Patent ID: 7881618
Filing Date: 2011-02-01
Classification: H04L

Abstract:
1. A method for performing m-ary phase-shift keying modulation, the method comprising: providing at least a first signal and a second signal, the first signal and the second signal being characterized by a first signal strength level; attenuating the second signal to provide a third signal, the third signal being characterized by a second signal strength level, the third signal strength level being at approximate 50% of the first signal strength level; coupling the first signal to a first bias voltage to provide a fourth signal; coupling the third signal to a second bias voltage to provide a fifth signal; providing a sixth signal by combing the fourth signal and the fifth signal; providing a light; providing a modulated light signal by performing amplitude modulation on the light, the modulation being associated at with at least the sixth signal; and performing phase-shift keying modulation on the amplitude-modulated light signal using an optical amplifier, the optical amplifier being characterized by an amplitude/phase characteristic.