Yokota Nobuhide, Abe Koichiro, Mieda Shigeru, Yasaka Hiroshi
Opt Lett. 2016 Mar 1;41(5):1026-9. doi: 10.1364/OL.41.001026.
This Letter demonstrates tailored optical frequency comb (OFC) generation using a LiNbO3 Mach-Zehnder modulator driven by a combination of first- and second-order harmonics of the RF signal. A quasi-rectangular-shaped OFC with less than 1 dB flatness among 11 lines was experimentally obtained when a slight second-order harmonic of the RF signal (0.1 times the half-wavelength voltage) was introduced. Good agreement was obtained between the measured and calculation results for OFCs. We discuss conditions to obtain flat OFCs using this method along with details concerning OFC conversion efficiency and bandwidth.
本信函展示了利用由射频信号的一阶和二阶谐波组合驱动的铌酸锂马赫-曾德尔调制器产生定制光学频率梳（OFC）的方法。当引入射频信号的轻微二阶谐波（半波长电压的0.1倍）时，通过实验获得了在11条谱线中平坦度小于1 dB的准矩形OFC。OFC的测量结果与计算结果吻合良好。我们讨论了使用该方法获得平坦OFC的条件以及有关OFC转换效率和带宽的详细信息。
