The Design of Beam Splitter for Two-Stage Reflective Spectral Beam Splitting Concentrating PV/Thermal System

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.

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High-Precision Polarizing Beam Splitting System Based on Polarizing Beam Splitter

Chinese Journal of Lasers ◽

10.3788/cjl201643.1210001 ◽

2016 ◽

Vol 43 (12) ◽

pp. 1210001

Author(s):

罗敬 Luo Jing ◽

刘东 Liu Dong ◽

徐沛拓 Xu Peituo ◽

白剑 Bai Jian ◽

刘崇 Liu Chong ◽

...

Keyword(s):

High Precision ◽

Beam Splitter ◽

Beam Splitting ◽

Polarizing Beam Splitter ◽

Splitting System

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A novel beam splitter based on graded photonic crystals

Modern Physics Letters B ◽

10.1142/s0217984914501711 ◽

2014 ◽

Vol 28 (23) ◽

pp. 1450171 ◽

Cited By ~ 1

Author(s):

L. H. Wang ◽

X. L. Yang ◽

X. F. Meng ◽

Y. R. Wang ◽

Z. Huang ◽

...

Keyword(s):

Photonic Crystals ◽

Beam Splitter ◽

Square Lattice ◽

Beam Splitting ◽

Splitting Ratio ◽

Application Potential ◽

Wave Methods ◽

The Relationship ◽

Optical Integration ◽

Difference Time

This study proposes a novel beam splitter system based on graded photonic crystals, wherein the GPCs are part of a circular PC. A self-collimating PC structure with a square lattice is added to improve transmissivity. The total transmissivity is increased by extending the defect of the self-collimating PC. This study presents a beam splitter system with low energy loss and the best total transmissivity of almost 90%. Furthermore, the relationship between the beam-splitting ratio and the light position is discovered, and the beam-splitting ratio may be changed discretionarily and expediently. Numerical results are obtained using finite-difference time domain and plane wave methods. The proposed structure has significant application potential in optical integration.

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Development of System for Simultaneous Measurement of Stress and Temperature

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.326-328.163 ◽

2006 ◽

Vol 326-328 ◽

pp. 163-166 ◽

Cited By ~ 2

Author(s):

Eisaku Umezaki ◽

Masahito Abe

Keyword(s):

Time Series ◽

Simultaneous Measurement ◽

Beam Splitter ◽

Visible Range ◽

Ultraviolet Rays ◽

Infrared Range ◽

Curing Process ◽

Beam Splitting ◽

Ultraviolet Curing ◽

Phase Stepping

A system was developed for simultaneously measuring stress and temperature in structures in time series. The stress and temperature were measured using the photoelastic technique in the form of phase stepping and the thermographic technique, respectively. Four phase-stepped photoelastic images were captured simultaneously using beam-splitting optics. A beam splitter was used for transmitting light in the visible range while simultaneously reflecting light in the infrared range. The system was applied to ultraviolet curing resin with a step part illuminated with ultraviolet rays, and the stress and temperature in the curing process were measured. Results showed that the stress and temperature in the curing process can be measured simultaneously in time series using the system. The step part of the resin affected the distribution of the stress and temperature

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Diffraction mechanism of five-port transmission gratings

Optica Applicata ◽

10.37190/oa200408 ◽

2020 ◽

Vol 50 (4) ◽

Author(s):

Chenhao Gao ◽

Bo Wang ◽

Kunhua Wen ◽

Ziming Meng ◽

Qu Wang ◽

...

Keyword(s):

Beam Splitter ◽

Diffraction Order ◽

Normal Incidence ◽

Propagation Mechanism ◽

Beam Splitting ◽

Transmission Grating ◽

Process Tolerance ◽

Wide Range ◽

Rigorous Coupled Wave ◽

Modal Method

This paper designs a five-port transmission grating under normal incidence. Rigorous coupled-wave approach is used to optimize the grating parameters. The energy of the grating is mainly dispersed to the 0th, ±1st and ±2nd orders. The efficiency of each diffraction order under both polarizations is close to 20%. The modal method is used to describe the propagation mechanism of the two polarized lights in the grating, and the diffraction behavior of the grating is analyzed. In addition, the grating has a wide range of incident characteristics and a large process tolerance. Therefore, this five-port beam splitter with a connecting layer will be a good polarization-independent beam splitting device.

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

Photonics ◽

10.3390/photonics9010036 ◽

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.

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Neural network aided diffractive metagratings for efficient beam splitting at terahertz frequencies

Journal of Physics D Applied Physics ◽

10.1088/1361-6463/ac472a ◽

2021 ◽

Author(s):

Runze Li ◽

Jierong Cheng ◽

Xipu Dong ◽

Sheng-jiang Chang

Keyword(s):

Neural Network ◽

Beam Splitter ◽

Optical Response ◽

Orthogonal Polarization ◽

Beam Splitting ◽

Multiple Diffraction ◽

Te Mode ◽

Parallel Arrangement ◽

Terahertz Frequencies ◽

Fully Connected

Abstract The merge of neural network with metasurfaces is a rising subject in photonics design, which offers an abstract bridge between the geometry of the subwavelength element and the optical response. The commonly involved optical response is the transmission or reflection spectrum, while here we focus on metasurfaces with superwavelength elements and predict multiple diffraction spectra in all the possible orders and orthogonal polarization modes given the geometry. This is achieved by parallel arrangement of several fully connected neural networks with shared input and diverse output diffraction spectra. As an application example, the model is used to find a metagrating as a 1:1 beam splitter in TE mode and 1:1:1 beam splitter in TM mode. The design is taken into fabrication and experimentally tested at 0.14 THz with highly consistent results to the prediction.

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