注入锁定半导体锁模激光器的时序抖动特性（英文）

Timing Jitter in Pulsed Injection Locking of a Passively Mode-locked Semiconductor Laser

采用简化的孤子微扰模型方程组,研究了注入锁定时被动锁模半导体激光器的时序抖动噪声特性.研究发现,当注入锁定的耦合系数为10-3 ps^(-1)时,在100kHz到10GHz的频率范围内,从锁模激光器的时序抖动噪声可从自由运转情况下的皮秒量级(3.83ps)下降至几十飞秒.还讨论了主从锁模激光器的稳态相位差、注入耦合系数、线宽增强因子等参数对时序抖动噪声特性的影响.计算结果表明,时序抖动对稳态相位差不敏感,而耦合系数的变化对其则有显著影响;此外,线宽增强因子越小,时序抖动噪声越小.

The effects of injection locking on the timing-jitter noise properties of a passively mode locked semiconductor laser are investigated theoretically via a set of simplified soliton perturbation equations.We find that,with injection coupling coefficient of 10^-3 ps^-1,the timing-jitter noise of the slave mode-locked laser can be reduced from a few picoseconds(3.83 ps)to a few femtoseconds in the frequency range from 100 kHz to 10 GHz.We also discuss the impacts of the steady state phase difference between the injection and slave pulses,coupling coefficient,and linewidth enhancement factor on the timing-jitter noise.Calculations show that timing jitter is insensitive to the phase difference while coupling coefficient has a strong effect on the timing jitter,and a smaller linewidth enhancement factor leads to better timing jitter performance.