OTDR signal injection for multi-band optical power balancing

摘要

A system includes an Optical Time Domain Reflectometer (OTDR) that injects a first OTDR signal at a first optical wavelength, a first power level and a first polarization state into an optical fiber. The system further includes an OTDR monitor that monitors multi-band optical signals on the optical fiber, selects a second power level and a second polarization state based on the monitoring of the multi-band optical signals, and determines parameters associated with the optical fiber based on the monitoring. The OTDR injects a second OTDR signal at the first optical wavelength, the selected second power level and the selected second polarization state into the optical fiber. The system operates to allow un-balanced power levels across multiple wavelength bands to be balanced due to inter-channel Raman power shift.

主权项

1. A method, comprising:
injecting, from at least one Optical Time Domain Reflectometer (OTDR), one or more first OTDR signals at one or more first optical wavelengths into an optical fiber; monitoring multi-band optical signals, including reflected OTDR signals corresponding to the first OTDR signals, on the optical fiber; determining parameters associated with the optical fiber based on the first OTDR signals and the monitoring; adjusting, at the at least one OTDR, a power level and a polarization state of one or more second OTDR signals at one or more second optical wavelengths based on the monitoring until power levels associated with the multi-band optical signals are balanced; and injecting, from the at least one OTDR, the one or more second OTDR signals at the one or more second optical wavelengths into the optical fiber.