All-Optical XOR Logic Gate Based on Self-Phase Modulation of a Semiconductor Optical Amplifier without an Additional Synchronized Clock

Hyuek Jae LEE  Chang-Soo PARK  

IEICE TRANSACTIONS on Communications   Vol.E84-B    No.2    pp.330-332
Publication Date: 2001/02/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fiber-Optic Transmission
all-optical XOR logic gate,  semiconductor optical amplifier (SOA),  self-phase modulation,  

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The authors propose and experimentally demonstrate an all-optical exclusive OR (XOR) logic gate based on self-phase modulation (SPM) of a semiconductor optical amplifier (SOA). The scheme is insensitive to the polarization of the input signal and requires no additional synchronized clock. The output of the XOR gate showed the contrast ratio of more than 17 dB for the input signal at 2.5 GHz.