TRAVELING WAVE OPTICAL MODULATOR AND ITS REGULATING METHOD

摘要

A traveling wave optical modulator in which occurrence of jitter is suppressed when it is driven through a driver, and its regulating method; especially in which the degree of freedom is enlarged in the combination of the driver and the traveling wave optical modulator and jitter can be suppressed effectively even after they are combined, and its regulating method. The traveling wave optical modulator comprises a substrate exhibiting electrooptic effect, an optical waveguide formed on the substrate, and a modulation electrode performing modulation control on a light wave propagating through the optical waveguide, characterized in that the traveling wave optical modulator is connected with a driver performing drive control thereof, and the frequency characteristics (b) of electrooptic conversion response of the traveling wave optical modulator is regulated to correct the frequency characteristics (a) of gain of the driver. Preferably, regulation of the frequency characteristics of electrooptic conversion response is characterized by the regulation of at least one of the impedance of the modulation electrode or the impedance of a termination resistor.