Online monitoring device for multichannel optical fibers based on power partition and OTDR

The utility model discloses an online monitoring device for multichannel optical fibers based on power partition and an OTDR (optical time domain reflectometer). The online monitoring device is characterized in that the device consists of a laser control unit, a 1*N optical divider, branching devices, OTDR processing units and a comprehensive processing unit, the comprehensive processing unit is respectively connected with the laser control unit and the N OTDR processing units, the laser control unit is connected with the 1*N optical divider, the 1*N optical divider is connected with the N branching devices, and the branching devices are respectively connected with the N OTDR processing units and optical fibers to be tested. The monitoring device can perform online monitoring for the multichannel optical fibers simultaneously and has the characteristics of high real-time properties, complete optical fiber monitoring parameters, excellent maintainability, convenient updating and low cost.