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1.
Monitoring the optical field energies in an intracavity cascaded crystalline pulsed Raman laser enables us to probe the dynamics and optimise the performance of the laser, which produces up to 2.1 W average output power at 4 wavelengths between 532 and 636 nm selectable by simple angle tuning.  相似文献   

2.
Pask HM 《Optics letters》2005,30(18):2454-2456
Continuous-wave operation of a diode-pumped solid-state Raman laser at 1176 nm is reported. The intracavity Raman laser, based on a Nd:YAG laser crystal and a KGd(WO4)2 Raman crystal, reached threshold for 4 W of diode input power and gave up to 800 mW of output power at an overall conversion efficiency of 4%.  相似文献   

3.
We report a KGd(WO(4))(2) Raman laser pumped by a 532 nm laser that uses the intracavity nonlinear second harmonic and sum-frequency mixing of the Stokes and fundamental fields in beta-barium borate to generate selectable output among eight output wavelengths over the range 266-320 nm. Output pulse energies of up to 0.22 mJ at 10 Hz pulse repetition rate and average output powers up to 48 mW at 5 kHz were achieved.  相似文献   

4.
We demonstrate wavelength-selectable visible emissions from a miniature crystalline laser that combines the stimulated Raman scattering(SRS) effect in an Nd:YVO4 crystal with intracavity frequency mixing in an angle-tuned beta barium borate(BBO) crystal.The presented laser is operating on demand at any one of three wavelengths in the green-yellow spectral region.Up to 600,560,and 200 mW output powers at 559,532,and 588 nm,respectively,are obtained from the continuous wave(CW) laser having a 18 mm long resonator and a 3.8 W laser diode end pumping.The pump threshold for each visible wavelength is less than0.4 W.  相似文献   

5.
We reported an actively Q-switched, intracavity Nd3+:YVO4 self-Raman laser at 1176 nm with low threshold and high efficiency. From the extracavity frequency doubling by use of LBO nonlinear crystal, over 3.5 mW, 588 nm yellow laser is achieved. The maximum Raman laser output at is 182 mW with 1.8 W incident pump power. The threshold is only 370 mW at a pulse repetition frequency of 5 kHz. The optical conversion efficiency from incident to the Raman laser is 10%, and 1.9% from Raman laser to the yellow.  相似文献   

6.
LDA抽运Nd:YAG/KTP腔内和频589 nm连续波激光器   总被引:3,自引:3,他引:0  
吕彦飞  檀慧明  钱龙生 《光子学报》2005,34(9):1281-1284
报道了一种激光二极管阵列(LDA)抽运Nd:YAG双波长和频黄光激光器黄激光是由Nd:YAG晶体的1064 nm和1319 nm谱线腔内和频产生以KTP为和频晶体,采用Ⅱ类临界相位匹配,在12 W的808 nm抽运功率下,获得了最高功率为430 mW连续波基横模的589 nm黄激光输出,光光转换效率为3.6%,光束质量因子M2<1.2实验结果表明采用激光二极管阵列抽运Nd:YAG/KTP腔内和频技术是获得黄激光的高效方法,并可以应用到其它激光增益介质的两条谱线进行腔内和频,获得更多不同颜色的单谱线激光输出  相似文献   

7.
A gray-trace resistance KTP (GTR-KTP) second Stokes Raman laser intracavity driven by a diode-pumped acousto-optic Q-switched Nd:YVO4 laser was first demonstrated in this paper. With an incident pump power of 9.5 W, the intracavity GTR-KTP Raman laser, operating at the repetition rate of 20 kHz, produced the maximum average output power of 860 mW at 1129 nm. The minimum pulse width obtained in this GTR-KTP Raman laser was 10.8 ns. When the GTR-KTP was substituted with a common KTP, a lower average output power of 720 mW and longer pulse width of 15.9 ns were obtained in the common KTP Raman laser under the same pump condition and cavity setup as the GTR-KTP Raman laser. Experimental results indicated that the decreased absorption at the fundamental and Stokes wave in GTR-KTP was beneficial to improve the stimulated Raman scattering performance.  相似文献   

