Abstract
By using the supercell lattice method, we investigate the influence of the squeezing lattice on the
birefringence characteristics of photonic crystal fibers (PCFs). We first define the concept of squeezing ratio and
then present a model, with which several types of PCFs are simulated. Simulation results show that the squeezing of
PCFs' lattice with the uniform air holes in the cladding can break the multifold symmetry of PCFs and make PCFs
highly birefringent. Furthermore, it is reported for the first time to our knowledge that the polarity of PCFs'
birefringence can change several times as the air-hole diameter changes.
© 2007 IEEE
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