高效率Nd:YVO<sub>4</sub>/LBO临界相位匹配脉冲绿光激光器

张学辉; 姜梦华; 刘斌; 惠勇凌; 雷訇; 李强

doi:doi:10.3788/hplpb20132511.2831

强激光与粒子束, 2013, 25 (11): 2831, 网络出版: 2013-11-14

高效率Nd:YVO₄/LBO临界相位匹配脉冲绿光激光器

High efficiency Nd:YVO₄/LBO critical phase matching green laser

论文大纲

张学辉 ^*姜梦华刘斌惠勇凌雷訇李强

作者单位

北京工业大学激光工程研究院，北京 100124

部分偏振光腔内倍频临界相位匹配高效率 partially polarized light Nd:YVO4/LBO Nd:YVO4/LBO intracavity frequency doubled critical phase matching high efficiency

摘要

报道了一种利用激光二极管(LD)端面泵浦Nd:YVO4晶体，声光调Q，LBO临界相位匹配腔内倍频的高效率、小体积、风冷绿光激光器。分析了不同偏振光泵浦的情况下，激光晶体对泵浦光的吸收特性。由分析得出，采用部分偏振光泵浦，可以提高激光晶体对泵浦光吸收均匀性，改善基波畸变，获得高转换效率激光输出。实验中，在泵浦光功率为33 W、声光调Q重复频率为20 kHz时，得到脉宽为23.96 ns、平均功率为15 W的1064 nm基频光输出。经倍频后，得到平均功率为11.2 W的绿光输出，倍频效率为74.6%，总体光-光转换效率为34%。在输出功率为10 W时，测得1 h内输出功率不稳定度为0.512 2%，水平方向和竖直方向的光束质量因子M2分别为1.2和1.1。

Abstract

A high efficiency, composite and air cooling LD end-pumped Nd:YVO4, acousto-optic(AO) Q-switched, and LBO(critical phase matching) intracavity doubled all-solid-state green laser is reported. By analyzing the absorption characteristics, with different polarized light pump, the uniformity of the crystal absorption could be significantly improved when the gain medium was pumped with partially polarized light. The fundamental wave distortion could be improved and the conversion efficiency could be enhanced. When the incident pump power was 33 W, the repetition rate of the AO-Q switch was 20 kHz, a 1064 nm fundamental frequency laser with an output power of 15 W and a pulse width of 23.96 ns was obtained. The output power of 532 nm green laser was 11.2 W. The optical to optical conversion efficiency from diode to green and from IR to green laser were about 34% and 74.6%. The output power instability was 0.512 2% at the output power of 10 W, the M2 beam quality factor was 1.2 in the horizontal direction and 1.1 in the vertical direction .

参考文献

[1] Blachman R, Bordui P F, Fejer M M. Laser-induced photochromic damage in potassium titanyl phosphate［J］. Appl Phys Lett, 1999, 64(27): 1318-1320.

[2] Feve J P, Boulanger B , Marnier G, et al. Repetition rate dependence of gray-tracking in KTiOPO4 during second-harmonic generation at 532 nm［J］. Appl Phys Lett, 1997, 70(3): 277-401.

[3] McDonagh L, Knappe R, Nebel A. Enhanced optical pumping of materials exhibiting polarization-dependent absorption. U. S, 200440258 117A1 ［P］. 2004-12-23.

[4] 王长青， Chow Y T，孟宪林，等. Nd:YVO4晶体的偏振激发荧光光谱及其LD泵浦激光特性［J］.中国激光， 1998, 25(12): 1129-1132.(Wang Changqing, Chow Y T, Meng Xianlin, et al. Fluorescence spectra and laser characteristics of Nd:YVO4 crystal excited by the polarized emission from a laser diode. Chinese Journal of Laser, 1998, 25(12): 1129-1132)

