Hatanaka Shuhei, Sugiyama Kazuhiko, Mitaki Masatoshi, Misono Masatoshi, Slyusarev Sergey N, Kitano Masao
Appl Opt. 2017 Apr 20;56(12):3615-3621. doi: 10.1364/AO.56.003615.
We phase lock an octave-spanning optical frequency comb, generated using a mode-locked titanium-sapphire laser and a photonic-crystal fiber, to a continuous-wave laser line-narrowed to a reference cavity. To phase lock the pulse-repetition frequency, the cavity length of the mode-locked laser is controlled by using a fast piezoelectric-actuated mirror of a servo bandwidth up to 80 kHz. The residual phase noise is 0.35 rad, and 89% of the power is concentrated to the carrier. To apply the system to optical frequency-ratio measurements and to evaluate the phase locking, a simultaneous frequency measurement of the beat between the other mode of the comb and another laser line-narrowed to a different resonance of the common reference cavity is demonstrated.
我们将一个使用锁模钛宝石激光器和光子晶体光纤产生的倍频程光学频率梳与一个线宽窄至参考腔的连续波激光器进行锁相。为了锁相脉冲重复频率，使用一个伺服带宽高达80kHz的快速压电驱动镜来控制锁模激光器的腔长。残余相位噪声为0.35弧度，89%的功率集中在载波上。为了将该系统应用于光学频率比测量并评估锁相情况，展示了对频率梳的另一个模式与另一个线宽窄至公共参考腔不同共振的激光器之间拍频的同时频率测量。
