Patent ID: 8041232
Filing Date: 2011-10-18
Classification: H04B

Abstract:
1. An optical transmitter for transmitting optical pulses which are phase-modulated and intensity-modulated, comprising: a light source for generating optical pulses; a double-pulse generator for generating double pulses from an optical pulse, wherein the double pulses are a temporally separated optical pulse pair; a branching section for branching each of the double pulses into a first path and a second path; a first optical modulator provided on the first path; a second optical modulator and a third optical modulator which are provided in series on the second path; and a combining section for combining double pulses having traveled through the first path and double pulses having traveled through the second path to generate an output double pulses, wherein each of the first optical modulator and the second optical modulator performs either relative intensity modulation or relative phase modulation between double pulses passing through, wherein the third optical modulator performs relative phase modulation between double pulses passing through.