Highly birefringent ZBLAN photonic quasi-crystal fiber with four circular air holes in the core
2014
Abstract A highly birefringent ZBLAN photonic quasi-crystal fiber with a rectangular array of four relatively small circular air holes in the core region is proposed. Through optimizing fiber structure parameters using a full-vector finite-element method combined with perfectly matched layers boundary condition, its birefringence is up to 2.88 × 10 −2 and the confinement losses of both polarized modes are less than 4.95 × 10 −4 dB/m at 2 μm. To our knowledge, this is the first simulation study showing that a birefringence can be achieved with the order of 10 −2 by all-circular-hole PQFs around 2 μm.
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