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小时间抖动、高重复频率Nd∶YAG/Cr4+∶YAG被动调Q微型激光器

Passively Q-Switched Nd∶YAG/Cr4+∶YAG Microchip Laser with Low Time Jitter and High Repetition Rate

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摘要

报道了一种小时间抖动、高重复频率Nd∶YAG/Cr4+∶YAG被动调Q微型激光器。该激光器以808 nm单管激光二极管作为抽运源,基于切割方向为[001]的Cr4+∶YAG晶体在一定入射光功率密度下的极化取向特性,采用偏振抽运的方式,使抽运光偏振方向与晶轴方向平行,将Nd∶YAG晶体吸收后剩余的抽运光全部用于漂白Cr4+∶YAG晶体该晶轴方向的电偶极子。结果表明,采用偏振抽运的方式,通过优化切割方向为[001]的Cr4+∶YAG晶体取向,可以有效减小Nd∶YAG/Cr4+∶YAG被动调Q微型激光器输出脉冲时间抖动。

Abstract

A passively Q-switched Nd∶YAG/Cr4+∶YAG microchip laser with a low time jitter and a high repetition rate is reported, which uses a single-tube laser diode with a wavelength of 808 nm as the pumping source. Based on the polarization orientation characteristic of a Cr4+∶YAG crystal with a cutting direction of [001] at a certain incident beam power density, the polarized pumping method is chosen to make the polarization direction of the pumping light parallel to the crystallographic axis direction and all of the residual pumping light after absorption by the Nd∶YAG crystal is used for bleaching the electric dipoles along the crystallographic axis direction of the Cr4+∶YAG crystal. The results show that the output pulse time jitter of the Nd∶YAG/Cr4+∶YAG passively Q-switched microchip laser can be effectively reduced with the optimization of the orientation of the Cr4+:YAG crystal with a cutting direction of [001] when the polarized pumping method is adopted.

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中图分类号:TN248.1

DOI: 10.3788/aos201838.1014004

所属栏目:激光器与激光光学

基金项目:国家自然科学基金(61378023)、北京市自然科学基金(KZ201610005006,4174085)

收稿日期:2018-04-13

修改稿日期:2018-05-10

网络出版日期:2018-05-21

作者单位    点击查看

王煜:北京工业大学激光工程研究院, 北京100124
姜梦华:北京工业大学激光工程研究院, 北京100124
惠勇凌:北京工业大学激光工程研究院, 北京100124
雷訇:北京工业大学激光工程研究院, 北京100124
李强:北京工业大学激光工程研究院, 北京100124

联系人作者:李强(ncltlq@bjut.edu.cn); 王煜(wangyubgd@emails.bjut.edu.com);

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引用该论文

Wang Yu,Jiang Menghua,Hui Yongling,Lei Hong,Li Qiang. Passively Q-Switched Nd∶YAG/Cr4+∶YAG Microchip Laser with Low Time Jitter and High Repetition Rate[J]. Acta Optica Sinica, 2018, 38(10): 1014004

王煜,姜梦华,惠勇凌,雷訇,李强. 小时间抖动、高重复频率Nd∶YAG/Cr4+∶YAG被动调Q微型激光器[J]. 光学学报, 2018, 38(10): 1014004

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