Patent ID: 8358937
Filing Date: 2013-01-22
Classification: H04B

Abstract:
1. A system for reducing clipping in a modulated optical system, the system comprising: a laser including an RF input configured to receive a multichannel RF signal and an optical output to provide a modulated optical signal in response to the multichannel RF signal, the multichannel RF signal including a superposition of multiple modulated carriers and occupying a bandwidth across a range of frequencies of the multiple modulated carriers; a peak detector configured to receive the multichannel RF signal and to detect at least one peak in the multichannel RF signal; and a pulse generator coupled to the peak detector, the pulse generator being configured to generate a series of clipping correction pulses in response to at least one detected peak and to combine the clipping correction pulses with the multichannel RF signal, wherein consecutive clipping correction pulses in the series of clipping correction pulses are spaced at an interval corresponding to an interval between consecutive negative peaks in the multichannel RF signal such that the clipping correction pulses coincide with a corresponding series of subsequent negative peaks in the multichannel RF signal and increase an amplitude of the RF signal at the time of respective ones of the corresponding series of subsequent negative peaks to prevent the subsequent negative peaks in the multichannel RF signal from causing clipping when the laser receives the multichannel RF signal combined with the clipping correction pulses.