[5] 杨昆，张宁，李港，等.单管LD泵浦的高效紧凑连续绿光激光器［J］. 激光杂志， 2012, 33(2): 6-7.(Yang Kun, Zhang Ning, Li Gang, et al. Compact efficient diode-pumped continuous green laser. Laser Journal, 2012, 33(2): 6-7)

[6] 高艳霞，范滇元.用统计光学分析位相畸变光束的倍频变换［J］.强激光与粒子束， 2000, 12(6): 677-680.(Gao Yanxia, Fan Dianyuan. Statistical optics method applied to second harmonic generation of phase aberrated beam. High Power Laser and Particle Beams, 2000, 12(6): 677-680)

[7] Eimerl D. High average power harmonic generation［J］. IEEE Journal of Quantum Electronics, 1987, 23(5): 575-592.

[8] Cousins A K. Power conversion efficiency in second harmonic generation with nonuniform beams［J］. IEEE Journal of Quantum Electronics, 1993, 29(1): 217-226.

[9] 郭芳，樊仲维，张晶，等.全固态准连续TEM00模Nd:YVO4/LBO绿光激光器［J］.中国光学与应用光学, 2009, 2(4): 358-363.(Guo Fang, Fan Zhongwei, Zhang Jing, et al. All-solid-state quasi-CW Nd:YVO4/LBO green laser with TEM00 operation. Chinese Journal of Optics and Applied Optics, 2009,2(4): 358-363)

[10] 王军营，郑权，薛庆华，等.LD泵浦Nd:YVO4/临界相位匹配腔内倍频瓦级绿光激光器［J］.光子学报， 2003, 32(10): 1160-1162.(Wang Junying, Zheng Quan, Xue Qinghua, et al. Diode-pumped, Watt-level and all-solid-state Nd:YVO4/LBO green laser. Acta Photonica Sinica, 2003, 32(10): 1160-1162)

[11] McDonagh L, Wallenstein R. Low-noise 62 W CW intracavity doubled TEM00 Nd:YVO4 green laser pumped at 888 nm［J］. Opt Lett, 2007, 32(7): 802-804.

[12] Sharma S K, Mukhopadhyay P K, Singh A, et al. A simple, compact, and efficient diode-side-pumped linear intracavity frequency doubled Nd:YAG rod laser with 50 ns pulse width and 124 W green output power［J］. Rev Sci Instrum, 2010, 81: 073104.

[13] Bazyar H, Aghaie M, Daemi M H, et al. Compact 151 W green laser with U-type resonator for prostate surgery［J］.Optics and Laser Technology, 2013, 47: 37-241.

[14] 李健，何京良，侯伟，等.Nd3+掺杂浓度对大功率全固态Nd:YVO4激光器输出特性影响的研究［J］.中国激光， 2000, 27(4): 298-302.(Li Jian, He Jingliang, Hou Wei, et al. Influence of the Nd3+ doped concentration on the output performance of a high-power all-solid-state Nd:YVO4 laser. Chinese Journal of Laser, 2000, 27(4): 298-302)

[15] Innocenzi M E, Yura H T, Fincher C L, et al. Thermal modeling of continuous-wave end-pumped solid-state lasers［J］. Appl Phys Lett, 1990, 56(19): 1831-1833.

张学辉, 姜梦华, 刘斌, 惠勇凌, 雷訇, 李强. 高效率Nd:YVO₄/LBO临界相位匹配脉冲绿光激光器[J]. 强激光与粒子束, 2013, 25(11): 2831. Zhang Xuehui, Jiang Menghua, Liu Bin, Hui Yongling, Lei Hong, Li Qiang. High efficiency Nd:YVO₄/LBO critical phase matching green laser[J]. High Power Laser and Particle Beams, 2013, 25(11): 2831.

高效率Nd:YVO₄/LBO临界相位匹配脉冲绿光激光器

关于本站 Cookie 的使用提示

全站搜索

高效率Nd:YVO4/LBO临界相位匹配脉冲绿光激光器

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索

高效率Nd:YVO₄/LBO临界相位匹配脉冲绿光激光器