中国激光, 2007, 34 (12): 1643, 网络出版: 2007-12-15   

低阈值宽调谐的内腔调Q Nd∶YVO4/PPLN光学参量产生

Low-Threshold Widely-Tunable Intracavity Q-Switched Nd∶YVO4/PPLN Optical Parametric Generator
作者单位
1 天津大学精密仪器与光电子工程学院激光与光电子研究所, 天津 300072
2 教育部光电信息技术科学重点实验室, 天津 300072
摘要
将多周期极化铌酸锂(PPLN)晶体置于激光二极管(LD)端面抽运的声光调Q Nd∶YVO4激光器谐振腔内,实现了准相位匹配内腔光学参量直接产生(QPM-IOPG)。PPLN晶体长20 mm,利用外加电场极化法制作,极化沿晶体的z向进行。设定声光Q开关重复频率为19 kHz,通过温度调谐和周期调谐,获得了信号光在1384~1541 nm范围内的连续输出,脉冲宽度约为80 ns。在PPLN晶体温度为140 ℃,极化周期为29 μm时,内腔光参量产生的阈值仅为0.93 W,在3 W激光二极管抽运功率下,获得了140 mW的信号光输出;在极化周期为26.5 μm时,内腔光参量产生的阈值增大到1.36 W,在3 W激光二极管抽运功率下,获得了105 mW的信号光输出。分析了不同极化周期下阈值和转换效率存在差异的原因,对内腔光学参量产生的阈值进行了理论分析和计算。
Abstract
A quasi-phase-matched intracavity optical parametric generator (QPM-IOPG) is demonstrated based on multi-grating periodically poled lithium niobate (PPLN) internal to an acousto-optically Q-switched Nd∶YVO4 laser. The PPLN crystal is 20 mm long and periodically poled along the z-axis by using external electric poling technique. While the Q-switch repetition rate is set at 19 kHz, the signal wavelength can be continuously tuned from 1384 nm to 1541 nm by combining temperature tuning and grating tuning. The measured signal pulse width is approximately 80 ns. While the PPLN crystal temperature is 140 ℃, the QPM-IOPG threshold is just 0.93 W with the 29 μm grating period and 3 W of laser diode (LD) pump power produces 140 mW signal output. With the 26.5 μm grating period, the QPM-IOPG threshold is increased to 1.36 W and at an incident LD pump of 3 W, 105 mW signal is obtained. The reason of the different thresholds and conversion efficiencies for various grating periods is analyzed and the theoretical calculation of the QPM-IOPG threshold is also presented.

纪峰, 姚建铨, 张百钢, 张铁犁, 赵璞, 王鹏. 低阈值宽调谐的内腔调Q Nd∶YVO4/PPLN光学参量产生[J]. 中国激光, 2007, 34(12): 1643. 纪峰, 姚建铨, 张百钢, 张铁犁, 赵璞, 王鹏. Low-Threshold Widely-Tunable Intracavity Q-Switched Nd∶YVO4/PPLN Optical Parametric Generator[J]. Chinese Journal of Lasers, 2007, 34(12): 1643.

本文已被 4 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!