Dynamic switching response of semiconductor ring lasers to NRZ and RZ injection signals

作者：Yuan Guohui^*; Wang Zhuoran; Yu Siyuan

来源：IEEE Photonics Technology Letters, 2008, 20(9-12): 785-787.

DOI：10.1109/LPT.2008.921112

• optical bistability
• optical injection
• semiconductor lasers
• semiconductor ring laser (SRL)
• switching dynamics

Dynamic response of semiconductor ring lasers (SRLs) to external optical injection with nonreturn-to-zero (NRZ) and return-to-zero (RZ) waveforms is investigated using a model including linear and nonlinear mode coupling. The switching characteristics are simulated under various device sizes, injection power levels, and frequency detuning. For NRZ, the switching time reduces with decreasing SRL radius, which has a reasonable agreement with the current experimental results. It is also demonstrated that RZ pulse with duration of several picoseconds can reliably switch 6-mu m radius SRL over a detuning range of more than 100 GHz, with the end state self-sustained after switching.

• 出版日期2008-6