OPTICAL APPARATUS UTILIZING MODULATION BASED ON A TERTIARY DRIVE SIGNAL, OPTICAL TRANSMITTER, AND OPTICAL TRANSMISSION SYSTEM

摘要

An optical apparatus provided with an optical modulator having an periodic characteristic for input drive signal to output light, and modulating an input light into a signal light based on a tertiary drive signal with a bias level controlled to a level corresponding to a bottom of the periodic characteristic providing a minimum optical output; and a controller controlling the level of the signal light by controlling the amplitude of the a tertiary drive signal based on the monitored level of the signal light.