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《Semiconductor Optoelectronics》 2001-06
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Application of Polarized Light in Secret Communication

HU Qing 1, WANG Min qi 1, YUAN Sui hua 2 (1. Dept.of Telecom.,Chongqing University of Posts and Telecommunications,Chongqing 400065,China; 2. Dept.of Physics,Southwest China Normal University,Chongqing 400715,China)  
The polarity of light transmitting in polarization maintaining fibers in a secret communication system is dependent on artificial and environmental interference in the fiber.The polarity may be taken as sensing parameter to detect in real time the wiretapping.This gives an extra security in addition to the ordinary secret coding.The data of background noise has been set up for the system without wiretapping at temperature in the range of -35~55 ℃.The threshold of wiretapping detecting is defined by the bend radius of the fiber.
【Fund】: 重庆市科委资助项目
【CateGory Index】: TN929.11
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4 MA Chang gui Southwest Institute of Applied Magnetics, Mianyang 621000, China;Magneto-optical Devices and Their Applications to Optical Communications[J];Journal of Magnetic Materials and Deuices;2001-06
5 Zhao Wenyu Ji Yuefeng Xu Daxiong(Beijing University of Posts and Telecommunications,Beijing 100876);Research on the Security Management of All-optical Networks[J];Telecommunications Science;2001-05
6 Hu Liaolin Liu Zengji (National Key Lab. of Integrated Service Networks, Xidian Univ., Xian 710071, China);Status and Some Key Technologies for Optical Fiber Communication[J];It Age;2004-02
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