高对比度紫外电光削波开关  

High contrast ratio ultraviolet electro-optical switch

作　　者：胡云[1] 赵学庆[1] 薛全喜[1] 华恒祺[1] 王大辉[1] 郑国鑫[1] 张永生[1] 朱永祥[1] 肖伟伟[1] 

机构地区：[1]西北核技术研究所激光与物质相互作用国家重点实验室,西安710024

出　　处：《强激光与粒子束》2013年第3期561-564,共4页High Power Laser and Particle Beams

基　　金：激光与物质相互作用国家重点实验室基金项目(SKLLIM1007)

摘　　要：采用电光开关产生短脉冲的技术,建立了一种抑制准分子激光放大链自发辐射放大(ASE)的方法,研制了高对比度紫外电光削波开关,并进行了原理性实验,将其应用于准分子单路主振荡功率放大系统第一级预放大器的ASE控制。实验中电光开关对比度达到了2000多,削波后的预放大器输出激光脉冲信号对比度提高至20 000多,有利于激光信号后续进一步高保真放大,为系统获得窄脉冲输出提供了技术支持。Using the technique of short pulse generation by electro-optical （E-O） switches, a method for amplified spontane- ous emission （ASE） suppression of the excimer laser＇s amplifier chain is established. An ultraviolet E-O switch with high con- trast ratio was produced, and its principle experiments were carried out. The switch was applied to ASE suppression of the first pre-amplifier in excimer single-channel master oscillator power-amplifier （MOPA） system. The experimental result shows that the contrast ratio of the EO switch is more than 2000, and the signal contrast ratio of output pulse of the pre-amplifier is promo- ted to over 20 000 after clipping. The result is beneficial to the following amplification of the laser pulse signal in the system, and provides a technical support for the system to obtain narrow-pulse signal output.

关 键 词：激光光学 电光开关 自发辐射 准分子激光 对比度 

分 类 号：TN248.2[电子电信—物理电子学]