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Analysis of high-contrast all-optical dual-wavelength switching in asymmetric dual-core fibers

Tai L.X.T., Longobucco M., Nguyen V.H., Pałuba B., Trippenbach M., Malomed B.A., Astrauskas I., Pugžlys A., Baltuška A., Buczyński R. and Bugár I.

Optics Letters

49(1), 2024, 149-152, 10.1364/OL.500292

We systematically present experimental and theoretical results for the dual-wavelength switching of 1560 nm, 75 fs signal pulses (SPs) driven by 1030 nm, and 270 fs control pulses (CPs) in a dual-core fiber (DCF). We demonstrate a switching contrast of 31.9 dB, corresponding to a propagation distance of 14 mm, achieved by launching temporally synchronized SP-CP pairs into the fast core of the DCF with moderate inter-core asymmetry. Our analysis employs a system of three coupled propagation equations to identify the compensation of the asymmetry by nonlinearity as the physical mechanism behind the efficient switching performance.


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