Broadband Polarization Beam Splitter Based on Silicon Dual-Core Photonic Crystal Fiber with Gold Layers Operating in Mid-Infrared Band

Chen, Nan; Ding, Xin; Wang, Luyao; Xiao, Yunpeng; Guo, Wenhui; Huang, Yanming; Guo, Luhao; Liu, Chenxun; Xu, Yiming

doi:10.1007/s11468-023-02117-z

Cited by 6 publications

(3 citation statements)

References 62 publications

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“…When selecting plasma materials like gold, silver, copper, and aluminum, it is clear that gold is the preferred choice due to its superior stability and sustainability compared to the others and can produce efficient SPR effect. The dielectric constant, known as the Drude-Lorentz (DL) model [34], for the gold thin layer can be represented as:…”

Section: Structure and Theorymentioning

confidence: 99%

“…where, ε m represents the dielectric constant of the gold; ε ∞ represents the dielectric constant at high frequency; ω and ω D represent the angular frequency and plasma frequency; γ D represents the damping coefficient; Δε represents the weighting factor; Ω L and Г L represent oscillation frequency and spectral width. These detailed values can be seen from literature [34].…”

Section: Structure and Theorymentioning

confidence: 99%

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Numerical analysis of an all-fiber plasmonic polarization filter using dual elliptical gold thin layers deposited photonic crystal fiber

Xu,

Liu,

Chen

et al. 2024

Phys. Scr.

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In order to solve the problems of high performance and small size incompatibility, as well as limited bandwidth, of traditional polarization filters in optical communication systems, this work presents an all-fiber polarization filter using dual elliptical gold layer deposited photonic crystal fiber by the finite element tool. The gold layers are plated on the inside of the two elliptical holes to create surface plasmon resonance effect, which cause the signal intensity in x-polarized direction to be much greater than that in y-polarized direction. The simulation results illustrate that when hole-to-hole pitch Ʌ is 2.0 μm, cladding hole diameter d1 is 2.0 μm, two inner-holes’ diameter d2 is 0.3 μm, spacing between two inner-holes ds is 0.755 μm, the major axis length of elliptical holes a is 2.0 μm, the minor axis length of elliptical holes b is 0.97 μm, the gold thin layer t is 100 nm, the proposed PCF filter exhibits good filtering performance at the communication wavelength of 1.55 μm, where the confinement loss in x- and y-polarized direction are 303.91 dB/cm and 0.06 dB/cm, respectively. The crosstalk and operating bandwidth improve with the increment of device’s length, the 800 μm-long PCF filter possesses the maximum crosstalk of -211.14 dB and the bandwidth of 600 nm. Finally, the experimental scheme is also discussed. We believe that this photonic filter can play a significant role in optical communication, optical sensing, spectral analysis, and other related fields.

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Section: Structure and Theorymentioning

confidence: 99%

Section: Structure and Theorymentioning

confidence: 99%

Numerical analysis of an all-fiber plasmonic polarization filter using dual elliptical gold thin layers deposited photonic crystal fiber

Xu,

Liu,

Chen

et al. 2024

Phys. Scr.

Self Cite

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show abstract

“…So far, there have been numerous reports on PBS based on PCF. There are primarily two types of PBS based on PCF, including dual-core PCF (DC-PCF) PBS [5][6][7] and triple-core PCF (TC-PCF) PBS [8][9][10]. However, due to the more challenging manufacturing process of TC-PCF, some research efforts have focused on DC-PCF PBS.…”

Section: Introductionmentioning

confidence: 99%

Dual-Core Photonic Crystal Fiber Polarization Beam Splitter Based on a Nematic Liquid Crystal with an Ultra-Short Length and Ultra-Wide Bandwidth

Ji,

Du,

Dai

et al. 2024

Electronics

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This paper presents a novel pentagonal structure dual-core photonic crystal fiber polarizing beam splitter (PS-DC-PCF PBS) filled with a nematic liquid crystal (NLC) in the central hole. Unlike previous designs with symmetric arrangements, the upper and lower halves of the structure have different air hole arrangements. The upper half consists of air holes arranged in a regular quadrilateral pattern, while the lower half features a regular hexagonal arrangement of air holes. By filling the central hole with birefringent liquid crystal, the birefringence of the structure is enhanced, reducing the coupling lengths along the x polarization and y polarization directions. The polarization properties, coupling characteristics, and the influence of different structural parameters on the extinction ratio of the polarizing beam splitter are analyzed using the full-vector finite element method. Simulation results demonstrate that the designed PS-DC-PCF PBS achieves a maximum extinction ratio (ER) of 72.94 dB with a splitting length of only 61.9 μm and a wide operating bandwidth of 423 nm (1.324–1.747 μm), covering most of the O, E, S, C, L, and U communication bands. It exhibits not only ultra-short splitting lengths and ultra-wide splitting bandwidth but also good manufacturing tolerances and anti-interference capabilities. The designed PS-DC-PCF PBS could provide crucial device support for future all-optical communication systems and has potential applications in fiber optic communication or fiber laser systems.

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High-performance dual-core photonic crystal fiber polarization beam splitter based on gold-titania composite film coating

Liu,

Wang,

Liu

et al. 2024

Phys. Scr.

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A novel gold-titania composite film-coated dual-core photonic crystal fiber polarization beam splitter (GT-DC-PCF PBS) is proposed for the first time. The titania film and gold film are sequentially deposited on the inner wall of the central air hole to improve the polarization splitting performance and enhance the adsorption strength between the gold film and the optical fiber. Based on the mode coupling theory and surface plasmon resonance effect, the transmission characteristics of x-polarization (X-pol) and y-polarization (Y-pol) odd and even modes in the near-infrared band are analyzed by finite element method. Meanwhile, the variation of coupling length and coupling length ratio for X-pol and Y-pol light under different PCF structural parameters at the wavelength of 1550 nm are also studied to optimize the performance of PBS. The results show that at the 1550 nm communication window, the extinction ratio of the PBS is up to -175.82 dB for the polarization splitting length of 2.76 mm, with an operating bandwidth of 179 nm and a maximum insertion loss of 0.23 dB. This paper aims to propose a novel design method to improve the performance of DC-PCF PBS, which has profound guiding significance for the development of high-performance PBS.

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Broadband Polarization Beam Splitter Based on Silicon Dual-Core Photonic Crystal Fiber with Gold Layers Operating in Mid-Infrared Band

Cited by 6 publications

References 62 publications

Numerical analysis of an all-fiber plasmonic polarization filter using dual elliptical gold thin layers deposited photonic crystal fiber

Numerical analysis of an all-fiber plasmonic polarization filter using dual elliptical gold thin layers deposited photonic crystal fiber

Dual-Core Photonic Crystal Fiber Polarization Beam Splitter Based on a Nematic Liquid Crystal with an Ultra-Short Length and Ultra-Wide Bandwidth

High-performance dual-core photonic crystal fiber polarization beam splitter based on gold-titania composite film coating

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