8.
Terahertz wave radiation has important applications in medical instrumentation, optical communication, and so on. In this paper, we demonstrate a dual-wavelength (659.6 nm/669.4 nm) light output of a compact intracavity frequency-doubling Nd:YAG laser. We achieve a maximum output power of 1.3 W at central wavelengths of 659.6 and 669.4 nm with linewidths of 57 and 74 pm, respectively. The power instability at the maximum output power is less than 1%, and the beam quality is 1.5. This dual-wavelength laser provides a potential source for generating a coherent terahertz wave radiation of 6.46 THz by the nonlinear optical difference frequency method.  相似文献   

9.
张蕴川  樊莉  魏晨飞  顾晓敏  任思贤 《物理学报》2018,67(2):24206-024206
采用波长锁定878.9 nm激光二极管共振抽运复合Nd:YV04激光晶体,改善热效应的同时提高抽运吸收率,分别以YVO_4和BaWO_4晶体作为拉曼介质,实验和理论研究了晶体性能、谐振腔结构和稳定性对内腔分体式连续波拉曼激光器性能的影响.结果表明:由于内腔分体式拉曼激光器腔长较长,谐振腔稳定性对激光器性能影响较大,选择高增益的拉曼晶体,不仅可获得高拉曼转换效率,还能一定程度上减轻热效应.而平凹腔结构中输出镜的曲率半径越小,拉曼晶体中基频光的功率密度越大,腔的动态稳定区越宽,获得的拉曼激光输出功率更高.最终以30 mm的BaWO_4晶体作为拉曼介质,在抽运功率25.1 W时,获得了3.02 W的连续拉曼激光输出,光-光转换效率达到12%.  相似文献   

10.
Yu H  Li Z  Lee AJ  Li J  Zhang H  Wang J  Pask HM  Piper JA  Jiang M 《Optics letters》2011,36(4):579-581
We demonstrate a cw, laser diode-pumped Nd:GdVO4/SrMoO4 crystalline Raman laser. First Stokes laser output at 1173.5?nm of 2.18?W was achieved with a diode-to-first Stokes efficiency of 8.7%. With intracavity frequency doubling in LiB3O5, 3.1?W of cw yellow emission at 586.8?nm was obtained with a 12.4% diode-to-yellow efficiency. The experimental results show that SrMoO4 is an excellent stimulated Raman scattering gain material for high-power cw near-IR Stokes and yellow lasers.  相似文献   

11.
Analytical equations for the power of second-harmonic stationary generation or sum frequency mixing in a Raman laser with an intracavity nonlinear medium are developed and analyzed as functions of pumping mode and other parameters of the laser system. Parameter relationships providing the maximum output power and conditions for suppression of both stimulated Raman scattering by sum frequency mixing and; consequently, of sum frequency mixing itself are found.  相似文献   

12.
Operation of Yb-doped fiber laser (YDFL) at short wavelengths (about 1030 nm) is known to be possible with relatively short active fibers. Frequency doubling of such a laser is studied. It is shown that, in contrast to conventional YDFLs, operating around 1080 nm, the short-wavelength YDFL does not exhibit significant spectral broadening induced by nonlinear effects. Thus, the generated spectrum remains narrower than the FBG reflection profile, which allows an almost twofold intracavity intensity enhancement. Consequently, the second harmonic generation in the KTP crystal placed inside the YDFL cavity appears more effective than the generation in the single-pass scheme by an order of magnitude. An output power of about 0.4 W at a wavelength of 515 nm is demonstrated.  相似文献   

13.
A dual-wavelength continuous-wave (CW) diode-pumped Nd:YAG laser that generates simultaneous laser action at the wavelengths 946 nm and 1319 nm is demonstrated. A total yellow-green output power of 2.33 W for the dual-wavelength was achieved at the incident pump power of 18.2 W. Furthermore, intracavity sum-frequency mixing at 946 and 1319 nm was then realized in a LBO crystal to reach the yellow-green range. We obtained a total CW output power of 340 mW at 551 nm.  相似文献   

