Patent ID: 7302191
Filing Date: 2007-11-27
Classification: H04B

Abstract:
1. An optical transmitter comprising: a continuous wave optical source for generating an optical signal having a carrier frequency component; a clock modulator for performing a clock modulation upon said optical signal using a clock signal to generate a clock-modulated signal including first double-sideband components and suppressing at least said carrier frequency component; and a data modulator for performing a data modulation upon said clock-modulated signal using a data signal, said clock signal having a half frequency of that of said data signal, wherein said clock modulator comprises a single-end phase modulator for performing said clock modulation upon said optical signal using said clock signal to generate a phase-modulated signal, and a first tap type optical filter for suppressing said carrier frequency component and 2n-th (n=1, 2, . . . ) double-sideband components of said phase-modulated signal to generate said clock-modulated signal, and wherein said clock modulator and said data modulator are on a single same substrate.