OPTICAL FREQUENCY COMB GENERATOR AND OPTICAL PULSE GENERATOR USING THE SAME, AND OPTICAL FREQUENCY COMB GENERATING METHOD AND OPTICAL PULSE GENERATING METHOD USING THE SAME

摘要

PPROBLEM TO BE SOLVED: To provide an optical frequency comb generator and an optical pulse generator using it, for precisely controlling the drive conditions of an optical frequency comb without complicating a configuration related to control or increasing costs, and to provide an optical frequency comb generating method and an optical pulse generating method using it. PSOLUTION: The optical frequency comb generator includes two light modulation parts 41, 42 for independently modulating light waves propagated through two branch waveguides of a Mach-Zehnder optical waveguide, and a phase adjusting part 43 for controlling the phase difference of the propagate light waves. The optical frequency comb generator includes: an amplitude adjustment means 22 for adjusting a voltage amplitude of an RF signal applied to at least one of the light modulation part; a monitoring means 21 for monitoring the intensity of output light; and a bias control circuit 20 for changing the differences in the voltage amplitudes of the RF signal applied to each light modulation part by controlling the amplitude adjustment means, detecting the change of the output light corresponding to the change of a voltage amplitude differences from the output signals of the monitoring means, controlling a phase adjusting part on the basis of a detected result and adjusting the phase difference. PCOPYRIGHT: (C)2011,JPO&INPIT