Narrow linewidth parallel hybrid-integrated optical injection locking DFB laser

摘要

A parallel hybrid-integrated optical injection locking (PHOIL) DFB laser with narrow linewidth is experimentallydemonstrated by using REC technology. The linewidth of the PHOIL DFB laser is significantly narrowed under theinjection locking state. The linewidth of the PHOIL DFB laser is measured to be under 100 kHz, compared with 1034.2kHz under free running state. The narrowest linewidth of the PHOIL DFB laser can be as low as 31.9 kHz. The nonlineardistortions of the PHOIL DFB lasers, including third-order intermodulation distortion (IMD3) and spurious-free dynamicrange (SFDR), are also suppressed significantly. The IMD3 is reduced by 4.33 dB and SFDR is also increased from77.63 dB·Hz~(2/3) to 82.71 dB·Hz~(2/3).