Optical fiber transmission detection system and optical fiber transmission detection method

Abstract

The invention belongs to the technical field of optical fiber communication, and discloses an optical fiber transmission detection system and an optical fiber transmission detection method. The system comprises a distributed optical fiber sound wave sensing device and a main controller; a scrambler unit and a photoelectric switch group are arranged on the distributed optical fiber sound wave sensing device; a first output interface in the photoelectric switch group is connected with the scrambler unit in series; the main controller controls a first output interface or a second output interface in the photoelectric switch group to be switched on, so as to control the scrambler unit to be effectively added or not added into the system; the photoelectric switch is added to the optical fiber transmission detection system to work in an OTDR mode or a DAS mode, so that the transmission performance of an optical fiber to be detected is detected. Due to the fact that the scrambler unit and the optical switch group are additionally arranged, two optical signals can be generated through a single light source, integration of two modes is achieved. Compared with the prior art, the system is simple in structure, reliable in formation and simple in control logic and control technology.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to an optical fiber transmission detection system and an optical fiber transmission detection method. Background technique [0002] Distributed Fiber Acoustic Sensing System (hereinafter referred to as DAS) is a fiber optic transmission detection system developed based on distributed fiber optic sensing technology. It is based on the Rayleigh scattering effect of optical signals during optical fiber transmission and the principle of optical time domain reflectometry (OTDR), and integrates multiple disciplines such as optics, electronics, mechanics, and digital signal processing. A comprehensive new distributed optical fiber Sensing Technology Systems. [0003] At present, when two detections of DAS and OTDR are realized in one system at the same time, the realization method is to directly integrate the DAS system and the OTDR system through two switches, such as...

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Problems solved by technology

[0004] The main purpose of the present invention is to solve the problem that the structure of the existing DAS and OTDR system is complicated, and the compatible control of the two modes cannot be realized

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