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IEEE 10th Asia-Pacific Conference on Antennas and Propagation (APCAP)

作者： Li, Sen Tian, Yijia Zhuang, Lu Ouyang, Jun Univ Elect Sci & Technol China Chengdu 611730 Peoples R China

ISBN: (纸本)9781665489546

In this paper, a ring chipless tag insensitive to the incident wave angle is proposed. The tag adopts the patch type frequency selective surface structure, the surface of the dielectric substrate is composed of three groups of rings. By designing the coding frequency band as the staggered arcs, designing the radius and radian of them, in addition extracting and processing the dual polarization Radar Cross Section(RCS), the frequency domain and polarization coding are realized. Changing the incident angle of the plane wave to the tag, due to the good symmetry of the tag, the shift of the RCS absorption extreme frequency point of the tag is small, which improves the feasibility of tag coding.

关键词： chipless tag angle insensitive frequency coding polarization coding

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Analysis of polarization coding for subcarrier multiplexing quantum key distribution

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QUANTUM INFORMATION PROCESSING 2019年第5期18卷 130-130页

作者： Xiao, Hailin Ouyang, Shan Chronopoulos, Anthony Theodore Hubei Univ Hubei Engn Technol Res Ctr Educ Informationizat Wuhan 430062 Hubei Peoples R China Guilin Univ Elect Technol Sch Informat & Commun Guilin 541004 Peoples R China Univ Texas San Antonio Dept Comp Sci San Antonio TX 78249 USA Univ Patras Dept Comp Engn & Informat Rion 26500 Greece

In this paper, a polarization-coding scheme for subcarrier multiplexing quantum key distribution (SCM-QKD) is proposed, in which the overall QKD can be substantially increased by relying on parallel sideband channels. The polarization state of each sideband can be randomly and independently synthesized by controlling the phase difference of subcarriers. We derive the mathematical formulas of quantum bit error rate (QBER). Both the theoretical analysis and the numerical results show that an efficient implementation of BB84 protocol is feasible. By the proposed polarization coding in a parallel QKD system, without relying on dispersion compensation, a 6% performance gain in terms of correct bit rate over the conventional BB84 protocol (i.e., without polarization coding) is obtained. More importantly, the proposed polarization-coding-aided SCM-QKD can help achieve a long-distance QKD with a low QBER.

关键词： Microwave photonics polarization coding Subcarrier multiplexing Quantum key distribution BB84 protocol

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SO(3) matrix transformation for rapid polarization search and coding in a three-plate polarizer

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OPTICA APPLICATA 2015年第1期45卷 101-112页

作者： Huang, Chunhui Wang, Xuejin Fuzhou Univ Coll Phys & Informat Engn Fuzhou 350108 Peoples R China

A SO(3) transformer of a three-plate polarizer is adopted to rapidly achieve the transformation of the polarized state. The polarization coding based on Stokes components S-2 and S-3 is analyzed and demonstrated. Tabu search algorithm is used to accelerate the transformation of the polarized state by utilizing Mueller matrix roots decomposition to decompose the SO(3) matrix, and substituting first order Taylor series approximations for the trigonometric functions in the SO(3) matrix. The results show that bias voltage is less than 120 V in the coding zone. The search speed of our algorithm is faster than the one without first order Taylor series approximations by 4 times.

关键词： SO(3) transformer tabu search polarization coding

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Performance verification of sun blocking filter for satellite based laser communication terminals 32

Performance verification of sun blocking filter for satellit...

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Conference on Infrared Imaging Systems - Design, Analysis, Modeling, and Testing XXXII

作者： Rahman, S. K. Shaid-Ur Bruynooghe, Stephane Sundermann, Michael Huebner, Martin HENSOLDT Optron GmbH Carl Zeiss Str 22 D-73446 Oberkochen Germany Carl Zeiss Jena GmbH Coating Technol Carl Zeiss Str 22 D-73446 Oberkochen Germany

ISBN: (数字)9781510643185

ISBN: (纸本)9781510643185

Extended experimental verification of the recently introduced high performance sun blocking filter (SBF) design is reported. The SBF is based on a high optical quality sapphire substrate coated on both sides with multilayers including an induced transparency metal layer, protecting satellite based laser communication terminals (LCTs) telescopes against solar irradiation while simultaneously providing high transmission on the used laser wavelength at 1064.55 nm. Low earth orbit (LEO) satellite based long range LCT offer a potential solution for the highest possible data link rates and availability. Laser transmitter (TX) and receiver (RX) units require a special beam expander telescope optics. The performance of the optics can be deteriorated by the stray light and extreme thermal load conditions caused by direct sun illumination in space. Transmitted wavefront performance is a key requirement for the SBF since the total wavefront budget determines the LCTs link budget. The transmitted wavefront error (TWE) of the SBF is investigated with respect to the coating uniformity. Besides the TWE the contribution of birefringent SBF substrate to the polarization extinction budget has been experimentally verified. polarization extinction enables polarization coding between TX and RX radiation inside the LCT receiver unit. The interferometric measurements and setups of the transmitted wavefront of the SBF in dependence on substrate temperature are presented.

关键词： Sapphire induced transmittance interference coating polarization coding polarization extinction laser communication sun blocking filter wavefront error multispectral

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polarization coding by phase modulation for continuous variable optical communication

Polarization coding by phase modulation for continuous varia...

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第四届国际自动化测试与仪器仪表学术会议

作者： Huang Chunhui College of Physics and Information Engineering Fuzhou University

The electro-optical phase modulator and the circuit of homodyne detection are used to implement the continuous variable optical *** this paper,a novel experimental scheme was proposed based on LabVIEW and polarization coding by phase *** used LabVIEW programming technique included PID control,DAQmx data acquisition and triangle *** the Jones matrix theory derivation and the experimental measurements were implemented to validate a certain output of polarization *** it provided a new approach for the continuous variable QKD.

