【摘要】 利用保偏光纤双折射对环境的响应 ,提出了通过探测偏振光偏振度的变化进行实时在线侦知窃听的光纤通信系统 ,在密码保密通信的基础上 ,进一步提高了光纤通信的保密程度。记录了无窃听时系统在 - 35～ 5 5℃背景下的噪声数据。得到了能窃听的裸光纤弯曲半径阈值更多还原

【Abstract】 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.更多还原