ring resonator coupled m-z all-optical switch by using a pumped nonlinear directional coupler
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abstract
we propose a new ring resonator side-coupled m-z interferometer all-optical switch throughthe pumped nonlinear directional coupler. by controlling pump power p to lead the coupler reflectivityr approaching to 1, the resonator finesse will be enhanced dramatically, and then the minimumswitching power in silica-based practice devices can be obtained. as a sample, we use a nonlinearcoupler made by two erbium-doped fibers, and launch a 514.5nm-pump light into one of the cores tomake the reflective- index difference between two cores. based on the asymmetric-coupler theory, wesimulate the relationship between r and p , and show that the required pump power is only 0.8mwfor r →1 .
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Journal title:
iranian journal of science and technology (sciences)ISSN 1028-6276
volume 28
issue 2 2004
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