Direct Modulation Characteristics of Semiconductor Laser Diodes
Abstract
Direct pulse modulation rates of semiconductor laser diodes are limited by an unwanted oscillation, that is, the relaxation oscillation, which is governed by a nonlinear laser rate equation. An investigation of the nonlinear rate equation extracts the condition wherein the laser diode does not generate the unwanted oscillation at all. The nonlinear rate equation can be solved under this condition. The analytical solution, which may be a ‘skeleton solution’ of the general rate equation, shows well the direct pulse modulation characteristics and is verfied by an analog computer. In an attempt to understand the properties of the unwanted oscillation, exact equivalent circuit representations of the nonlinear rate equation with and without a spontaneous emission are given.
 Publication:

Japanese Journal of Applied Physics
 Pub Date:
 January 1977
 DOI:
 10.1143/JJAP.16.117
 Bibcode:
 1977JaJAP..16..117D
 Keywords:

 Analog Simulation;
 Equivalent Circuits;
 Light Modulation;
 Pulse Modulation;
 Relaxation Oscillators;
 Semiconductor Lasers;
 Analog Computers;
 Laser Modes;
 Light Emitting Diodes;
 Nonlinear Equations;
 Nonlinear Optics;
 Spontaneous Emission;
 Volterra Equations;
 Lasers and Masers