Abstract
We analyze dynamic operation of planar circular grating DFB/DBR laser with phase shift. In our theoretical model, we take into account the spatial hole burning effect, the transverse and longitudinal field distribution. It is found the proper value and position of additional phase shift affects the parameters of relaxation oscillations: damping rate coefficient and frequency, and the 3-dB modulation bandwidth. Moreover, for certain geometry of the structure the mode selectivity can be improved.
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