Patent ID: 7248400
Filing Date: 2007-07-24
Classification: G02F

Abstract:
1. An apparatus for implementing an all-optical OR logic gate comprising: an optical pulse generator configured to generate an optical pulse signal; a Mode-Locked Fiber Laser (MLFL) configured to generate first and second input signal patterns by operating the optical pulse generator; a first optical splitter configured to divide light, which is output from the MLFL, at a ratio of 50 to 50; first optical delay line means for acquiring time delay of light output from the first optical splitter; optical control means for controlling intensity and polarization of the light output by the first optical splitter; a first optical coupler configured to couple light output from the first delay means with light output from the optical control means, and generating the first input signal pattern as a probe signal; a second optical splitter configured to divide light, which is output from the first optical coupler, at a ratio of 50 to 50; second optical delay line means for delaying light output from the second optical splitter, and generating the second input signal pattern; a third optical splitter configured to divide the second input signal pattern at a ratio of 50 to 50; an Erbium Doped Fiber Amplifier (EDFA) configured to amplify divided part of the second input signal pattern, which is obtained by the third optical splitter, as a pump signal; a Semiconductor Optical Amplifier (SOA) configured to couple pump signal with the probe signal in opposite directions to perform the all-optical OR logic operation; a second optical coupler configured to couple a signal output from the SOA with the second input signal pattern; and an optical analyzer configured to divide and analyzing light output from the second optical coupler.