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. 2019 May 26;12(10):1709.
doi: 10.3390/ma12101709.

An Ultrashort Wavelength Multi/Demultiplexer via Rectangular Liquid-Infiltrated Dual-Core Polymer Optical Fiber

Qiang Xu  1   2 , Kang Li  3   4 , Nigel Copner  5   6 , Shebao Lin  7
Affiliations

An Ultrashort Wavelength Multi/Demultiplexer via Rectangular Liquid-Infiltrated Dual-Core Polymer Optical Fiber

Qiang Xu et al. Materials (Basel). .

Abstract

We propose a rectangular liquid-infiltrated dual-core polymer optical fiber (POF) for short-range communication systems by the beam propagation method (BPM). The POF multi/demultiplexer (MUX/DEMUX) at the wavelengths of 0.52/0.65-μm, 0.57/0.65-μm, and 0.52/0.57-μm are devised. The simulation results demonstrate that the ultrashort length of three ultrashort POF couplers are 183.6 μm, 288 μm, and 799.5 μm. Compared with the conventional optical fiber couplers, these results could have significant applications in the miniaturization of optical devices for visible light communication.

Keywords: birefringence; couplers; coupling length; polymer optical fiber.

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Conflict of interest statement

The authors declare no conflicts of interest.

Figures

Figure 1
Figure 1
Cross-section of the proposed polymer optical fiber. The enlarged view of the core region is shown in the illustration.
Figure 2
Figure 2
Period Λ dependence of the coupling lengths for different air-filling ratio d/Λ.
Figure 3
Figure 3
Period Λ dependence of the birefringence for different air-filling ratio d/Λ.
Figure 4
Figure 4
Period Λ dependence of the coupling length for different wavelength.
Figure 5
Figure 5
d1 dependence of the different coupling ratios, (a) when d/Λ = 0.9, (b) when d/Λ = 1.0, and (c) when d/Λ = 1.1.
Figure 5
Figure 5
d1 dependence of the different coupling ratios, (a) when d/Λ = 0.9, (b) when d/Λ = 1.0, and (c) when d/Λ = 1.1.
Figure 6
Figure 6
Birefringence as a function of filling material.
Figure 7
Figure 7
Confinement loss as a function of filling material.
Figure 8
Figure 8
The propagation distance dependence of the normalized power for the three couplers, (a) at the wavelength of 0.52/0.65-μm, (b) at the wavelength of 0.57/0.65-μm, and (c) at the wavelength of 0.52/0.57-μm.
Figure 9
Figure 9
(a) Even-mode of x-direction, (b) odd-mode of x-direction, (c) even-mode of y-direction, (d) odd-mode of y-direction for coupler.
See this image and copyright information in PMC

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