基于CPLD设计实现单横单纵激光器种子注入纵模锁定

基于自滤波非稳腔、种子激光注入及CPLD控制的干涉法纵模锁定技术,研制出一套单横单纵激光器系统；对激光器的工作原理及纵模锁定电路设计进行了说明。该设计具有输出光束质量好,工作稳定,抗干扰性强的特点。该激光器经历了在强干扰环境中长时间的“烤机”实验,单纵模锁定概率达100%。     

Energy reduction:a technique for seed-injection locking of single-axial-mode Q-switched Nd:YAG laser

A new technique for seed-injection locking of single-axial-mode (SAM) Q-switched Nd:YAG laser is re- ported.The technique called energy reduction (ER) is utilized when SAM operation is locked to design its feedback scheme.This method ensures long-term 100% seed-injection locking performance and the pulsed SAM output energy can reach as high as 200 mJ.Both temporal and spatial interferometric experiments have been executed to confirm the SAM oscillation.     

High peak power first,second, and third order Stokes pulses based on intracavity self-stimulated Raman scattering lasers

<正>We obtain high peak power pulses in megawatt range of the first(1181 nm),second(1321 nm),and third order(1500 nm) Stokes radiation from self-conversion of the 1067-nm laser radiation based on Nd:KGW laser.The maximum output energy of the first order Stokes laser is 35.3 mJ,which is to our knowledge, the highest reported energy in an intracavity Q-switched laser.The third order Stokes pulse is obtained in an intracavity Q-switched laser.     

倍频过程对激光光束质量及空间分布的影响

为了研究倍频过程对激光光束质量及光束空间分布的影响,针对典型的高阶高斯光厄米-高斯光束,采用理论计算与实验相结合的方法,得出倍频过程中不同阶数的基频光束对倍频光光束空间分布及光束质量的影响。研究结果表明,随着基频光束模式变差,倍频光束质量严重恶化。而对于相同光束质量的基频基模光束,倍频光光束质量随着入射在倍频晶体上不同的基频光光斑半径基本不变。实验中得到半导体抽运掺钕钇铝石榴石内腔倍频激光器的绿光输出功率为49.5W,波长1064nm的基频光光束质量M2=4.93,波长532nm的倍频光光束质量M2=10.2。结果与理论基本相符。