关键词： quantum key distribution quantum information polarization coding LabVIEW

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Fast polarization QKD scheme based on LiNbO₃ phase modulators

Fast polarization QKD scheme based on LiNbO<sub>3</sub> phas...

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International Conference on Micro- and Nano-Electronics

作者： Duplinskiy, A. Ustimchik, V. Kanapin, A. Kurochkin, Y. Business Ctr Ural RQC 100 Novaya St Skolkovo 143025 Moscow Reg Russia Moscow Inst Phys & Technol 9 Inst Per Dolgoprudnyi 141700 Moscow Region Russia Lomonosov Moscow State Univ GSP 1 Moscow 119991 Russia

ISBN: (纸本)9781510609501

An optical scheme for polarization encoding BB84 protocol is described. Fiber electro-optical LiNbO3 phase modulators based on Pockels cells provide both polarization states generation for Alice and basis choosing for Bob at high frequency, requiring low operation voltages (V-pi < 5V). Proposed scheme uses only one laser source, which guarantee the indistinguishability of the pulses and active basis choosing allows the system to have two single photon detectors in contrast to the four in the standard polarization encoding schemes. Two phase modulators compensate each others' polarization mode dispersion, caused by the natural birefringence of the lithium niobate crystal. The system consists of standard components and has simple configuration. The principle of operation is experimentally demonstrated.

关键词： quantum key distribution polarization coding LiNbO3 EOM birefringence

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Analysis of polarization state in quantum key distribution via single-photon two-qubit states

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OPTIK 2014年第4期125卷 1522-1525页

作者： Zhao, Gu-hao Zhao, Shang-hong Yao, Zhou-shi Hao, Chen-Lu Meng, Wen Wang, Xiang Zhu, Zhi-hang Liu, Feng Air Force Engn Univ Sch Informat & Nav Xian 710077 Shaanxi Peoples R China China Acad Space Technol Xian Branch Xian 710000 Shaanxi Peoples R China Air Force Engn Univ Sch Air & Missile Def Xian 710077 Shaanxi Peoples R China

An improved quantum key distribution scheme via single-photon two-qubit states is proposed. The input-output model of the polarization state is established. And the influence of the interferometers to the polarization state is analyzed. Quantum bit error rate of polarization coding caused by birefringent and coordinate system difference between incident light and the fast and slow axes in fiber interferometer is simulated. Furthermore, maintaining conditions of polarization state are given on this basis. (C) 2013 Elsevier GmbH. All rights reserved.

关键词： Quantum key distribution Mach-Zehnder interferometers Phase coding polarization coding Stability conditions of polarization

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polarization coding and decoding by phase modulation in polarizing Sagnac interferometers

Polarization coding and decoding by phase modulation in pola...

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Conference on Quantum Optics, Optical Data Storage, and Advanced Microlithography

作者： Liu, Xiaobao Liao, Changjun Tang, Zhilie Wang, Jindong Wei, Zhenjun Liu, Songhao S China Normal Univ Sch Informat & Optoelect Sci & Engn Guangzhou Guangdong Peoples R China South China Normal Univ Sch Phys & Telecom Engn Guangzhou Peoples R China

ISBN: (纸本)9780819470027

We present implementation of phase modulated polarization coding by polarizing sagnac interferometers. At four different low input voltages of the phase modulator, coder encodes pulse into four different polarization states, 45 degrees, 135 degrees linearly polarized or right, left circle polarized, while the decoder serves as the complementary polarizers. The mean visibility of the system is tested at 94.31%.

关键词： polarization states phase modulation polarizing M-Z interferometer Sagnac interferometer polarization coding polarization decoding phase compensation BB84 protocol B92 protocol free space quantum key distribution

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Anti-full polarization active jamming

Anti-full polarization active jamming

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2nd IEEE Conference on Industrial Electronics and Applications (ICIEA 2007)

作者： Jin Tao Qi Xiaohui Qiao Xiaolin Zhang Min Yuan Shuqing Zhang Qunxing Harbin Inst Technol Inst Elect & Informat Technol Harbin 150001 Peoples R China

ISBN: (纸本)9781424407361

For anti-full polarization active jamming, a new polarization signal processing technology is proposed in this paper. The single polarization active jamming can be identified by polarimetric radar, but the full polarization active jamming is effective to deceive polarimetric radar. Therefore, the new detection technology is necessary to be adopted against full polarization active jamming. The purpose of the paper is to present a new method for anti-full polarization active jamming. The polarization coding technology, as a new method used in polarimetric radar, is proposed and a new polarization demodulation method by included angle of polarization state between transmitter signal and echo signal on the Poincare polarization Sphere is given in the paper.

关键词： full polarization active jamming polarization coding Poincare polarization Sphere

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Quantum key distribution system based on polarization states produced by phase modulation

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Wuli Xuebao/Acta Physica Sinica 2005年第6期54卷 2534-2539页

作者： Tang, Zhi-Lie Li, Ming Wei, Zheng-Jun Lu, Fei Liao, Chang-Jun Liu, Song-Hao School for Physics and Telecom Engineering South China Normal University Guangzhou 510631 China School for Information and Optoelectronic Science and Eng. South China Normal University Guangzhou 510631 China

A method that can generate all kinds of nonorthogonal polarization states is induced for long distance and high bit rate generation quantum key distribution. The polarization states are synthesized by two linearly polarization states controlled by phase modulator. The modulator is allowed to produced non-quarter-wave phase delay so that can compensate the influence of birefringence during transmission through the fiber. The structures of the encoder and the decoder based on the method are also described that can effectively reduce the bit error rate.

关键词： Phase coding polarization coding Quantum key distribution

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