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基于增益光栅的注入锁定单频自调Q激光器

Injection Locked Single Frequency Self-Q-Switched Lasers Based on Gain Gratings

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摘要

空间光束在增益介质中相互干涉,产生空间烧孔现象,形成增益光栅。通过四波混频作用形成的增益光栅具有自适应性、自调Q性和空间滤波能力,能够得到全息的共轭输出。但其都起始于腔内的自发辐射,自发辐射容易受到抽运的影响,而且带宽很宽,导致输出的频率会有一定的波动。实验可知,在基于增益光栅的自启动单频调Q激光器中,采用外部注入单频窄线宽的种子源引导形成增益光栅,可获得锁定在种子光频谱范围内的稳定的单频调Q脉冲输出。对比实验发现,在相同的观察时间内,注入种子源输出的频谱稳定程度远高于自启动输出的频谱稳定程度。这一现象也证明了通过外部种子注入形成光栅,利用增益光栅的自适应性能够得到稳频输出。

Abstract

The interference of space beam in gain medium generates space burning hole phenomenon, and forms the gain grating. The gain grating formed by the four-wave mixing function has adaptive, self-tuning Q and spatial filtering capability, and can obtain holographic conjugate output. But all of them start from the spontaneous emission in the cavity. Spontaneous emission is easily influenced by the pump, and its bandwidth is wide, which will cause a certain fluctuation in the output frequency. In this paper, a single-frequency Q-switched pulse output locked in the seed spectrum range is obtained by an external single-frequency narrow linewidth source injection in a self-starting single-frequency laser based on a gain grating. Comparative experiment shows that in the same observation time, the spectral stability of the injected output is much higher than the self-starting output. This phenomenon also proves that the steady frequency output can be obtained by the adaptability of the gain grating formed by external seed injection.

Newport宣传-MKS新实验室计划
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中图分类号:TN248.1

DOI:10.3788/aos201838.0914002

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:2018-03-08

修改稿日期:2018-04-13

网络出版日期:2018-04-23

作者单位    点击查看

许云鹏:北京工业大学激光工程研究院,北京 100124
吴婷:北京工业大学激光工程研究院,北京 100124
李之通: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); 许云鹏(xyp15510331803@163.com);

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引用该论文

Xu Yunpeng,Wu Ting,Li Zhitong,Jiang Menghua,Hui Yongling,Lei Hong,Li Qiang. Injection Locked Single Frequency Self-Q-Switched Lasers Based on Gain Gratings[J]. Acta Optica Sinica, 2018, 38(9): 0914002

许云鹏,吴婷,李之通,姜梦华,惠勇凌,雷訇,李强. 基于增益光栅的注入锁定单频自调Q激光器[J]. 光学学报, 2018, 38(9): 0914002

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