采用Cr4+:YAG饱和吸收体的电光调Q二极管泵浦YVO4/Nd:YVO4激光器中的脉冲压缩

Pulse compression in an electro-optic Q-switched diode-pumped YVO4/Nd:YVO4 laser with a Cr4+:YAG saturable absorber.

作者信息

Li Tao, Zhao Shengzhi, Zhuo Zhuang, Yang Kejian, Li Guiqiu, Li Dechun

机构信息

School of Information Science and Engineering, Shandong University, Jinan, Shandong 250100, China.

出版信息

Appl Opt. 2009 Apr 20;48(12):2243-8. doi: 10.1364/ao.48.002243.

DOI:10.1364/ao.48.002243

PMID:19381173

Abstract

A diode end-pumped doubly Q-switched YVO4/Nd:YVO4 laser has been realized for the first time to our knowledge by using both an electro-optic (EO) modulator and a Cr4):YAG saturable absorber. A 3.8 ns pulse width is generated by this laser under a pump power of 15 W at 2 kHz, which is obviously compressed in comparison with that of 8.8 ns from a single actively EO Q-switched laser. Under the same conditions, peak power values of 174.7 and 93 kW are also obtained. A coupled equation is given to theoretically analyze the experimental data. The experimental and theoretical results show that the doubly Q-switched laser has the advantages of a shorter pulse width and higher pulse peak power in contrast with a singly Q-switched laser.

摘要

据我们所知，首次通过使用电光（EO）调制器和Cr4+:YAG可饱和吸收体实现了二极管端面泵浦双调Q YVO4/Nd:YVO4激光器。该激光器在15W泵浦功率、2kHz重复频率下产生了3.8ns的脉冲宽度，与单主动电光调Q激光器的8.8ns脉冲宽度相比明显压缩。在相同条件下，还获得了174.7kW和93kW的峰值功率值。给出了耦合方程对实验数据进行理论分析。实验和理论结果表明，与单调Q激光器相比，双调Q激光器具有脉冲宽度更短、脉冲峰值功率更高的优点。