Frougier Julien, Baili Ghaya, Sagnes Isabelle, Dolfi Daniel, George Jean-Marie, Alouini Mehdi
Opt Express. 2015 Apr 20;23(8):9573-88. doi: 10.1364/OE.23.009573.
In this paper we report birefringence measurements of an optically pumped (100)-oriented InGaAs/GaAsP multiple quantum well (MQWs) Vertical External Cavity Surface Emitting Laser (VECSEL) in oscillating conditions. The proposed technique relies on the measurement in the microwave domain of the beatnote between the oscillating mode and the amplified spontaneous emission of the cross-polarized non-lasing field lying in the following longitudinal mode. This technique is shown to offer extremely high sensitivity and accuracy enabling to track the amount of residual birefringence according to the laser operation conditions. The experience fits within the broader framework of polarization selection in spin-injected lasers.
在本文中，我们报告了在振荡条件下对光泵浦（100）取向的InGaAs/GaAsP多量子阱（MQW）垂直外腔面发射激光器（VECSEL）的双折射测量。所提出的技术依赖于在微波域中测量振荡模式与位于后续纵向模式的交叉极化非激射场的放大自发辐射之间的拍频。结果表明，该技术具有极高的灵敏度和准确性，能够根据激光运行条件追踪残余双折射量。该实验符合自旋注入激光器中偏振选择的更广泛框架。
