Abstract
We theoretically address the thermo-optical response of multicore photonic
crystal fiber (PCF) couplers infiltrated with nematic liquid crystals (LCs).
The proposed PCF coupler consists of two identical cores separated by a third
one which acts as a liquid crystal resonator. With an appropriate choice of
the design parameters associated with the liquid crystal core, phase matching
at a single wavelength can be achieved, thus enabling thermo-tunable narrow-band
resonant directional coupling between the input and the output cores. The
verification of the proposed coupler design is ensured through an accurate
PCF analysis based on finite element and beam propagation methods. The enhanced
thermo-optical properties of LC-based PCF couplers are highly attractive for
photo-thermal sensing applications.
© 2008 IEEE
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