Stability of LD end-pumped Z-cavity Nd∶GdVO4 laser
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摘要: 为了提升半导体激光二极管端面抽运Z型腔固体激光器的稳定性，以Nd∶GdVO4固体激光器为例，采用数值模拟的方法，在考虑晶体热透镜效应的情况下，研究了Z型谐振腔的臂长、镜片曲率半径等参数对高斯光束的影响，得到了晶体热透镜焦距随抽运光功率变化的关系曲线、谐振腔稳定性随热透镜焦距变化的关系曲线、以及高斯光束束腰半径随谐振腔分臂长和镜片曲率半径变化的关系曲线，并绘制了高斯光束的轮廓曲线。结果表明，适当选取Z型腔的分臂参数可在晶体主平面和后端镜处获得较小的束腰尺寸。本研究结果可对Z型固体激光器谐振腔的搭建提供理论参考及依据。Abstract: In order to improve the stability of laser diode(LD) end-pumped Z-cavity solid-state lasers, take Nd∶GdVO4 solid-state laser as an example. The influence of parameters like arm length and radius of curvature of the lens of the Z-shaped resonant cavity on the Gaussian beam was studied by numerical simulation, while considering the crystal thermal lensing effect. The relationship curves of the focal length of the crystal thermal lens with the variation of the pump power, the relationship curves of the stability of the resonant cavity with the variation of the focal length of the thermal lens, and the relationship curves of the Gaussian beam waist radius with the variation of the resonant cavity split arm length and the lens radius of curvature were obtained. The profile curves of the Gaussian beam were plotted. The results indicate that a suitable selection of the split-arm parameters of the Z-cavity can obtain a smaller beam waist size at the main plane of the crystal and the rear-end mirror, and the results of this study can provide a theoretical reference and basis for the construction of resonant cavities of Z-type solid-state lasers.
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Keywords:
- lasers /
- beam radius /
- numerical simulation /
- Z-cavity
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图 3 热透镜焦距与抽运光功率关系
Figure 3. Relationship between thermal lens focal length and pump power
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图 4 谐振腔稳定性参量随热透镜焦距的变化趋势
Figure 4. Stability parameter of the resonator changes with the focal length of the thermal lens
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图 6 臂长变化对谐振腔模半径的影响
Figure 6. Effect of the variation of the arm length on the cavity mode radius
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图 7 曲率半径R2变化对谐振腔模半径的影响
Figure 7. Effect of radius of curvature R2 on resonant cavity mode radius
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图 8 臂长L3变化对M1和M4处的光斑半径的影响
Figure 8. Effect of the variation of the arm length L3 on the beam radius at the M1 and M4
表 1 Nd∶GdVO4晶体特性参数
Table 1 Nd∶GdVO4 crystal characteristic parameters
absorption coefficient 7.4 mm thermal conductivity 11.7 W/(m·K) thermal-optical coefficient 4.7×10-6 K doping concentration 0.5% size of crystal 5 mm×5 mm×10 mm 
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[1] 浦双双, 任广胜, 吕冬, 等. 浅谈全固态激光器的研发与应用概况[J]. 数码世界, 2019, 170(12): 287. https://www.cnki.com.cn/Article/CJFDTOTAL-SJSM201912306.htm PU Sh Sh, REN G Sh, LÜ D, et al. An overview of the development and application of all-solid-state lasers[J]. Digital World, 2019, 170(12): 287. https://www.cnki.com.cn/Article/CJFDTOTAL-SJSM201912306.htm
[2] 方泽鹏. 高功率LD侧面泵浦全固态激光器研究[D]. 重庆: 重庆邮电大学, 2022: 5-12. FANG Z P. Research on high power LD side-pumped all-solid-state lasers[D]. Chongqing: Chongqing University of Posts and Telecommunications, 2022: 5-12(in Chinese).
[3] 李溶涛, 孟俊清, 陈晓, 等. VCSEL端面泵浦的全固体激光器[J]. 中国激光, 2022, 49(18): 1801002. https://www.cnki.com.cn/Article/CJFDTOTAL-JJZZ202218002.htm LI R T, MENG J Q, CHEN X, et al. VCSEL end-pumped all-solid-state laser[J]. Chinese Journal of Lasers, 2022, 49(18): 1801002(in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-JJZZ202218002.htm
[4] 钟凯, 张献中, 徐德刚, 等. 全固态双波长激光器研究进展(特邀)[J]. 光电技术应用, 2022, 37(4): 13-26. https://www.cnki.com.cn/Article/CJFDTOTAL-GDYG202204002.htm ZHONG K, ZHANG X Zh, XU D G, et al. Advances in all-solid-state dual-wavelength laser research (Invited)[J]. Photonics Applications, 2022, 37(4): 13-26(in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-GDYG202204002.htm
[5] HAN Zh Y, SUN D L, ZHANG H L, et al. 962 nm LD end-pumped Er∶YSGG cascade pulsed lasers at room temperature[J]. Infrared Physics and Technology, 2022, 127(23): 35-40.
