Patent ID: 8306436

Claim:
An optical communications receiver comprising a fiber optic first input element through which a signal carrying information circulates, a local laser block, an optical detection block, and a demodulation block wherein the information-carrying signal of the optical fiber input and a beam of light generated by the local laser block are coupled and detected in the optical detection block, down-converting the optical signal that carries information into a base-band electrical signal that carries information, which is processed in a block of electrical demodulation, that performs a differential demodulation of its in-phase and quadrature components, combining them later, wherein the block of electrical demodulation separates the in-phase component of the quadrature component using the signal generated in a signal conditioning block of a regeneration block, and wherein the receiver further comprises a phase shifter for phase shifting the output of the signal conditioner to generate a phase alteration signal synchronized with the bit time, said phase shifter being placed between the regeneration block and the local laser block or being contained by said signal conditioning block.