IMRA America Inc., 1044 Woodridge Avenue, Ann Arbor, Michigan 48105, USA.
Opt Lett. 2012 Oct 1;37(19):4083-5. doi: 10.1364/OL.37.004083.
We demonstrate coherent phase locking of a room-temperature continuous-wave quantum cascade laser (QCL) at 9.1 μm to a Tm-fiber laser frequency comb centered at 2 μm, with an integrated residual phase error of 0.9 rad (30 mHz to 1.5 MHz). This resulted in a QCL linewidth reduction from 525 to 25 kHz at 1 ms observation time, limited by the linewidth of the free-running frequency comb.
我们演示了室温连续波量子级联激光（QCL）在 9.1μm 处与中心位于 2μm 的 Tm 光纤激光频梳的相干相位锁定，集成残余相位误差为 0.9rad（30mHz 至 1.5MHz）。这导致在 1ms 的观测时间内，QCL 的线宽从 525kHz 降低到 25kHz，其限制因素是自由运行频梳的线宽。
