Design and optimization of a near-elliptic cladding photonic crystal fiber with high extinction ratio stability

Lin Wang; Fengping Yan; Yongjun Fu; Yifang Li; Taorong Gong; Peng Liu; Shuisheng Jian

doi:10.1117/12.743439

21 November 2007 Design and optimization of a near-elliptic cladding photonic crystal fiber with high extinction ratio stability

Lin Wang, Fengping Yan, Yongjun Fu, Yifang Li, Taorong Gong, Peng Liu, Shuisheng Jian

Author Affiliations +

Proceedings Volume 6781, Passive Components and Fiber-based Devices IV; 67811F (2007) https://doi.org/10.1117/12.743439
Event: Asia-Pacific Optical Communications, 2007, Wuhan, China

Abstract

A new near-elliptic cladding Polarization-maintaining photonic crystal fibre (PM-PCF) with four different hole diameters was proposed. Since the refractive index decreases gradually from x-axis to y-axis, less polarization coupling and high extinction ratio were obtained compared to the conventional PM-PCFs. Secondly, every hole diameter of near-elliptic cladding was optimized to get good performance, considering proper mode field diameter of x-axis and y-axis for better coupling to SLD and smaller confinement loss of the new PCF, high birefringence and high extinction ratio, especially the effects of disturbance on extinction ratio stability. According to series of comparison on different hole diameters and correlation between different holes, the optimum parameters of this new PCF of Λ=2.2μm, d₁=2μm, d₂=1.1μm, d₃=1.7μm and d₄=1.2μm were derived. The optimized near-elliptic cladding PCF can obtain both high extinction ratio (>29dB) and good extinction ratio stability (<2dB with ±10% transverse disturbance of d₃) which is useful for practical use.

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Lin Wang, Fengping Yan, Yongjun Fu, Yifang Li, Taorong Gong, Peng Liu, and Shuisheng Jian "Design and optimization of a near-elliptic cladding photonic crystal fiber with high extinction ratio stability", Proc. SPIE 6781, Passive Components and Fiber-based Devices IV, 67811F (21 November 2007); https://doi.org/10.1117/12.743439

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KEYWORDS

Refractive index

Cladding

Birefringence

Photonic crystal fibers

Polarization

Fiber couplers

Lithium

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