Patent ID: 7792433
Filing Date: 2010-09-07
Classification: H04B,H04L

Abstract:
1. A system for generating an optical return-to-zero signal, the system comprising: a system for coding and signal processing, the system for coding and signal processing being configured to: receive an input electrical non-return-to-zero signal; process information associated with the input electrical non-return-to-zero signal; generate at least a first coded signal based on at least information associated with the input electrical non-return-to-zero signal; process information associated with the first coded signal; generate at least a first delayed signal based on at least information associated with the first coded signal, the first delayed signal being delayed with respect to the first coded signal by a first predetermined period of time; process information associated with the first coded signal and the first delayed signal; generate a first processed signal and a second processed signal based on at least information associated with the first coded signal and the first delayed signal; a first driver configured to receive the first processed signal and generate a first driving signal; a second driver configured to receive the second processed signal and generate a second driving signal; a light source configured to generate a light; an electro-optical modulator configured to receive the light, the first driving signal and the second driving signal, modulate the light with the first driving signal and the second driving signal, and generate an output optical signal; wherein: the output optical signal is an optical return-to-zero signal associated with a frequency chirp; the optical return-to-zero signal comprises a plurality of pulses; and the frequency chirp has a uniform sign for every pulse of the plurality of pulses; wherein the system for coding and signal processing is further configured to: generate a second coded signal; receive the second coded signal; process information associated with the second coded signal; generate a second delayed signal based on at least information associated with the second coded signal, the second delayed signal being delayed with respect to the second coded signal by a second predetermined period of time; process information associated with the second coded signal and the second delayed signal; and generate the first processed signal and the second processed signal based on at least information associated with the first coded signal, the first delayed signal, the second coded signal, and the second delayed signal; and wherein the system for coding and signal processing comprises: a first time delay device configured to receive the first coded signal and generate the first delayed signal; a second time delay device configured to received the second coded signal and generate the second delayed signal; a first amplifier configured to: receive the first coded signal and the first delayed signal; determine a first difference between the first coded signal and the first delayed signal; process information associated with the first difference; and generate the first processed signal based on at least information associated with the first difference; and a second amplifier configured to: receive the second coded signal and the second delayed signal; determine a second difference between the second coded signal and the second delayed signal; process information associated with the second difference; and generate the second processed signal based on at least information associated with the second difference.