[1]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,2007,24(2):154-158.
 QIN Wan,DU Chen-lin,RUAN Shuang-chen,et al.Research on beam waist for intracavity-frequency-doubling in four-mirror-folded cavity lasers[J].Journal of Shenzhen University Science and Engineering,2007,24(2):154-158.
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四镜折叠腔激光器腔内倍频束腰研究()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第24卷
期数:
2007年2期
页码:
154-158
栏目:
出版日期:
2007-04-30

文章信息/Info

Title:
Research on beam waist for intracavity-frequency-doubling in four-mirror-folded cavity lasers
文章编号:
1000-2618(2007)02-0154-05
作者:
秦琬12杜晨林1阮双琛1王云才2
1)深圳大学电子科学与技术学院,深圳 518060;
2)太原理工大学物理系,太原 030024
Author(s):
QIN Wan12DU Chen-linRUAN Shuang-chen1and WANG Yun-cai2
1) College of Electronic Science and Technology,Shenzhen University,Shenzhen 518060,P.R.China
2)Department of Physics,Taiyuan University of Technology,Taiyuan 030024,P.R.China
关键词:
固体激光器四镜折叠腔腔内倍频端面抽运束腰
Keywords:
solid-state laser four-mirror-folded cavity intracavity-frequency-doubling end-pumping beam waist
分类号:
TN 242;TN 248.1
文献标志码:
A
摘要:
基于传输矩阵理论,针对半导体激光端面抽运的四镜折叠腔腔内倍频固体激光器,数值分析了谐振腔中倍频分臂的束腰尺寸和位置与腔参量的关系.分析表明,选择较小曲率半径的后端镜以及适当缩短谐振腔倍频分臂的长度,均可以减小倍频分臂中激光的束腰半径,同时也会使束腰位置更靠近后端镜;其他分臂的长度变化对束腰尺寸影响不大,但可改变束腰的位置.较小的束腰半径有利于获得较高的二次谐波转换效率,但若束腰距离后端镜过近,在高功率运转情况下,容易损伤后端镜表面薄膜.
Abstract:
According to the transmission matrix theory,the resonator design of the end-pumped intracavity-frequency-doubling Nd∶YVO4 solid-state laser,which has a four-mirror-folded cavity,was numerically simulated.The relations between the size and location of the beam waist for frequency doubling and cavity parameters were analyzed.
  It is known that optical conversion efficiency of second harmonic generation is proportional to the power density of laser injected into the nonlinear crystal,which could be enhanced by reducing the size of beam.First of all,two figures showing the two stable regions of different kinds of resonators were drawn with measurements in experiments.Combining with the stable regions,groups of numerical calculation,for what the influence the two arms of cavity (L3 and L4), thermal focal length f and the radius of curvature of rear end mirror on the beam waist of frequency-doubling arm,were made by using Matlab software.By the analyses,four conclusions could be made as follow:first,as the pumping power increases,the thermal focal length decreases,the size of beam waist increases,meanwhile,the location of beam waist moves towards the rear-end mirror.Second,the smaller the radius of curvature of rear-end mirror is,the smaller the size of beam waist could be achieved,and the closer to the rear-end mirror the location of beam waist is.Third,within the stable region,when the length of L4 arm decreases to a certain degree,the size of beam waist become smaller,and its location is closer to rear-end mirror.Fourth,the size of beam waist is almost not influenced by the changes of length of L3 arm,however,when L3 arm is set at a proper length,the location of beam waist could move far away from the rear-end mirror.
  A smaller beam waist conduces to gain a higher optical conversion efficiency of second harmonic generation.But if the location of beam waist is too close to the rear-end mirror,under a high-pump power,it is possible to damage the surface of rear-end mirror.

参考文献/References:

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[2]Du C L,Ruan S C,Yu Y Q,等.6瓦二极管端面抽运Nd:GdVO4/LBO 准连续671 nm红光激光器[J].光学快报, 2005,13(6):2013-2018(英文版).
[3]Du C L,Ruan S C,Yu Y Q,等.利用BiB3O6晶体腔内倍频产生高功率1.34 μm的二次谐波[J].光学快报, 2005,13(21):8591-8595(英文版).
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[5]关俊,陈国夫,程光华,等.一种能补偿热效应的高功率端面泵浦Nd:YVO4激光谐振腔的设计[J].光子学报,2003,32(12):1418-1421.
[6]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.
[1]Smith R G.Theory of intracavity optical second-harmonic generation[J].IEEE J Quantum Electron,1970,6(4):215-223.
[2]Du C L,Ruan S C,Yu Y Q,et al.6 W diode-end-pumped Nd∶GdVO4/LBO quasi-continuous-wave red laser at 671 nm[J].Opt Express,2005,13(6):2013-2018.
[3]Du C L,Ruan S C,Yu Y Q,et al.High-power intracavity second-harmonic generation of 1.34 μm in BiB3O6 crystal[J] Opt Express,2005,13(21):8591-8595.
[4]Yao A Y,Hou W,Bi Y,et al.High-power cw 671 nm output by intracavity frequency doubling of a double-end-pumped Nd:YVO4 laser[J].Appl Opt 2005,44(30):7156-7160.
[5]GUAN Jun,CHEN Guo-fu,CHENG Guang-hua,et al.Design of thermal effect compensation resonator for a sort of high-power end-pumped Nd:YVO4 laser[J].Acta Photonica Sinica,2003,32(12):1418-1421(in Chinese).
[6]LI Long,TIAN Feng,ZHAO Zhi-min,et al.LD end-pumped folded cavity Nd:YVO4/ LBO laser[J].Acta Photonica Sinica,2004,33(4):396-399(in Chinese).

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备注/Memo

备注/Memo:
收稿日期:2007-01-01
基金项目:广东省科技计划资助项目(2004B16001210);广东省自然科学基金资助项目(04300858);广东省高等学校自然科学重点研究项目(05Z019);深圳市科技计划资助项目(200429)
作者简介:秦琬(1984-),男(汉族),河南省新乡市人,深圳大学与太原理工大学联合培养硕士研究生.E-mail:tylgqinwan@163.com
通讯作者:阮双琛(1963-),男(汉族),深圳大学教授、博士生导师.E-mail:scruan@szu.edu.cn
更新日期/Last Update: 2007-12-07