scholarly journals Compact Photonic Crystal Polarization Beam Splitter Based on the Self-Collimation Effect

Photonics ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 198
Author(s):  
Geyu Tang ◽  
Huamao Huang ◽  
Yuqi Liu ◽  
Hong Wang
Keyword(s):  
Optical Communications ◽  
Beam Splitter ◽  
Extinction Ratio ◽  
Polarized Light ◽  
The Self ◽  
Polarization Beam Splitter ◽  
Optical Interconnection ◽  
Beam Splitting ◽  
Beam Splitters ◽  
Polarization Extinction Ratio

We propose a new compact polarization beam splitter based on the self-collimation effect of two-dimensional photonic crystals and photonic bandgap characteristics. The device is composed of a rectangular air holes-based polarization beam splitting structure and circular air holes-based self-collimating structure. By inserting the polarization beam splitting structure into the self-collimating structure, the TE and TM polarized lights are orthogonally separated at their junction. When the number of rows in the hypotenuse of the inserted rectangular holes is 5, the transmittance of TE polarized light at 1550 nm is 95.4% and the corresponding polarization extinction ratio is 23 dB; on the other hand, the transmittance of TM polarized light is 88.5% and the corresponding polarization extinction ratio is 37 dB. For TE and TM polarized lights covering a 100 nm bandwidth, the TE and TM polarization extinction ratios are higher than 18 dB and 30 dB, respectively. Compared with the previous polarization beam splitters, our structure is simple, the size is small, and the extinction ratio is high, which meets the needs of modern optical communications, optical interconnection, and optical integrated systems.

scholarly journals Numerical Investigation of a Short Polarization Beam Splitter Based on Dual-Core Photonic Crystal Fiber with As2S3 Layer

Micromachines ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 706
Author(s):  
Nan Chen ◽  
Xuedian Zhang ◽  
Xinglian Lu ◽  
Zheng Zhang ◽  
Zhangjian Mu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Beam Splitter ◽  
Extinction Ratio ◽  
Polarized Light ◽  
Polarization Beam Splitter ◽  
Optical Fields ◽  
Crystal Fiber ◽  
Dual Core ◽  
Better Than

A polarization beam splitter is an important component of modern optical system, especially a splitter that combines the structural flexibility of photonic crystal fiber and the optical modulation of functional material. Thus, this paper presents a compact dual-core photonic crystal fiber polarization beam splitter based on thin layer As2S3. The mature finite element method was utilized to simulate the performance of the proposed splitter. Numerical simulation results indicated that at 1.55 μm, when the fiber device length was 1.0 mm, the x- and y-polarized lights could be split out, the extinction ratio could reach −83.6 dB, of which the bandwidth for extinction ratio better than −20 dB was 280 nm. It also had a low insertion loss of 0.18 dB for the x-polarized light. In addition, it can be completely fabricated using existing processes. The proposed compact polarization beam splitter is a promising candidate that can be used in various optical fields.

scholarly journals Ultra-Short Dual-Core Photonic Crystal Fiber Polarization Beam Splitter with Round Lattice and As2S3-Filled Center Air Hole

Photonics ◽  
2022 ◽  
Vol 9 (1) ◽  
pp. 36
Author(s):  
Junbo Lou ◽  
Yonghui Yang ◽  
Xinhe Zhang ◽  
Qiang Qu ◽  
Shuguang Li
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Beam Splitter ◽  
Extinction Ratio ◽  
Polarization Beam Splitter ◽  
Splitting Function ◽  
Beam Splitting ◽  
Crystal Fiber ◽  
High Extinction Ratio ◽  
Air Hole

A circular ultra-short As2S3 filled double-core photonic crystal fiber polarization beam splitter is proposed. The finite element method is used to study the performance of the designed photonic crystal fiber polarization beam splitter. By filling high refractive index As2S3 into the central air hole, the coupling performance of the double-core PCF is improved. By optimizing geometric parameters, the splitting length of the circular beam splitter can be as short as 72.43 μm, and the extinction ratio can reach −151.42 dB. The high extinction ratio makes the circular polarization beam splitter have a good beam splitting function. The designed circular double-core photonic crystal fiber has the same cladding pore diameter, which is easier to prepare than other photonic crystal fibers with complex pore structure. Due to the advantages of high extinction ratio, extremely short beam splitting function and simple structure, the designed polarization beam splitter will be widely used in all-optical networks and optical device preparation.