14.
In this paper, a high-power continuous-wave deep blue laser at 447 nm with intracavity tripling was achieved. The deep blue laser at 447 nm is obtained by using a doubly cavity, and type-II critical phase matching KTP crystal for intracavity sum-frequency mixing. Through designing of the cavity, the optimum matching of modes and gains for the two wavelengths was obtained. With incident pump power of 30 W for the Nd:YVO4 crystal and 16 W for the other Nd:YVO4 crystal, the deep blue laser output of 3.5 W at 447 nm with TEM00 mode was obtained, the beam quality M2 value was equal to 1.8 in both horizontal and vertical directions at the maximum output power, and the power stability is better than 3% at the maximum output power during half an hour. The experimental results show that the intracavity sum-frequency mixing by doubly resonant is an effective method for high-power blue laser.  相似文献   

15.
A dual-wavelength continuous-wave (CW) diode-pumped Nd:LuVO4 laser that generates simultaneous laser action at the wavelengths 1066 and 1343 nm is demonstrated. A total dual-wavelength output power of 2.58 W was achieved at the incident pump power of 18.2 W. Furthermore, intracavity sum-frequency mixing at 1066 and 1343 nm was then realized in a LBO crystal to reach the yellow range. We obtained a total CW yellow output power of 830 mW at 594 nm.  相似文献   

16.
A dual-wavelength continuous-wave (CW) diode-pumped Nd:YVO4 laser that generates simultaneous laser action at the wavelengths 914 and 1342 nm is demonstrated. A total dual-wavelength output power of 1.79 W was achieved at the incident pump power of 18.2 W. Furthermore, intracavity sum-frequency mixing at 914 and 1342 nm was then realized in a LBO crystal to reach the yellow-green range. We obtained a total CW output power of 212 mW at 544 nm.  相似文献   

17.
Geng J  Wada S  Urata Y  Tashiro H 《Optics letters》1999,24(10):676-678
Widely tunable subnanosecond Ti:sapphire laser radiation pumped with a cw Q -switched laser-diode-pumped Nd:YAG laser has been demonstrated in a simple laser system with a configuration of variable cavity length. Laser wavelengths can be continuously tuned by adjustment of the rf of an intracavity acousto-optic tunable filter with a computer through the whole range of the laser gain. During tuning of the whole spectral range, there is no need to realign any optics in the laser, except for moving the mirror to track the change of the rf. The peak powers of the output pulses at a pump level of 300 mW are comparable with those of conventional tunable picosecond Ti:sapphire lasers at a cw pump level of almost 10 W.  相似文献   

18.
高稳定LD端面泵浦腔内倍频Nd∶YVO4/LBO连续红光激光器   总被引:2,自引:1,他引:2  
设计出一种能够较好地补偿激光晶体热效应的激光谐振腔,实现了高稳定LD单端泵浦LBO腔内倍频Nd∶YVO4连续红光激光器.当晶体吸收的泵浦功率为24.56 W时,671 nm激光功率达到1.203 W,光-光转换效率4.9%,激光模式为TEM00模.在输出功率为1.08 W时,激光器1 h功率不稳定度为0.52%.  相似文献   

19.
We report a stable high power and high beam quality diode-side-pumped cw green laser from intracavity frequency-doubled Nd: YAG laser with KTP. By using a L-shaped concave-convex resonator, designed with two Nd:YAG rods birefringence compensation, a large fundamental mode size in the laser crystal and a tight focus in the nonlinear crystal could be obtained simultaneously. The green laser delivers a maximum 532nm output power of 23.2 W. Under 532nm output power of 20.9 W, the beam quality factor is measured to be 4.1, and the fluctuation of the output power is less than 1.4% in an hour.  相似文献   

20.
高稳定LD泵浦腔内倍频Nd∶YVO4/KTP连续绿光激光器   总被引:1,自引:0,他引:1  
设计出一种能够较好地补偿激光晶体热效应的激光谐振腔,实现了高稳定LD单端泵浦KTP腔内倍频Nd∶YVO4连续绿光激光器.当晶体吸收的泵浦功率为24.56 W时,532 nm激光功率达到5.3 W,光-光转换效率达到21.6%,激光模式为TEM00模.在输出功率5W左右时,激光器1 h功率不稳定度优于0.6%  相似文献   

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