Abstract
A broadband single-polarization single-mode optical fiber is proposed. One
of the polarized states of the highly birefringent square-lattice photonic
crystal fiber is eliminated by index-matched coupling with the modes of two
cladding defects. Numerical results show that single-polarization operation
with the transmission losses of one polarized state larger than 2 dB/m and
the losses of another state lower than 2 dB/km can be realized in a spectral
region ranged from 1477 to 1776 nm. In addition, by modifying the air holes
surrounding the cladding defects, the losses of the unwanted polarized state
can be enhanced to be larger than 10 dB/m, with the losses of the
transmission state lower than 0.1 dB/m in a 560-nm-broad spectral
region.
© 2010 IEEE
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