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Fiber Rayleigh scattering signal detector

A technology of Rayleigh scattering and detectors, applied in the field of optical communication, can solve the problems of low collection efficiency and achieve the effects of improved collection efficiency, strong scalability, and simple assembly

Inactive Publication Date: 2009-10-14
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

A patent EP 0915356A1 submitted by Herbert Walter of Deutsche Telekom, US 6,265,710B1, proposed a method of inferring the signal in the fiber by collecting the Rayleigh scattering signal radiated out of the silica fiber, but it has the disadvantage of low collection efficiency

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  • Fiber Rayleigh scattering signal detector

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Embodiment Construction

[0020] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and processes are provided, but the protection scope of the present invention is not limited to the following implementations example.

[0021] Such as figure 1 As shown, a fiber optic Rayleigh scattering signal detector based on the principle of total reflection includes: an elliptical cylinder of quartz, which is composed of two semi-elliptical cylinders 2, 3 cut along the major axis direction, There are two circular channels of equal size at the two focal points of the elliptical cylinder, and a photodetector 4 with the same shape and length as the channel is arranged in one of the channels.

[0022] The length of the elliptical cylinder is 10-30mm.

[0023] The outer wall of the elliptical cylinder is coated w...

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Abstract

The invention relates to a fiber Rayleigh scattering signal detector of the optical communications technology field. The invention comprises an elliptical quartz cylinder which is composed of two semi-ellipse cylinders cut along the prolate axis, two circular channels with the same size at the two focused points of the semi-ellipse cylinders, wherein one circular channel is provided with a photodetector with the same channel size and length. A rogue fiber, after being stripped, is put into one circular channel at one focused point of the semi-ellipse cylinder and cylindrical photoelectric detector is put into the other circular channel at the other focused point of the semi-ellipse cylinder. The highly reflective metal film coated outside the semi-ellipse cylinder can realize the full reflection of lights in the elliptical cylinder. The collection structure can effectively improve the collection efficiency of optical signal and has the advantages of simple structure, low cost, simple assembly and the like.

Description

technical field [0001] The invention relates to a device in the technical field of optical communication, in particular to an optical fiber Rayleigh scattering signal detector based on the principle of total reflection. Background technique [0002] For a long time, people have insufficient understanding of the security of optical networks. Traditionally, it is believed that optical fiber communication has the characteristics of good confidentiality and strong anti-interference ability, thus ignoring the security analysis of optical fiber communication. In recent years, with the deepening understanding of optical devices in optical networks and the gradual deepening of research on network security and network attack methods, the security of optical networks has become an important topic. Due to the high transmission data rate of the optical network, the transmission rate of a single optical fiber exceeds the T-bit level, so even a short-term attack will cause a large amount...

Claims

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Application Information

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IPC IPC(8): H04B10/08H04B10/07
Inventor 肖石林史杰韦建文陈荷
Owner SHANGHAI JIAO TONG UNIV
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