Ultra-high extinction-ratio polarization beam splitter with extreme skin depth waveguide

2021 ◽  
Author(s):  
Syed Ziauddin Ahmed ◽  
Ishtiaque Ahmed ◽  
Md Borhan Mia ◽  
Nafiz Jaidye ◽  
Sangsik Kim
Keyword(s):  
Beam Splitter ◽  
Extinction Ratio ◽  
Skin Depth ◽  
Polarization Beam Splitter ◽  
High Extinction Ratio

Broadband silicon polarization beam splitter with a high extinction ratio using a triple-bent-waveguide directional coupler

2017 ◽  
Vol 42 (21) ◽  
pp. 4450 ◽  
Author(s):  
Jun Rong Ong ◽  
Thomas Y. L. Ang ◽  
Ezgi Sahin ◽  
Bryan Pawlina ◽  
G. F. R. Chen ◽  
...  
Keyword(s):  
Directional Coupler ◽  
Beam Splitter ◽  
Extinction Ratio ◽  
Polarization Beam Splitter ◽  
High Extinction Ratio

scholarly journals High-extinction-ratio silicon polarization beam splitter with tolerance to waveguide width and coupling length variations

2016 ◽  
Vol 24 (6) ◽  
pp. 6586 ◽  
Author(s):  
Yong Zhang ◽  
Yu He ◽  
Jiayang Wu ◽  
Xinhong Jiang ◽  
Ruili Liu ◽  
...  
Keyword(s):  
Beam Splitter ◽  
Extinction Ratio ◽  
Polarization Beam Splitter ◽  
Coupling Length ◽  
High Extinction Ratio ◽  
Waveguide Width

Compact Polarization Beam Splitter Based on Surface Plasmon Polariton Silicon Waveguide

2014 ◽  
Vol 609-610 ◽  
pp. 1233-1238 ◽  
Author(s):  
Jun Bo Yang ◽  
Zheng Zhang Shao ◽  
Su Zhi Xu ◽  
Jia Xu ◽  
Zhou Kuo
Keyword(s):  
Surface Plasmon ◽  
Large Scale ◽  
Beam Splitter ◽  
Coupling Efficiency ◽  
Polarized Light ◽  
Polarization Beam Splitter ◽  
Photonic Integration ◽  
Silicon Waveguide ◽  
Evanescent Coupling ◽  
Theoretical Predictions

A compact polarization beam splitter (PBS) based on a silicon waveguide-silver nanoribbon-silicon waveguide is proposed and demonstrated numerically by utilizing the evanescent coupling between a strip-nanowire and a nanoslot waveguide. Two-dimensional (2-D) FDTD simulations were performed to elucidate the properties of surface plasmon polaritons (SPPs) in this device made from silicon-metal-silicon, and were found to agree well with the theoretical predictions. TE and TM polarized light are respectively separated into two different output ports of Y-shaped silicon waveguide in which the coupling efficiency is 62% and 45% for 1.55μm wavelength, respectively. The proposed PBS structure could be utilized to develop ultracompact optical polarization modulating device for large-scale photonic integration and optical information processing.

High Extinction Ratio Polarization Beam Splitter Realized by Separately Coupling

2020 ◽  
Vol 32 (18) ◽  
pp. 1183-1186
Author(s):  
Chaoqun Niu ◽  
Zhi Liu ◽  
Xiuli Li ◽  
Xiangquan Liu ◽  
Fengshuo Wan ◽  
...  
Keyword(s):  
Beam Splitter ◽  
Extinction Ratio ◽  
Polarization Beam Splitter ◽  
High Extinction Ratio

Multi-functional gallium arsenide photonic crystal polarization splitter with a gold core

2021 ◽  
pp. 2150229
Author(s):  
Chao Liu ◽  
Sinuo An ◽  
Jingwei Lv ◽  
Lin Yang ◽  
Famei Wang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Fiber Length ◽  
Beam Splitter ◽  
Polarized Light ◽  
Short Fiber ◽  
Polarization Beam Splitter ◽  
Gold Core ◽  
Vector Finite Element Method ◽  
Circular Holes ◽  
Vector Finite Element

A multi-functional dual-core photonic crystal fiber (PCF) polarization beam splitter with a central oval hole filled with gold is designed and described. The first layer on the circular holes around the core is filled with the nematic liquid crystal (NLC) to enhance birefringence. The full-vector finite element method is employed to study the characteristics of the polarization beam splitter and derive the optimal parameters. When the fiber length is 14.55 [Formula: see text]m, the polarized light in the [Formula: see text]- and [Formula: see text]-directions can be separated at a wavelength of 1.31 [Formula: see text]m and the bandwidths are 257 and 238 nm, respectively, for extinction ratios bigger than 10 dB. When the fiber length is 10.86 [Formula: see text]m, the polarized light in the [Formula: see text]- and [Formula: see text]-directions can be separated at a wavelength of 1.55 [Formula: see text]m and the bandwidths are 239 and 174 nm, respectively for extinction ratios larger than 10 dB. The multifunctional polarization beam splitter with an ultra-short fiber length and broad bandwidth improves the sensing performance in comparison with single-function devices and our results provide insights into the design of beam splitters with multiple functions.

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