Abstract
The design of a residual dispersion compensating fiber in an equiangular
spiral photonic crystal fiber (ES-PCF) structure is presented in the wavelength
range 1350–1650 nm. A step-by-step design optimization is demonstrated
and a maximum optimized value of average dispersion -393 ps/nm km with a flattened dispersion
profile with a very high birefringence is reported. It has been found that
for the ES-PCF, a very high birefringence of 0.0278 at the wavelength 1550
nm can be obtained by employing an elliptical air hole as defect in the core
region. An efficient full-vectorial finite-element method with vector edge
element is employed in this study. The proposed ES-PCF can be an excellent
candidate to be used in a wavelength-division-multiplexing optical fiber transmission
system for residual chromatic dispersion compensation as well as maintaining
single polarization.
© 2012 IEEE
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