Abstract
We present analytical results, based on a wavetheoretical approach, on the lasing characteristics of a distributed feedback (DFB) laser with nonuniform structure, which the grating period gradually varies (called “chirped grating”). Numerical examples show that the symmetrical chirping profile is superior to the antisymmetrical one from the view of single mode lasing and also predict that the chirped DFB can suppress spatial hole burning at high power operations.
