Patent ID: 6574022
Filing Date: 2003-06-03
Classification: G02B,H04B

Abstract:
An optical signal receiver for reception of an optical signal and conversion of that signal to an electrical signal, the receiver comprising:an optical amplifier capable of receiving the optical signal; an optical splitter optically coupled to the optical amplifier and having two optical outputs; an optical sensor coupled to the optical splitter, the optical sensor having: a first output terminal; a second output terminal; a first photo detector which produces an electrical signal in response to a light input, coupled between the first and second output terminals, the first photo detector element being optically coupled to the first output of the optical splitter; and a second photo detector which produces an electrical signal in response to a light input, coupled between the first and second output terminals and in parallel with the first photo detector, the second photo detector element being optically coupled to the second output of the optical splitter, wherein the signal from the second output of the optical splitter is delayed relative to the signal from the first output; and wherein the electrical signal of the second photo detector is opposite in polarity to that of the electrical signal of the first photo detector canceling out at least some of first signal.