BURST SIGNAL EXTINCTION RATIO CONTROL CIRCUIT, INTEGRATED CIRCUIT THEREOF, BURST SIGNAL EXTINCTION RATIO CONTROL METHOD, COMPUTER PROGRAM, AND LASER DIODE DRIVE CIRCUIT

摘要

A circuit configuration for constantly maintaining the extinction ratio of a laser diode for converting a high-speed burst signal into a light signal. With this configuration, control is performed so that a difference between a burst #1 average light power making the modulation current Im as a normal value and a burst #2 average light power which has slightly increased the modulation current is equal to a reference value, and a burst #3 average light power making the modulation current Im as a normal value is equal to a reference value.