Russell E, Corbett B, Garcia Gunning F C
Opt Express. 2022 Feb 14;30(4):5213-5221. doi: 10.1364/OE.446171.
This article shows a dual frequency comb in the 2 µm wavelength region using mutually injection locked gain-switched semiconductor lasers. Strained InGaAs multi-quantum-well discrete mode lasers and gain switching were used to generate two optical frequency combs with repetition rates of 2 GHz and 2.0001 GHz respectively, centred at 2.002 µm. Each optical comb spanned approximately 100 GHz. Through mutual injection locking to an edge comb line common in both combs, a phase locked dual frequency comb was demonstrated with 44 beating tones unique to single comb line pair interactions. This scheme allows for the comb information to be compressed into a 5 MHz detection bandwidth and captured with millisecond acquisition times, which could be of benefit to a number of sensing applications.
本文展示了一种在2 µm波长区域使用相互注入锁定增益开关半导体激光器的双频梳。采用应变InGaAs多量子阱离散模式激光器和增益开关分别产生重复频率为2 GHz和2.0001 GHz、中心波长为2.002 µm的两个光学频率梳。每个光学频率梳的跨度约为100 GHz。通过相互注入锁定到两个频率梳中共有的一条边缘梳状线，演示了一种锁相双频梳，其具有44个单梳状线对相互作用特有的拍频音调。该方案允许将频率梳信息压缩到5 MHz的检测带宽中，并在毫秒级采集时间内捕获，这可能对许多传感应用有益。
