Opt Lett. 2018 Jun 1;43(11):2507-2510. doi: 10.1364/OL.43.002507.
We present a continuously tunable optical frequency comb generator (OFCG), with comb lines spanning over 3.8 THz which, to the best of our knowledge, is the widest span yet reported for a single-phase modulator OFCG system. The line spacing, exactly determined by a microwave reference, can be continuously tuned and, by heterodyning two lines, enables the generation of a continuously tunable electrical signal from 122.5 GHz to >2.7 THz. The composite noise of the heterodyne between two lines has been measured up to a record frequency of 300 GHz and is -75 dBc/Hz at 10 kHz offset at 300 GHz, limited by the multiplied phase noise of the reference synthesizer.
我们提出了一种连续可调谐的光学频率梳发生器（OFCG），其梳状线跨越 3.8THz，据我们所知，这是迄今为止报道的单个相位调制器 OFCG 系统中最宽的跨度。线间距由微波参考精确确定，可连续调谐，并通过混频两条线，可从 122.5GHz 到>2.7THz 产生连续可调谐的电信号。已测量了两条线之间的混频的复合噪声，在 300GHz 时的记录频率高达 300GHz，在 300GHz 时的 10kHz 偏移处的噪声为-75dBc/Hz，受到参考合成器的倍频相位噪声的限制。
