The working principle of the optical time domain reflectometer

the working principle of OTDR:

OTDR English full name is the Optical Time Domain Reflectometer, the Chinese meaning for the Optical Time Domain Reflectometer. OTDR is the use of light propagation in optical fiber Rayleigh scattering and Fresnel reflex of backscattering and made integrated precision of photoelectric instrument, it is widely used in the maintenance of optical cable lines, construction of optical fiber length, fiber optic transmission attenuation can be, coupling attenuation measurement and fault location.

fiber optic cable test is an important technology to optical cable construction, maintenance, repair, using OTDR ( Optical time domain reflectometer) Measure the scene monitoring and coupling loss of optical fiber connection, is currently the most effective way. This method is intuitive and reliable and can print out the optical fiber to the scattering signal curve. In addition, at the same time of monitoring can be more accurately measured by the station to the actual transmission distance of each joint point, to the maintenance of accurate malfunction, effective treatment failure is very necessary. Also require maintenance staff to grasp the instrument performance, skilled operation, accurate judgment signal curve characteristics.