用于定向红外对抗的中波红外激光器技术

Technology of MWIR laser in directed infrared countermeasure systems

针对定向红外对抗系统对中波红外激光器在激光波段、激光功率、激光束散角、激光重复频率以及调制波形等方面的具体要求,通过对光泵半导体激光器、量子级联激光器和基于光学参量振荡的固体以及光纤激光器的技术特点与发展现状的分析比较,和对双折射相位匹配与准相位匹配的特点和最新发展动态的梳理,提出用高功率高光束质量的1 064nm固体激光器或光纤激光器泵浦基于掺氧化镁的周期极化铌酸锂晶体(PPMgLN)的光学参量振荡器的中波红外激光器方案,其波段转换效率可达到16%以上。

Aiming at the special technique requests of directed infrared countermeasure systems for mid‐wave infrared (MWIR) lasers in laser wavelength ,power ,divergence ,repetition fre‐quency and modulation pattern ,the technique characteristics and present developing situation of the optically pumped semiconductor disk laser ,the quantum cascade laser ,the optical‐para‐metric‐oscillator‐based solid‐state laser and fiber laser were analyzed .The characteristics and new developments of the birefringent phase matching and the quasi‐phase matching were also summarized .A technique project of MWIR lasers was proposed by using a solid‐state laser or a fiber laser with the wavelength of 1 064 nm and high power good beam quality to pump an opti‐cal parametric oscillator based on the crystal of periodically poled lithium niobate with MgO‐doping(PPMgLN) .The converting efficiency above 16% on wavelength could be obtained .