在迈克尔逊腔中实现两个量子级联激光器的相干合成。

Coherent combining of two quantum-cascade lasers in a Michelson cavity.

机构信息

Thales Research and Technology, 1 Avenue Augustin Fresnel, 91767 Palaiseau Cedex, France.

出版信息

Opt Lett. 2010 Jun 1;35(11):1917-9. doi: 10.1364/OL.35.001917.

DOI:10.1364/OL.35.001917

PMID:20517461

Abstract

We developed a Michelson-type cavity to achieve coherent combining of two quantum-cascade lasers, emitting at around 4.5microm. We report a cw combining efficiency of 85% (up to 91% near threshold) with good beam quality (M(2)<1.4). Despite the interferometric nature of the coupling mechanism, this type of cavity can withstand disturbance from the laboratory environment without significant power fluctuations. Finally, the spectral behavior and the output power dependence on current are explored.

摘要

我们研制了一种迈克尔逊型腔，以实现两个发射波长约为 4.5μm 的量子级联激光器的相干组合。我们报道了 85%的连续波组合效率（接近阈值时高达 91%），光束质量良好（M²<1.4）。尽管耦合机制具有干涉性质，但这种类型的腔可以在不受实验室环境干扰的情况下承受，且功率波动不大。最后，我们还探索了光谱行为和输出功率对电流的依赖性。