Polarizing photonic crystal fiber with low index inclusion in the core

We demonstrate that adding a boron-doped inclusion in the core of a polarizing photonic crystal fiber significantly increases its polarization bandwidth. We present the characteristics of two fabricated fibers, including spectral dependence of loss in both polarization modes and polarization-dependent loss in straight as well as bent fibers. Our experiments prove that bending significantly increases the polarization band of the boron-doped fibers on the short wavelength edge. For a properly adjusted bending radius a single polarization guidance can be obtained in a wide spectral range. Moreover, we present the results of loss simulations carried out for the actual geometry of the fabricated fibers, which are in agreement with the measurement results.

Publication year:2010

Keywords:POLARIZATION