Patent ID: 6396586
Filing Date: 2002-05-28
Classification: H04B

Abstract:
An apparatus for transmitting an optical signal through a medium having an ntth order nonlinearity, the optical signal having a duty cycle comprising an active portion and an inactive portion, said apparatus comprising:at an input of the medium, a combining interferometer having a first split-beam delay factor and a first split-beam weighting factor; and at an output of the medium, a subtracting interferometer having a second split-beam delay factor and a second split-beam weighting factor; wherein said first split-beam delay factor corresponds to a duration of the active portion of the optical signal; wherein said second split-beam delay factor is set equal to said first split-beam delay factor; and wherein said second split-beam weighting factor is set equal to said first split-beam weighting factor raised to the nth power; whereby, during an interval corresponding to the active portion of the duty cycle, an output of said subtracting interferometer is proportional to a delayed version of the optical signal and is free of nth-order nonlinearities induced by the medium.