MODULATION SYSTEM CAPABLE OF ERASING THIRD ORDER COMPONENT

摘要

It is an object of the present invention to provide an optical modulation system capable of suppressing a carrier component (f 0 ) and a high order component (such as a second order component (f 0 ± 2f m )). The optical modulation system includes Mach-Zehnder waveguide (8), a first intensity modulator (9) provided on a first arm (4), a second intensity modulator (10) provided on a second arm (5), a first main Mach-Zehnder electrode (MZ CA electrode) (13a), and a second main Mach-Zehnder electrode (MZ CB electrode) (13b). Non-desired components propagating the respective arms are made to have reverse phase before optical signals are combined, whereby the optical modulation system is capable of suppressing the non-desired components when the optical signals are combined.