The effect of gain compression on the modulation characteristics of 1.55µm distributed feedback laser

摘要

The influence of gain compression on the modulation characteristics of a distributed feedback (DFB) laser is investigated. We simulate the single mode 1.55μm distributed feedback laser and the results show that the resonance frequency is reduced by gain compression. This limits the laser bandwidth to frequencies well below the relaxation oscillation frequency. It is shown that higher the maximum gain, lower the effects of gain compression. Therefore, by optimizing the parameters that control the maximum gain, the maximum laser bandwidth can be increased.