Actively coupled optical waveguides
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2014
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Physical Review A - Atomic, Molecular, and Optical Physics
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Abstract
We consider light propagation through a pair of nonlinear optical waveguides with absorption, placed in a medium with power gain. The active medium boosts the in-phase component of the overlapping evanescent fields of the guides, while the nonlinearity of the guides couples it to the damped out-of-phase component creating a feedback loop. As a result, the structure exhibits stable stationary and oscillatory regimes in a wide range of gain-loss ratios. We show that the pair of actively coupled (AC) waveguides can act as a stationary or integrate-and-fire comparator sensitive to tiny differences in their input powers.
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Alexeeva, N.V., Barashenkov, I.V., Rayanov, K. & Flach, S. 2014. Actively coupled optical waveguides. Physical Review A - Atomic, Molecular, and Optical Physics. 89(1):174 - 177. http://hdl.handle.net/11427/34615