共查询到20条相似文献,搜索用时 0 毫秒
1.
H. Xu X. Zhang Q. Wang C. Wang W. Wang L. Li Z. Liu Z. Cong X. Chen S. Fan H. Zhang X. Tao 《Applied physics. B, Lasers and optics》2012,107(2):343-348
A diode-pumped passively Q-switched Nd:YAG/SrWO4 intracavity Raman laser is presented. As high as 1.78?W average power is obtained at an incident pump power of 14.9?W with a pulse repetition frequency of 21.2?kHz. The highest pulse energy is 88.1???J obtained at a pump power of 13.7?W. The obtained pulse energy and average power are much higher than those of the previously reported diode-pumped passively Q-switched intracavity Raman lasers. 相似文献
2.
Yanmin Duan Fugui Yang Haiyong Zhu Zhaojie Zhu Chenghui Huang Zhenyu You Yong Wei Ge Zhang Chaoyang Tu 《Optics Communications》2010,283(24):5135-5138
An LD end-pumped Nd:YAG/SrWO4 continuous-wave 560 nm laser is presented based on intracavity sum-frequency mixing of the fundamental and first-Strokes light. The maximum output power of 330 mW at 559.6 nm was obtained for the diode pump power of 13.7 W and the conversion efficiency was about 2.5%. The intense blue emission was also observed in the SrWO4 crystal when the Raman laser was operating above threshold. This blue emission is centered at 473 nm, which also happened to YVO4. 相似文献
3.
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
4.
Niloy Dutta 《Optical and Quantum Electronics》1979,11(1):1-9
The quantum mechanical Langevin equations of a cavity where laser action takes place both by ordinary population inversion and stimulated Raman scattering is discussed for both single mode and multimode oscillation of the pump and Raman laser. Expressions for amplitude correlation and linewidth due to phase diffusion are obtained both for homogeneous and inhomogeneous broadening. 相似文献
5.
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
6.
Sub-nanosecond microchip laser with intracavity Raman conversion 总被引:3,自引:0,他引:3
A.A. Demidovich P.A. Apanasevich L.E. Batay A.S. Grabtchikov A.N. Kuzmin V.A. Lisinetskii V.A. Orlovich O.V. Kuzmin V.L. Hait W. Kiefer M.B. Danailov 《Applied physics. B, Lasers and optics》2003,76(5):509-514
Efficient sub-nanosecond pulse operation of microchip lasers with intracavity Raman conversion and pulse compression is presented
for the first time. The microchip lasers were composed of Nd:LSB or Nd:YAG laser crystals, Cr4+:YAG saturable absorber, and Ba(NO3)2 Raman medium. The pulse duration obtained at the Stokes wavelength (1196 nm) was as short as 118 ps. Optical conversion efficiency
of laser-diode pump power to the Stokes power of 8% was reached. Pulse energy and peak power of Stokes emission were 1.2 μJ
and 5.4 kW, correspondingly. Numerical calculations are in good agreement with obtained experimental results.
Received: 20 December 2002 / Revised version: 6 March 2003 / Published online: 5 May 2003
RID="*"
ID="*"Corresponding author. Fax: +1-716/645-6945, E-mail: ankuzmin@acsu.buffalo.edu
RID="**"
ID="**"Present address: University at Buffalo, SUNY, The Institute for Lasers, Photonics, and Biophotonics, 458 NSC, Buffalo,
NY 14 260-3000, USA 相似文献
7.
Stimulated Raman scattering (SRS) of picosecond pulses is investigated in a new crystal SrWO4. The second harmonic generation of a mode-locked Nd:YAG laser system is used as the pump source. In an external singlepass configuration, the SRS thresholds for the first to the fourth Stokes lines are measured. For the first Stokes line, the steady-state gain coefficient of the SrWO4 crystal is calculated to be 15.96cm//GW. In our experiment, as many as five Stokes lines (559.23 nm, 589.61 nm, 623.49 nm, 661.50 nm, 704.44 nm) and three anti-Stokes lines (506.97nm, 484.34 nm, 463.65nm) are observed, and the total conversion efficiency is as high as 62%. 相似文献
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9.
Multimode pumped continuous-wave solid-state Raman laser 总被引:6,自引:0,他引:6
Grabtchikov AS Lisinetskii VA Orlovich VA Schmitt M Maksimenka R Kiefer W 《Optics letters》2004,29(21):2524-2526
We demonstrate the continuous-wave operation of a solid-state Raman laser containing a barium nitrate crystal as the Raman medium. The Raman laser, which has a singly resonant cavity, is pumped by multimode radiation. The Raman oscillation threshold is reached at approximately 2 W of pump power. As much as 500 kW/cm2 of Stokes power density at 60-kW/cm2 pump power density is obtained in the cavity. 相似文献
10.
