Abstract
We report simulation and experiment results of modal behaviors of photonic
crystal (PhC) tapers on InP-based materials designed to improve coupling
efficiency of the PhC waveguide mode into a cleaved-facet single-mode fiber.
The modal distributions of transmitted power are simulated by
two-dimensional finite difference time domain (2D-FDTD) calculation and the
measured far-field patterns are in agreement with these calculations. The
34.4 $\mu$m-long PhC taper with Gaussian curve geometry is demonstrated to
have an enhancement of coupling efficiency by a factor of four compared to
the direct coupling from a W3 PhC defect waveguide.
© 2009 IEEE
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