掺钕钇铝石榴石泵浦的周期性极化铌酸锂光学参量发生器，由532纳米泵浦的光学参量发生器的窄带输出作为种子源。

Nd:YAG-pumped periodically poled LiNbO3 optical parametric generator seeded with the narrowband output of a 532-nm pumped optical parametric generator.

作者信息

Haidar Sajjad, Usami Takeshi, Ito Hiromasa

机构信息

Research Institute of Electrical Communication, Tohoku University, Sendai, Japan.

出版信息

Appl Opt. 2002 Sep 20;41(27):5656-9. doi: 10.1364/ao.41.005656.

DOI:10.1364/ao.41.005656

PMID:12269565

Abstract

We present a simple scheme to generate a continuously tunable pulsed narrow-bandwidth infrared wave. An Nd:YAG-pumped periodically poled lithium niobate optical parametric generator (OPG) is seeded with the output of another OPG pumped by the second harmonic (0.532 microm) of the Nd:YAG laser. A tunable idler wave from the 0.532-microm pumped OPG, operated away from the degenerate point, provides a narrow linewidth seed source for the 1.064-microm pumped broadband OPG. Seeding forces the second OPG to operate in a narrowband operation comparable with that of the seed source. Linewidth of the YAG-pumped OPG is 5-25 nm, in the tuning range of 1.61-1.83 microm (signal), narrowed to 1.48-1.05 nm. Methods of further reduction of linewidth also have been discussed.

摘要

我们提出了一种简单的方案来产生连续可调谐的脉冲窄带宽红外波。一个由Nd:YAG泵浦的周期性极化铌酸锂光学参量发生器（OPG），其种子源是由Nd:YAG激光的二次谐波（0.532微米）泵浦的另一个OPG的输出。一个来自0.532微米泵浦OPG的可调谐闲频波，在远离简并点的情况下工作，为1.064微米泵浦的宽带OPG提供了一个窄线宽种子源。种子注入迫使第二个OPG在与种子源相当的窄带模式下工作。YAG泵浦OPG的线宽在1.61 - 1.83微米（信号）的调谐范围内为5 - 25纳米，缩小到1.48 - 1.05纳米。还讨论了进一步减小线宽的方法。