GAIN SATURATION COEFFICIENTS OF STRAINED-LAYER MULTIPLE QUANTUM-WELL DISTRIBUTED FEEDBACK LASERS

The gain saturation coefficients are measured for strained and unstrained multiple quantum-well distributed feedback lasers. The gain saturation coefficient depends on the deviation of the laser's TM mode gain peak wavelength from its TE mode gain peak wavelength delta-lambda, which is concerned with the strain on the active-layer wells. It is also found that the gain saturation coefficient increases with strain on the active-layer wells.