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低时间抖动的增益开关型被动调Q激光器

A Low Time Jittering Passive Q-switching Laser with Gain Switching

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摘要

被动调Q激光器的输出抖动一般较大,为了降低这一输出时间抖动,同时实现激光器的小型化,可以根据增益开关工作原理,利用电源控制抽运功率密度变化,实现被动调Q情况下的增益开关。根据这一原理研制了环形激光二极管(LD)抽运增益开关调Q激光器。这种新型被动调Q激光器的输出能量为30 mJ,输出脉冲宽度约16 ns。实验中将传统的两套抽运源减少为一套,通过控制电源波形直接形成抽运功率的增益台阶脉冲,减少了影响时间跳动的因素。多发次统计测量结果表明,激光脉冲与电源输出外触发信号的时间抖动小于1 μs。根据测量的抽运预脉冲功率稳定性和阶跃脉冲的瞬时抽运功率计算的输出抖动与实验结果基本相符。

Abstract

Generally, a passive Q-switching laser has a wider time jitter. In order to reduce the jitter time and the size of the laser, gain switching principle is researched. According to the principle, the pumping power density is controled by the power which generates a step current. A Q-switched laser pumped with a ring laser diodes according to gain switching principle is developed. A 30 mJ output energy and about 16ns pulse duration of this kind of passive Q-switching laser are obtained. There is only one set of pupming source to be used in the experiment. Gain step pulse is directly obtained by controling the waveform of current, and the factors which affect the laser pulse jitter are reduced by this way. Statistic reports of multi-measurement indicate that the laser pulse jittering time is less than 1 μs comparing with the trigger signal. According to the measured stability of pre-pumping and the transient power of the step pulse, the jitter time Δτd is calculated, which agrees well with the experimental result.

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中图分类号:TN 248.1

所属栏目:实验技术与元件

基金项目:中国工程物理研究院重点基金(2007A05001)资助项目。

收稿日期:2007-12-27

修改稿日期:2008-01-30

网络出版日期:0001-01-01

作者单位    点击查看

徐美健:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
蒋东镔:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
蒋新颖:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
段文涛:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
党钊:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
张雄军:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
於海武:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
隋展:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900

联系人作者:徐美健(flrc2003@163.com)

备注:徐美健(1979-),男,辽宁人,研究实习员,目前主要从事重复频率固体激光技术的研究。

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引用该论文

Xu Meijian,Jiang Dongbin,Jiang Xinying,Duan Wentao,Dang Zhao,Zhang Xiongjun,Yu Haiwu,Sui Zhan. A Low Time Jittering Passive Q-switching Laser with Gain Switching[J]. Chinese Journal of Lasers, 2008, 35(10): 1469-1472

徐美健,蒋东镔,蒋新颖,段文涛,党钊,张雄军,於海武,隋展. 低时间抖动的增益开关型被动调Q激光器[J]. 中国激光, 2008, 35(10): 1469-1472

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