The RF Circuit Embedded in DFB Laser Negative Effect Under Gain-Switching Operation
内置RF电路对增益开关工作的不利影响

The abnormal spectrum phenomenon of distributed feedback(DFB) laser embedded with RF circuit generates under gain-switching operation was analyzed.Time-domain and frequency-domain output of the laser with normal condition(small signal driving) and gain-switched condition(larges signal driving),were compared and respectively analyzed.The results show that instantaneous invalidation of the DFB laser under gain-switching operation directly causes multi-wavelength spectrum phenomenon.