高功率LDA紧密侧面抽运Nd:YLF两级双程离轴放大系统实验研究

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Experimental study on Nd:YLF twostage doublepass offaxis amplifying system tightlysidepumped by high power LD array

1.
College of Electronic Information,Sichuan University,Chengdu 610064 China;
2.
Research Center of Laser Fusion,CAEP,P.O.Box 919 988,Mianyang 621900,China;
3.
College of Precision Instrument and Optoeletronics Engineering,Tianjin University,Tianjin 300072,China

摘要: 介绍了一台10mm口径两级双程离轴放大系统，实现了对5mm×5mm口径光束的激光放大，耦合系统采用高功率LDA紧密侧面直接抽运棒状Nd:YLF方式。分析并实验研究了在不同抽运电流、放大脉冲与放大器LDA抽运时刻的不同延时及不同注入能量条件下，放大系统及光束每次放大时放大特性的规律。实验得到：在放大系统5mm×5mm软光阑处注入1.58mJ能量时，放大系统可输出129.2mJ能量，能量提取效率达到19.5%，满足该系统的设计指标。
- LDA紧密侧面抽运 /
- Nd:YLF激光放大器 /
- 两级双程离轴放大 /
- 放大特性
Abstract: A 10mm caliber twostage doublepass offaxis amplifying system was described, and the 5mm×5mm caliber laser pulse was amplified. The coupling system of high power LD array tightside directlypumping Nd:YLF rod was used. The characters of amplifying system and each amplification in different pump currents and input energy were analyzed by theory and experiment. In experiment when 1.58mJ energy was injected into the soft 5mm×5mm diaphragm, 129.2mJ energy was output, and energy extract efficiency was 19.5%.
- lda tightlysidepumping /
- nd:ylf laser amplifier /
- twostage doublepass offaxis amplification /
- amplifying system

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