Intermodulation and Harmonic Distortion in GaAsP Distributed Feedback Lasers.

Measurements and calculations of intermodulation and harmonic distortion in 1.3microns high speed distributed feedback lasers at multiGHz modulation frequencies are presented. The observed frequency and power dependence of the distortion levels are well explained by a perturbation analysis of the laser rate equations using parameters derived from the measured small signal optical response of the laser.