A (en) * | 2017-11-23 | 2018-02-09 | 沈阳理工大学 | A kind of adjustable Nd of pulsewidth nano-seconds:YAG solid state lasers |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02190814A (en) * | 1989-01-20 | 1990-07-26 | Ricoh Co Ltd | Laser output controller |
| JPH07235720A (en) * | 1994-02-22 | 1995-09-05 | Toshiba Corp | Laser oscillation apparatus |
| CN2781607Y (en) * | 2005-03-17 | 2006-05-17 | 中国人民解放军武汉军械士官学校光电技术研究所 | Unmodulation solid laser for electro-optical modulating |
-
2011
- 2011-01-19 CN CN2011100211691A patent/CN102610989A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02190814A (en) * | 1989-01-20 | 1990-07-26 | Ricoh Co Ltd | Laser output controller |
| JPH07235720A (en) * | 1994-02-22 | 1995-09-05 | Toshiba Corp | Laser oscillation apparatus |
| CN2781607Y (en) * | 2005-03-17 | 2006-05-17 | 中国人民解放军武汉军械士官学校光电技术研究所 | Unmodulation solid laser for electro-optical modulating |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104028919A (en) * | 2013-03-06 | 2014-09-10 | 中国科学院理化技术研究所 | Welding system for on-line monitoring transmittance of laser crystal, and on-line monitoring method of welding system |
| CN104037601A (en) * | 2014-06-13 | 2014-09-10 | 南京诺派激光技术有限公司 | Adjustable saturable absorbing device, production method of adjustable saturable absorbing device and application of adjustable saturable absorbing device in time domain output mode adjustable optical fiber pulse laser device |
| CN107681422A (en) * | 2017-11-23 | 2018-02-09 | 沈阳理工大学 | A kind of adjustable Nd of pulsewidth nano-seconds:YAG solid state lasers |
| CN107681422B (en) * | 2017-11-23 | 2024-02-06 | 沈阳理工大学 | Nd-YAG solid laser with adjustable pulse width in nanosecond range |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104104002B (en) | A kind of anti-disorder type solid state laser | |
| US20110170566A1 (en) | Mode-locked solid state lasers using diode laser excitation | |
| CN108923241B (en) | Passive Q-switched laser based on polarization synthesis laser gain | |
| CN105720469A (en) | Laser improving weak pump laser efficiency based on light polarization torsion | |
| CN104201553A (en) | Dual-wavelength tunable solid laser and application thereof | |
| CN102610989A (en) | Nanosecond laser with adjustable output transmittance | |
| Li et al. | A high-power, long-wavelength infrared ZnGeP 2 OPO pumped by a Q-switched Tm, Ho: GdVO 4 laser | |
| CN102244341A (en) | Device and method for improving linear polarization output power of neodymium:yttrium aluminum garnet (Nd:YAG) laser | |
| CN105811231A (en) | Volume Bragg grating high-energy pisosecond laser | |
| CN203645130U (en) | High-power glass-doped laser device | |
| CN208623094U (en) | It is a kind of to can be used for the multiple of ultraviolet laser and expand resonant cavity | |
| CN104218440A (en) | Internal frequency doubling ultraviolet laser of semiconductor side pump cavity | |
| CN102684056B (en) | Laser device capable of adjusting optimal transmittance | |
| Hardman et al. | High-power diode-bar-pumped intracavity-frequency-doubled Nd: YLF ring laser | |
| CN211981132U (en) | Electro-optical Q-switched cavity emptying laser | |
| Peng et al. | Doubly Q-switched Nd: YAG ceramic laser | |
| CN102263364B (en) | Transverse plane pump laser capable of high efficiently using pump light | |
| WO1999035722A1 (en) | Solid laser not requiring alignment | |
| CN103972786A (en) | Amplifier structure and laser device | |
| CN111478174A (en) | Electro-optical Q-switched cavity emptying laser | |
| CN109149351B (en) | Q-switched laser | |
| CN102157897A (en) | Pulse width-adjustable solid laser | |
| CN116191192A (en) | Laser with switchable Q-switching mode | |
| CN209805087U (en) | Double 45-degree refraction and reflection solid laser resonant cavity | |
| Wang et al. | RTP voltage-increased electro-optic Q-switched Ho: YAG laser with double anti-misalignment corner cubes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120725 |