HF-DF双波段激光器腔内基态分子光吸收对输出性能的影响  

Influence of Photon Absorption of Ground State Molecules in Resonator Cavityof HF-DF Dual-Band Chemical on Laser Output Performance

作　　者：孙旭[1] 袁圣付[1] 罗威[1] 闫宝珠[1] 

机构地区：[1]国防科技大学光电科学与工程学院,湖南长沙410073

出　　处：《中国激光》2013年第8期18-23,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(10304025;10974255)

摘　　要：开展了HF/DF激光器谐振腔内基态分子光吸收对其输出性能影响的实验研究,测量并分析了从不同位置注入H2/D2时激光器的输出功率和光谱变化。结果表明:振动基态HF(ν=0)/DF(ν=0)分子通过单光子共振机制吸收1P支谱线,通过双光子共振机制吸收2P支谱线;振动-转动激射带间存在一定程度的级联跃迁效应;在基态分子与激发态分子数量相当(1···1)的情况下,HF激光器输出功率降低了50%左右,DF激光器输出功率降低了90%左右;利用传统的燃料组合研制燃烧驱动HF-DF双波段化学激光器是不可行的。Influence of photon absorption of ground state molecules in resonator cavity on HF-DF dual-band chemical laser output performance is investigated through experiments. Variations of spectra and output powers of HF laser and DF laser operated with different positions of H2/D2 injection are measured and analyzed. The results show that the spectral lines of IP （the P-branch transition between vibrational states of ~~ 1--~=0） are absorbed by the ground state molecules through the mechanism of single-photon resonance absorption. The spectral lines of 2P （the P-branch transition of ~= 2--~,----1 ） are absorbed by the ground state molecules through the mechanism of double-photon resonance absorption one by one. Cascading transition effect of lasing band between vibration-rotational states exists in some extent. Output power of HF laser decreases by approximately 50%, and output power of DF laser decreases by approximately 90% when the amount of ground state molecules and the amount of excited state molecules are equivalent. Traditional fuel compositions are not applicable for developing combustor-driven HF-DF dual-band chemical lasers.

关 键 词：激光器 氟化氢激光器 氟化氘激光器 光吸收 双波段激光 

分 类 号：TN012[电子电信—物理电子学]