Opt Lett. 2018 Sep 1;43(17):4144-4147. doi: 10.1364/OL.43.004144.
An external modulation method is proposed and experimentally demonstrated for the generation of linearly chirped light over broadband with narrow linewidth. Our chirped light source is a combination of an optical recirculating frequency shifter loop and an optical frequency linear sweeper. A linearly chirped light over a range of 200 GHz at a chirp rate of 3.6×10 Hz/s is generated. The instantaneous linewidth of the chirped light is estimated to be less than 50 kHz.
提出并实验验证了一种用于在宽带范围内产生具有窄线宽的线性啁啾光的外调制方法。我们的啁啾光源是光学循环频移器环路和光学频率线性扫频器的组合。在 3.6×10 Hz/s 的啁啾率下产生了 200GHz 范围内的线性啁啾光。啁啾光的瞬时线宽估计小于 50kHz。
