Patent ID: 7526206
Filing Date: 2009-04-28
Classification: H04B

Abstract:
1. A system for communicating an analog input signal as a modulated binary laser signal over an optical communication medium recovered as a digital output signal, the system comprising, a sigma delta modulator for receiving the analog input signal and modulating the analog signal into a modulated symbol signal, a transmitter for converting the modulated symbol signal into the modulated binary laser signal, and for transmitting the modulated binary laser signal over the optical communication medium, the modulated binary laser signal having a pulse width having a duration representative of the analog input signal, a receiver for receiving and detecting the pulse width of modulated binary laser signal for providing a received symbol signal, and a digital filter for filtering the symbol signal into the digital output signal, wherein the transmitter comprises, a symbol to binary converter for converting the modulated symbol signal from the sigma delta modulator into a converted digital signal, and a pulse width modulator for modulating the laser signal by the converted digital signal into the modulated binary laser signal as a pulse width binary modulated laser signal communicated over the optical communication medium.