Wu Ji-Liang, Wang Ting, Yang Yue-De, Xiao Jin-Long, Huang Yong-Zhen
Appl Opt. 2021 May 10;60(14):4177-4184. doi: 10.1364/AO.423912.
Optical frequency comb (OFC) and picosecond pulse generation are demonstrated experimentally based on a directly modulated AlGaInAs/InP square microcavity laser. With the merit of a high electro-optics modulation response of the microcavity laser, power-efficient OFCs with good flatness are produced. Ten 8-GHz-spaced optical tones with power fluctuation less than 3 dB are obtained based on the laser modulated by a sinusoidal signal. Moreover, the comb line number is enhanced to 20 by eliminating the nonlinear dynamics through optical injection locking. Owing to the high coherence of the OFC originating from the directly modulated microcavity laser, a 6.8 ps transform-limited pulse is obtained through dispersion compensation. The optical pulse is further compressed to 1.3 ps through the self-phase modulation effect in high nonlinear fiber.
基于直接调制的AlGaInAs/InP方形微腔激光器，通过实验演示了光学频率梳（OFC）和皮秒脉冲产生。凭借微腔激光器的高电光调制响应优点，产生了具有良好平坦度的高效功率OFC。基于由正弦信号调制的激光器，获得了十个频率间隔为8 GHz、功率波动小于3 dB的光频调。此外，通过光注入锁定消除非线性动力学，梳状线数增加到20。由于直接调制微腔激光器产生的OFC具有高相干性，通过色散补偿获得了6.8 ps的变换限制脉冲。通过高非线性光纤中的自相位调制效应，光脉冲进一步压缩至1.3 ps。
