Author Affiliations
Abstract
1 Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education and Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices, School of Physics and Electronics, Hunan University, Changsha 410082, China
2 Shenzhen Lubon Technology Co., Ltd., Shenzhen 518000, China
More durable (with high impact force), lighter, and more compact flexible azo dye micropolarizers are attractive candidates for low-cost, simple polarization imaging systems. The liquid crystal polymer (LCP), as an emerging material developed by photo-alignment technology, is a potential material for organizing the long-range ordered structure of azo dyes. However, little research has been done on LCP aligned azo dyes. This paper points out and solves a key problem that restricts the fabrication of high-precision arrays in guest (azo dye)-host (LCP) systems: the doping of dyes leads to disorder of the LCP during curing. After solving the problem, the relationship between the thickness of the LCP and the extinction ratio of the polarizing film was investigated, which effectively improved the extinction ratio. Alignment of azo dye molecules in the range of 2 µm (0°–180°) and arrays of micropolarizers (0°, 45°, 90°, -45°) with 8 µm × 8 µm pixel pitch was achieved by laser direct writing technology. The bending cycle test demonstrates the mechanical stability of the ultrathin flexible polarizer. The flexible patterned polarizer with robust chemical and mechanical stabilities provides a flexible way to capture the polarization of the light and highly integrated advanced flexible optoelectronic devices.
micropolarizer polarimetric imaging polarimetry azo dye polarization-sensitive devices 
Chinese Optics Letters
2023, 21(3): 031301
Author Affiliations
Abstract
Key Laboratory of All Optical Network and Advanced Telecommunication Network, Ministry of Education, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China
We propose and analyze a silicon hybrid plasmonic polarization splitter-rotator with an ultra-short footprint using an asymmetric bent directional coupler on a silicon-on-insulator platform. Benefitting from the large birefringence induced by the bent structure and plasmonic effect, the cross-polarization coupling length is only 5.21 μm. The transverse magnetic to transverse electric polarization conversion efficiency is over 99.9%, with an extinction ratio of 20.6 dB (32.5 dB) for the transverse magnetic (transverse electric) mode at 1.55 μm. Furthermore, the polarization conversion efficiency is higher than 90% while maintaining cross talk below ?19 dB within the bandwidth of 80 nm.
polarization sensitive devices surface plasmons integrated optics devices 
Chinese Optics Letters
2020, 18(4): 041301
作者单位
摘要
1 College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
2 School of Science, Wuhan University of Technology, Wuhan 430070, China
integrated optics subwavelength gratings polarization-sensitive devices rigorous coupled wave analysis (RCWA) 
Frontiers of Optoelectronics
2009, 2(2): 187
Author Affiliations
Abstract
1 Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
2 Shanghai Sieyuan Electric Co., Ltd., Shanghai 201108
A new technology of lightning location is described, which is based on detecting the state of polarization (SOP) fluctuation of the laser light in the optic ground wire (OPGW). Compared with the conventional lightning location method, the new method is more accurate, more stable, and cheaper. Theories of Stokes parameters and Poincare sphere are introduced to analyze the SOP at the lightning strike point. It can be concluded that although the initial points of SOP on the Poincare sphere are random, the SOP fluctuation generated by lightning strike can still be accurately identified by detecting the velocity of polarization motion. A new algorithm to quantify the velocity is also introduced.
测量 光纤复合架空地线 邦加球 偏振态 斯托克斯参量 230.5440 Polarization-sensitive devices 060.0060 Fiber optics and optical communications 060.2420 Fibers, polarization-maintaining 060.2330 Fiber optics communications 
Chinese Optics Letters
2006, 4(12): 712
Author Affiliations
Abstract
Department of Electronic Engineering, Tsinghua University, Beijing 100084
A dynamic first-order polarization mode dispersion (PMD) compensator based on garnet and yttrium vanadate crystal has been proposed and implemented. Consisting of a differential group delay (DGD) generator and a Faraday rotator (FR), this PMD compensator has only two degrees of freedom. Feedback control and compensation algorithm are both very simple. Experimental results reveal the compensator behaviors to be excellent for PMD compensation in 40-Gb/s optical time domain multiplexing (OTDM) system.
060.2330 Fiber optics communications 230.5440 Polarization-sensitive devices 
Chinese Optics Letters
2006, 4(4): 04202
Author Affiliations
Abstract
1 R&
2 Center of Optoelectonics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
A new fabrication technology for three-dimensionally buried silica on silicon optical waveguide based on deep etching and thermal oxidation is presented. Using this method, a silicon layer is left at the side of waveguide. The stress distribution and effective refractive index are calculated by using finite element method and finite different beam propagation method, respectively. The results indicate that the stress of silica on silicon optical waveguide fabricated by this method can be matched in parallel and vertical directions and stress birefringence can be effectively reduced due to the side-silicon layer.
230.7390 waveguides planar 230.5440 polarization-sensitive devices 130.2790 guided waves 
Chinese Optics Letters
2004, 2(8): 08456

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