[6] 陈星, 葛亚琼. Zr65Al7.5Ni10Cu17.5非晶合金激光熔凝的热效应模拟[J]. 激光技术, 2020, 44(2): 202-205. DOI: 10.7510/jgjs.issn.1001-3806.2020.02.011 CHEN X, GE Y Q. Simulation of thermal effects of laser melting of Zr65Al7.5Ni10Cu17.5 amorphous alloy[J]. Laser Technology, 2020, 44(2): 202-205(in Chinese). DOI: 10.7510/jgjs.issn.1001-3806.2020.02.011
[7] 李隆, 田丰, 赵致民, 等. LD端面泵浦折叠腔Nd∶YVO4/LBO激光器[J]. 光子学报, 2004, 33(4): 396-399. https://www.cnki.com.cn/Article/CJFDTOTAL-GZXB200404003.htm LI L, TIAN F, ZHAO Zh M, et al. LD end-pumped folded-cavity Nd∶YVO4/LBO laser[J]. Acta Photonica Sinica, 2004, 33(4): 396-399(in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-GZXB200404003.htm
[8] 秦琬, 杜晨林, 阮双琛, 等. 端面抽运四镜折叠腔Nd∶YVO4激光器的研究[J]. 光子学报, 2007, 36(5): 780-784. https://www.cnki.com.cn/Article/CJFDTOTAL-GZXB200705004.htm QIN W, DU Ch L, RUAN Sh Ch, et al. End-face pumping four-mi-rror folded-cavity Nd∶YVO4 laser[J]. Acta Photonica Sinica, 2007, 36(5): 780-784(in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-GZXB200705004.htm
[9] 侯军燕, 汪岳峰. LD双端端面抽运Nd∶YVO4折叠腔主振荡器的稳定性研究[J]. 红外, 2009, 30(1): 36-40. https://www.cnki.com.cn/Article/CJFDTOTAL-HWAI200901014.htm HOU J Y, WANG Y F. Stability study of LD double-ended end-surface pumped Nd∶YVO4 folded-cavity master oscillator[J]. Infrared, 2009, 30(1): 36-40(in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-HWAI200901014.htm
[10] 张强, 汪岳峰, 竹孝鹏, 等. LD双端泵浦U型腔Nd∶YVO4激光器稳定性研究[J]. 应用光学, 2010, 31(6): 1027-1031. https://www.cnki.com.cn/Article/CJFDTOTAL-YYGX201006034.htm ZHANG Q, WANG Y F, ZHU X P, et al. Stability study of LD double-end pumped U-cavity Nd∶YVO4 laser[J]. Journal of A-pplied Optics, 2010, 31(6): 1027-1031(in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-YYGX201006034.htm
[11] 王天明, 李斌成, 赵斌兴, 等. 高功率激光作用下光学元件非线性热效应研究[J]. 激光技术, 2022, 46(6): 729-735. DOI: 10.7510/jgjs.issn.1001-3806.2022.06.003 WANG T M, LI B Ch, ZHAO B X, et al. Study of nonlinear thermal effects of optical elements under high power laser action[J]. Laser Technology, 2022, 46(6): 729-735(in Chinese). DOI: 10.7510/jgjs.issn.1001-3806.2022.06.003
[12] 杨子鑫. 蓝光LD直接泵浦激光增益介质可见激光特性研究[D]. 济南: 齐鲁工业大学, 2022: 7-20. YANG Z X. Thermal stability analysis based on V-shaped resonant cavity[D]. Ji'nan: Qilu University of Technology, 2022: 7-20(in Chinese).
[13] 李萌萌, 杨飞, 赵上龙, 等. 复合Nd∶YAG晶体固体激光器热效应研究[J]. 激光与红外, 2020, 50(1): 42-48. https://www.cnki.com.cn/Article/CJFDTOTAL-JGHW202001009.htm LI M M, YANG F, ZHAO Sh L, et al. Thermal effect study of composite Nd∶YAG crystal solid-state lasers[J]. Laser & Infrared, 2020, 50(1): 42-48(in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-JGHW202001009.htm
[14] 金凤文. 100 kHz声光调Q Nd∶GdVO4激光器的研究[D]. 哈尔滨: 哈尔滨工业大学, 2007: 30-57. JIN F W. Study of 100 kHz acousto-optic modulated Q Nd∶GdVO4 laser[D]. Harbin: Harbin Institute of Technology, 2007: 30-57(in Chinese).
[15] INNOCENZI M E, YURA H T, FINCHER C L, et al. Thermal mo-deling of continuous-wave end-pump solid-state laser[J]. Applied Physics Letters, 1990, 56(19): 1831-1833.
[16] 秦琬, 杜晨林, 阮双琛, 等. 四镜折叠腔激光器腔内倍频束腰研究[J]. 深圳大学学报(理工版), 2007, 90(2): 154-158. https://www.cnki.com.cn/Article/CJFDTOTAL-SZDL200702013.htm QIN W, DU Ch L, RUAN Ch Sh, et al. Intracavity frequency doubling beam waist study of a four-mirror folding cavity laser[J]. Journal of Shenzhen University (Science and Technology Edition), 2007, 90(2): 154-158(in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-SZDL200702013.htm
[17] 吕百达. 激光光学[M]. 第3版. 北京. 高等教育出版社, 2003: 268-273. LÜ B D. Laser optics[M]. 3th ed. Beijing: Higher Education Press, 2003: 268-273(in Chinese).
[18] 朱思祁, 付乔克, 李安明, 等. LD泵浦Nd∶GdVO4蓝光激光器动态热稳定腔设计[J]. 光电工程, 2010, 37(11): 43-47. https://www.cnki.com.cn/Article/CJFDTOTAL-GDGC201011011.htm ZHU S Q, FU Q K, LI A M, et al. Dynamic thermal stabilization cavity design for LD-pumped Nd∶GdVO4 blue laser[J]. Photovoltaic Engineering, 2010, 37(11): 43-47(in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-GDGC201011011.htm
[19] 王瑞, 李港, 陈檬. 具有热透镜效应的LD端泵Z型腔的理论研究[J]. 激光与红外, 2001, 31(5): 306-308. https://www.cnki.com.cn/Article/CJFDTOTAL-JGHW200105015.htm WANG R, LI G, CHEN M. Theoretical study of Z-cavity of LD end pump with thermal lensing effect[J]. Laser and Infrared, 2001, 31(5): 306-308(in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-JGHW200105015.htm
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