具有两个瑞利长度三镜折叠腔的设计

发布时间：2018-01-26 06:50

本文关键词： 激光光学谐振腔等相位面瑞利长度　出处：《激光技术》2017年01期 　论文类型：期刊论文

【摘要】：为了提高倍频效率、分析倍频晶体内束腰位置对倍频效率的影响,根据基模高斯光束传输特性,结合稳定三镜折叠腔中端镜处等相位面曲率半径与腔镜曲率半径相等这一特点,在激光光束传输的合适位置上,放入与等相位面曲率半径相同的腔镜,构成倍频晶体内具有两个瑞利长度的三镜折叠腔,提高了倍频效率。对比了相同端镜构成的具有一个瑞利长度和两个瑞利长度谐振腔,相对于分臂长度变化的稳区范围。结果表明,使用5W光纤耦合880nm激光二极管,端面抽运3mm×3mm×5mm的Nd∶YVO4,采用10mm×2.1mm×0.5mm的PPMg OLN为倍频晶体,使用具有两个瑞利长度的谐振腔比具有一个瑞利长度的谐振腔,整体提高倍频效率约18%,两种腔型的光束质量相同,倍频光与基频光偏振方向一致,输出稳定的低噪声绿光,验证了谐振腔设计的有效性。该研究对腔内倍频效率的提高是有帮助的。
[Abstract]:In order to improve the efficiency of frequency doubling, the influence of the position of beam waist in frequency doubling crystal on the efficiency of frequency doubling is analyzed, according to the beam propagation characteristics of fundamental mode Gao Si. Combined with the characteristic that the radius of curvature at the end mirror is equal to the radius of curvature of the mirror in the stable three-mirror folded cavity, a mirror with the same radius of curvature of the equal phase plane is placed at the appropriate position of the laser beam propagation. Three mirror folded resonators with two Rayleigh lengths in the octave crystal are constructed to improve the efficiency of frequency doubling. The resonant resonators with one Rayleigh length and two Rayleigh length resonators with the same endoscope are compared. The results show that the end pumped 3mm 脳 3mm 脳 5mm Nd:YVO4 with 5W fiber coupled 880nm laser diode. The PPMg OLN with 10 mm 脳 2.1 mm 脳 0.5 mm is used as the frequency doubling crystal, and the resonator with two Rayleigh lengths is used as the resonator with one Rayleigh length. The overall frequency doubling efficiency is improved by about 18. The beam quality of the two types of cavity is the same. The frequency doubling light is consistent with the polarization direction of the fundamental frequency light and the stable low noise green light is output. The effectiveness of the cavity design is verified, and the study is helpful to improve the efficiency of intracavity frequency doubling.
【作者单位】：北京理工大学珠海学院信息学院电子工程系;
【基金】：广东省高等学校优秀青年教师培养计划资助项目(YQ2013208) 广东省高等学校优秀青年创新人才培养计划育苗工程(自然科学)资助项目(2013LYM_0101) 北京理工大学珠海学院科研发展基金资助项目(2013JS02)
【分类号】：TN24
【正文快照】： 引言绿光激光在激光显示、非线性光学、海洋探测、全息、医疗、可调谐激光器抽运等方面有着重要的应用。目前对于连续绿光激光产生的方案主要有激光二极管直接产生绿光[1]、固体或光纤激光器腔外单程通过周期极化晶体倍频产生绿光[1-2]、外腔谐振产生绿光[3]、激光二极管抽运

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