A Tunable Polarization Beam Splitter Based on Magnetic Fluids-Filled Dual-Core Photonic Crystal Fiber

Jianshuai Wang; Li Pei; Sijun Weng; Liangying Wu; Lin Huang; Tigang Ning; Jing Li

doi:10.1109/JPHOT.2017.2656248

IEEE Photonics Journal (Jan 2017)

A Tunable Polarization Beam Splitter Based on Magnetic Fluids-Filled Dual-Core Photonic Crystal Fiber

Jianshuai Wang,
Li Pei,
Sijun Weng,
Liangying Wu,
Lin Huang,
Tigang Ning,
Jing Li

Affiliations

Jianshuai Wang: Key Laboratory of All Optical Network and Advanced Telecommunication Network, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing, China
Li Pei: Key Laboratory of All Optical Network and Advanced Telecommunication Network, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing, China
Sijun Weng: Key Laboratory of All Optical Network and Advanced Telecommunication Network, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing, China
Liangying Wu: Key Laboratory of All Optical Network and Advanced Telecommunication Network, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing, China
Lin Huang: Key Laboratory of All Optical Network and Advanced Telecommunication Network, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing, China
Tigang Ning: Key Laboratory of All Optical Network and Advanced Telecommunication Network, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing, China
Jing Li: Key Laboratory of All Optical Network and Advanced Telecommunication Network, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing, China

DOI: https://doi.org/10.1109/JPHOT.2017.2656248
Journal volume & issue: Vol. 9, no. 1
pp. 1 – 10

Abstract

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A tunable polarization beam splitter (PBS) is proposed based on a dual-core photonic crystal fiber (DCPCF). The DCPCF is filled with magnetic fluids in the air holes, whose refractive index varies with the magnetic field strength. The two polarized modes are separated into the two cores at the output ports in a magnetic-free condition. When magnetic field is applied, the output intensities of the two polarized modes would fluctuate. The polarized modes can be ported out with arbitrary proportion by adjusting the magnetic field intensity. Moreover, the polarized mode would be completely converted at some magnetic field strength. The properties of the DCPCF are investigated by the finite element method (FEM), including mode-conversion magnetic field strength, extinction ratio, fabrication tolerance of the PBS, and the performance of PBS at various temperatures. The numerical results show that at 1550-nm wavelength, the length of the tunable PBS is 8.13 mm. The polarized mode converts at a magnetic intensity of 25 mT with a high extinction ratio greater than -100 dB. In addition, the tunable PBS sustains a fabrication tolerance of at least 0.5% and works well at temperatures in the range of 0-55 °C by adjusting the magnetic field strength.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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