重复频率3Hz、100mJ高光束质量钕玻璃放大器的研制  

Fabrication of repetition frequency 3 Hz,100 mJ high-beam-quality Nd-glass amplifier

作　　者：唐熊忻[1,2,3] 樊仲维[1,3] 邱基斯[1,2,3] 连富强[1,2,3] 张晓雷[3] 赵天卓[1,3] 麻云凤[1,3] 苏欣[4] 

机构地区：[1]中国科学院光电研究院,北京100094 [2]中国科学院研究生院,北京100049 [3]北京国科世纪激光技术有限公司,北京100192 [4]北京理工大学光电学院,北京100081

出　　处：《光电子．激光》2012年第4期620-625,共6页Journal of Optoelectronics·Laser

基　　金：国家"863"计划重点(2009AA034701)资助项目

摘　　要：研制了具有放大纳秒方形激光脉冲的高光束质量、高稳定的激光二极管(LD)抽运的钕玻璃激光放大器。为了获得较高的输出能量,采用LD泵浦的"串联式双程放大"高增益组件进行能量放大。为了获得高光束质量的光斑,利用液晶空间光调制器(LCSLM)对光束近场分布进行空间整形,使之产生特定的空间分布,进而对后级放大器增益不均匀性进行光学预补偿。放大器工作波长为1 053nm,工作频率为3 Hz,输入1nJ的3ns方形激光脉冲,输出激光脉冲能量为100mJ、光束口径为10mm×10mm的方光斑,能量不稳定度小于2%(均方根),净增益大于109。光束的近场调制度小于1.3∶1,远场焦斑衍射极限小于2DL,远场角漂移小于9.5μrad。A high-beam-quality and high-stability all-solid-state Nd：glass amplifier with laser diode（LD） side-pumping applied to amplify a nanosecond laser pulse source has been developed in this paper.The maximum output energy can be obtained when high-gain components with serial two-pass LD pumping amplification are used.On the other hard,the liquid crystal spatial light modulator（LCSLM） is used to produce a particular spatial distribution in the near field to pre-compensate the gain uniformity of the latter amplifier in order to get high-quality spot.The operating wavelength and frequency are 1 053 nm and 3 Hz,respectively.When the amplifier is seeded with a 1 nJ and 3 ns flattened pulse,the output energy is 100 mJ with beam spot of 10 mm×10 mm,energy instability less than 2%（root-mean-square）,net gain more than 109.The modulation in the near field is less than 1.3∶1,the diffraction limit of focus spot in the far field is less than 2DL,and the far field angle shift is less than 9.5 μrad.

关 键 词：激光器 激光二极管(LD)抽运 钕玻璃 液晶空间光调制器(LCSLM) 光束质量 

分 类 号：TN248.1[电子电信—物理电子学]