电激励泛频HF化学激光器的实验研究  

Experiment Study of a Discharge-Driving HF Overtone Chemical Laser

作　　者：周琼[1] 袁圣付[1] 罗威[1] 王红岩[1] 姜宗福[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,湖南长沙410073

出　　处：《中国激光》2010年第9期2424-2427,共4页Chinese Journal of Lasers

基　　金：国家自然科学基金(10304025)资助课题

摘　　要：以一台电激励连续波HF化学激光器作为研究平台,根据振荡阈值条件和Rigrod理论,并参考国外泛频HF激光器的腔镜参数,选取了适当的膜层反射率,最后使用镀有波段选择性膜的泛频腔镜进行了实验。光轴取在H2喷注孔下游1 mm处,得到了3.5 W的泛频HF激光,泛频效率为10%,谱线成分为P20(6)和P20(7);60 cm处的光斑尺寸为10 mm×7 mm,激光模式为TEM00。实现泛频输出的同时伴有少量的基频输出,主要是因为镜面膜层质量的限制,而镀膜的技术水平也是目前研究泛频HF激光器的主要难点之一。另外,在泛频出光的重复性实验中仅获得瓦级的基频输出,谱线成分为P2(3)和P2(4),主要原因为腔镜膜层的退化。Working on a discharge-driving continous wave（CW） HF chemical laser,using the oscillating threshold condition and Rigrod theory,and considering with the data of overseas′ HF overtone chemical laser,the overtone cavity mirrors with band selectivity coating were chosen to study.3.5 W of overtone laser is obtained on the 1mm downstream station of H2 injecting orifices.The spot size at 60 cm distance is about 10 mm×7 mm,and the overtone efficiency is 10%.The spectra contain lines P20（6） and P20（7）,and the mode is TEM00.There is a little of fundamental laser going with overtone laser.The analysis of results indicates that this is mostly because of the bad coating of mirrors,which is also one of the difficulties to obtain the HF overtone laser,recently.When studying this experiment again,the laser only obtains many watts of fundamental power,the spectra contain lines P2（3） and P2（4）.And the possibility reason is optical coating degradation of resonator mirrors.

关 键 词：激光器 电激励HF激光器 泛频 腔镜 镜面膜层 膜层退化 

分 类 号：TN248.5[电子电信—物理电子学] O437[机械工程—光学工程]