Hongwei Chu Jia Zhao Yufei Li Shengzhi Zhao Kejian Yang Dechun Li Guiqiu Li Tao Li Wenchao Qiao 《Applied physics. B, Lasers and optics》2014,117(3):869-873
By using a doubly passively Q-switched Nd:Gd3Ga5O12(Nd:GGG) laser with Cr4+:YAG and GaAs as saturable absorbers as pump laser, simultaneous intracavity optical parametric oscillation and stimulated Raman scattering based on a single X-cut KTiOPO4 (KTP) crystal have been realized. Under an incident diode pump power of 10.5 W, the output powers at the signal wave near 1,569 nm and the first Stokes emission near 1,094 nm were 218 and 72 mW, corresponding to the optical-to-optical conversion efficiencies of 2.08 and 0.69 %, respectively. The measured shortest pulse duration at the signal wave near 1,569 nm was 580 ps, generating a pulse peak power of 43.7 kW, while the minimum pulse duration at the first Stokes emission near 1,094 nm was 1.61 ns. By adjusting the tilt angle of the KTP crystal, up to the third Stokes scattering was also obtained. 相似文献
11.
We describe a double beam intracavity dye laser spectrometer which is capable of a direct quantitative measurement of the absorbance of weak absorbers. The instrument is sensitive to broad band absorptions. The spectrometer can be modeled to allow a prediction of its sensitivity. Experimentally, the spectrometer reported here is about as sensitive as earlier flash lamp pumped intracavity spectrometers. 相似文献
12.
研究了外腔式SrWO4拉曼激光器在ns脉冲抽运下的输出特性。利用主动调Q的Nd∶YAG激光器产生的脉冲宽度为11.7 ns,输出能量为80 mJ的激光作为抽运源,拉曼激光谐振腔采用平平腔,实验采用4片对一阶斯托克斯脉冲和二阶斯托克斯脉冲不同反射率的输出耦合镜,测量了输出能量与抽运能量的关系,计算了转换效率与抽运能量的关系。当输出耦合镜对一阶斯托克斯脉冲的反射率为39.9%时,实验得到一阶斯托克斯脉冲的最大能量和转换效率分别为23.9 mJ和36.2%,当输出耦合镜对一阶斯托克斯脉冲和二阶斯托克斯脉冲的反射率分别为80.5%和12.4%时,得到二阶斯托克斯脉冲的最大输出能量和转换效率分别为16.4 mJ和25.4%,典型的一阶斯托克斯脉冲和二阶斯托克斯脉冲的脉冲宽度分别为6.1 ns和5.8 ns。 相似文献
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14.
We report a continuous-wave (CW) green laser emission by sum-frequency mixing in Nd:GdVO4 and Nd:YLF crystals. Using type-I critical phase-matching (CPM) LBO crystal, a green laser at 538 nm is obtained by 912 and
1313 nm intracavity sum-frequency mixing. The maximum output power of 185 mW is obtained when an incident pump laser of 18.2
W is used. At the output power level of 185 mW, the output stability is better than 3.3%. 相似文献
15.
Barium tungstate (BaWO4) is employed to achieve efficient stimulated Raman scattering conversion in a compact diode-pumped actively Q-switched Nd:YAG laser. With an incident pump power of 9.2 W, 1.56 W of 1181 nm first-Stokes average output power was generated at a pulse repetition rate of 20 kHz, corresponding to an optical-to-optical conversion efficiency of 16.9%. 相似文献
16.
We report a compact Ho:YAG laser that is intracavity pumped by a diode-pumped Tm:YLF laser. Both lasers exhibit pulse mode behavior. Operating both crystals at room temperature (25 degrees C), we obtained 1.6 W of average output at 2.09 microm from the Ho:YAG laser for 15.4 W of diode power incident upon the Tm:YLF rod and a slope efficiency of 21%. 相似文献
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19.
We present for the first time a Nd:YAG laser emitting at 1064 nm intracavity pumped by a 946 nm diode-pumped Nd:YAG laser.
A 885 nm laser diode is used to pump the first Nd:YAG crystal emitting at 946 nm, and the second Nd:YAG laser emitting at
1064 nm intracavity pumped at 946 nm. We achieved an output power of 7.97 W at 1064 nm for an absorbed pump power at 946 nm
of 9.55 W, corresponding to an optical efficiency of 83.4%. The beam quality M2 quality factor is about 1.1 at the maximum output power. 相似文献
20.
Highly efficient cascaded P-doped Raman fiber laser pumped by Nd:YVO4 solid-state laser 总被引:1,自引:0,他引:1
A highly efficient cascaded P-doped Raman fiber laser (RFL) pumped by a 1064-nm continuous wave (CW) Nd:YVO4 solid-state laser is reported. 1.15-W CW output power at 1484 nm is obtained while the input pump power is 4 W, corresponding to the power conversion efficiency of 28.8%. The threshold pump power for the second-order Stokes radiation is 1.13 W. The slope efficiency is as high as 42.6%. The experimental results are in good agreement with theoretical ones. Furthermore, the power instability of the P-doped RFL at 1484 nm in an hour is observed to be less than 5%. 相似文献