Suppression of ASE from excimer laser using cascaded UV electro-optical switch

HU Yun; ZHAO Xue-qing; XUE Quan-xi; WANG Da-hui; ZHENG Guo-xing

doi:10.3788/OPE.20132101.0013

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Suppression of ASE from excimer laser using cascaded UV electro-optical switch

Article | 更新时间：2020-08-12

- Suppression of ASE from excimer laser using cascaded UV electro-optical switch
- Optics and Precision Engineering Vol. 21, Issue 1, Pages: 13-19(2013)
- 作者机构：
  
  西北核技术研究所激光与物质相互作用国家重点实验室,陕西西安,710024
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20132101.0013
  CLC：
- Received：08 June 2012，
  
  Revised：06 September 2012，
  
  Published Online：24 January 2013，
  
  Published：15 January 2013
- 稿件说明：
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胡云赵学庆薛全喜王大辉郑国鑫. 由级联紫外电光开关控制准分子激光的自发辐射放大[J]. 光学精密工程, 2013,21(1): 13-19

HU Yun ZHAO Xue-qing XUE Quan-xi WANG Da-hui ZHENG Guo-xing. Suppression of ASE from excimer laser using cascaded UV electro-optical switch[J]. Editorial Office of Optics and Precision Engineering, 2013,21(1): 13-19
胡云赵学庆薛全喜王大辉郑国鑫. 由级联紫外电光开关控制准分子激光的自发辐射放大[J]. 光学精密工程, 2013,21(1): 13-19 DOI： 10.3788/OPE.20132101.0013.

HU Yun ZHAO Xue-qing XUE Quan-xi WANG Da-hui ZHENG Guo-xing. Suppression of ASE from excimer laser using cascaded UV electro-optical switch[J]. Editorial Office of Optics and Precision Engineering, 2013,21(1): 13-19 DOI： 10.3788/OPE.20132101.0013.

摘要

考虑高功率准分子激光系统的自发辐射放大（ASE）会导致主脉冲信号对比度下降，引起波形展宽和畸变，本文开展了级联双电光开关的研究来抑制ASE的产生并提高激光脉冲信号的信号对比度。探讨了电光开关的级联工作模式，分析了影响电光开关削波对比度的因素，进而提出采用级联工作方式来大幅度地提高削波对比度。在单电光开关的基础上，设计了级联电光削波的光路布局。其中，前一级电光开关的检偏器作为后一级的起偏器，电路则采用分立式以避免相互之间的串扰。采用级联双电光开关对低占空比预放大器进行了ASE控制实验。实验结果显示，级联双电光开关的削波对比度达到了104量级，而预放大器的放大输出信号对比度提高到106量级，此结果有利于激光脉冲信号在系统中后续放大级的进一步放大。

Abstract

A cascaded electro-optical(E-O) switch was studied to suppress Amplified Spontaneous Emission (ASE) and promote the signal contrast of the laser pulse

because the ASE could decrease the signal contrast ratio and widen the waveform and distortion in a high power excimer laser severely. The cascaded mode of the E-O switch was explored

the factors that effect on signal contrast ratio of the E-O switch were analyzed

then the work mode using the E-O switch cascaded was proposed to promote the contrast ratio of the switch. On the basis of a single switch

the cascaded E-O switch layout was designed. The analyzer of the first switch was used as the polarizer of the following one

and the driving power supply was installed discretely to avoid the crosstalk. An experiment on ASE suppression for the low duty cycle of a pre-amplifier was performed using a cascaded double E-O switch. The results show that the contrast ratio of the cascaded switch reaches 10

level and the signal contrast ratio of the preamplifier output pulse reaches 10

level

which is beneficial to the amplification of laser pulse signals in following amplifier stages of the system.

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references

LEHECKA T, LEHMBERG R H, DENIZ A V, et al.. Production of high energy, uniform focal profiles with the Nike laser [J]. Optics. Comm, 1995,117 :485-491.[2]OBENSCHAIN S P. The Nike KrF facility. proc of excimer lasers for fusion

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Related Institution

State Key Laboratory of Laser Interaction with Matter, Northwest Institute of Nuclear Technology

Qingdao Academy for Opto-electronics Engineering

College of Information Science and Engeering, Ocean University of China, Qingdao 266000, China

Navy Submarine Academy, Qingdao 266000, China

Chinese Academy of Sciences

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