Ultrahigh birefringent photonic crystal fiber with ultralow confinement loss using four airholes in the core

Document Type

Article

Publication Date

8-1-2009

Abstract

A simple photonic crystal fiber (PCF) design with a rectangular array of four airholes in the core region and a traditional circular-airhole cladding is proposed in this work. The modal birefringence is induced by the asymmetry of the rectangular distribution of four airholes and/or the elliptical shape of the holes. The traditional symmetric cladding structure results in good confinement loss performance by limiting the light in the core region. Therefore, the proposed design enables simultaneous realization of high birefringence and low confinement loss. Simulations based on the full-vector finite element method (FEM) with anisotropic (PML) show that ultrahigh single-mode birefringence ∼ 10-2) and ultralow confinement losses (<0.002 dB/km) can be achieved at 1.55 μm wavelength. Dependence study of the birefringence and losses on several key parameters is also provided. Compared to previously studied PCF with asymmetric core or cladding structures, by having just four relatively large airholes in the core, this design could be much easier to be implemented with even better performance. © 2009 IEEE.

Identifier

67651177887 (Scopus)

Publication Title

Journal of Lightwave Technology

External Full Text Location

https://doi.org/10.1109/JLT.2008.2009074

ISSN

07338724

First Page

3175

Last Page

3180

Issue

15

Volume

27

Grant

60877054

Fund Ref

National Natural Science Foundation of China

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