Patent ID: 7957653
Filing Date: 2011-06-07
Classification: G02F,H04B

Abstract:
1. An optical frequency shift keying modulation system comprising: a first sub Mach-Zehnder waveguide (MZ a second sub Mach-Zehnder waveguide (MZ a main Mach-Zehnder waveguide (MZ a first electrode (electrode A) of the first sub Mach-Zehnder waveguide (MZ a second electrode (electrode B) of the second sub Mach-Zehnder waveguide (MZ a third electrode (electrode C) of the main Mach-Zehnder waveguide (MZ a signal source for applying either one or both of a modulation signal and bias voltage to the first electrode, the second electrode and the third electrode; and an output signal phase adjusting part for adjusting a phase difference between an upper side band signal and a lower side band signal, the upper side band signal and the lower side band signal being outputted from the output part.