A Novel Gold Film-coated V-shape Dual-core Photonic Crystal Fiber Polarization Beam Splitter Covering the E+S+C+L+U Band

Qu, Yuwei, Yuan, Jinhui, Qiu, Shi Qiu, Zhou, Xian, Li, Feng, Yan, Binbin, Wu, Qiang, Wang, Kuiru, Sang, Xinzhu, Long, Keping and Yu, Chongxiu (2021) A Novel Gold Film-coated V-shape Dual-core Photonic Crystal Fiber Polarization Beam Splitter Covering the E+S+C+L+U Band. Sensors, 21 (2496). ISSN 1424-3210

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Official URL: https://doi.org/10.3390/s21020496

Abstract

In this paper, a novel gold film-coated V-shape dual-core photonic crystal fiber (V-DC-PCF) polarization beam splitter (PBS) based on surface plasmon resonance effect is proposed. The coupling lengths of the X-polarization (X-pol) and Y polarization (Y-pol) and the corresponding coupling length ratio of the proposed V-DC-PCF PBS without gold film and with gold film are compared. The fiber structure parameters and thickness of the gold film are optimized through investigating their effects on the coupling lengths and coupling length ratio. As the propagation length increases, the normalized output powers of the X-pol and Y-pol of the proposed V-DC-PCF PBS at the three wavelengths 1.610, 1.631, and 1.650 µm are demonstrated. The relationships between the extinction ratio (ER), insertion loss (IL) and wavelength for the three splitting lengths (SLs) 188, 185, and 182 µm are investigated. Finally, it is demonstrated that for the proposed V-DC-PCF PBS, the optimal SL is 188 µm, the ILs of the X-pol and Y pol are less than 0.22 dB, and the splitting bandwidth (SB) can cover the E + S + C + L + U band. The proposed V-DC-PCF PBS has the ultra-short SL, ultra-wide SB, and ultra-low IL, so it is expected to have important applications in the laser, sensing, and dense wavelength division multiplexing systems.

Item Type: Article
Uncontrolled Keywords: V-shape dual-core photonic crystal fiber, polarization beam splitter, surface plasmon resonance effect; extinction ratio, insertion loss
Subjects: F200 Materials Science
F300 Physics
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: John Coen
Date Deposited: 08 Jan 2021 10:20
Last Modified: 25 Feb 2021 17:30
URI: http://nrl.northumbria.ac.uk/id/eprint/45166

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