A Novel Gold Film-Coated V-Shape Dual-Core Photonic Crystal Fiber Polarization Beam Splitter Covering the E + S + C + L + U Band

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.

Simple structure dual-core photonic crystal fiber polarization beam splitter covering the O + E + S + C + L + U band based on the surface plasmon resonance effect

“…The maximum value of the CLR between wavelengths 1.434 and 1.609 μm is only 2.018, so the value of the CLR can be approximately equal to 2. According to the previous work [36], when the working wavelength is located between wavelengths 1.434 and 1.609 μm where CLR = 2, it may be beneficial to obtain a wider SB. Moreover, the CLX and CLY increase first and then decrease between wavelengths 1.434 and 1.609 μm, so the CLX and CLY will have two approximately equal values near wavelengths 1.434 and 1.609 μm, respectively.…”

Design of a photonic crystal fiber polarization beam splitter with simple structure and ultra-wide bandwidth

“…According to the working principle, when the mixed polarized light enters the core A or core B, it will be completely split into the X-pol light and Y -pol light at a specific splitting length. [31] In the following, the normalized output power (NOP) is used to describe the transfer of the light energy between the core A and the core B at different propagation distances: [32] P X,Y out,A = P in cos 2 π 2…”

Structural Analysis of Nano Core PCF With Fused Cladding for Supercontinuum Generation in 6G Networks

“…The micro‐structured fiber commonly known as Photonic Crystal Fiber (PCF) comprises numerous air‐holes distributed periodically over the longitudinal axis has attracted attention due to its extraordinary features such as high nonlinear properties, optimizable dispersion, well‐behaved mode area, and endlessly single‐mode guidance (M. Abdullah‐Al‐Shafi & Sen, 2021; M. S. Hossain, et al., 2021; A. K. Vyas, 2021). PCF is broadly classified into two types based on the mechanism of the guidance of light propagated as effective‐index guidance and photonic bandgap PCF (Y. Guo, et al., 2021; M. A. Islam, et al., 2021; Y. L. She, et al., 2021; Y. Qu, et al., 2021).…”