Optical fiber time domain reflectometer otdr, test system, test method, and storage medium

A test system based on an optical fiber time domain reflectometer OTDR, wherein the system comprises:

• an OTDR, wherein the OTDR comprises an input end, which is used for receiving an input service optical signal;
• a first filter, which is connected with the input end and is used for filtering an interference signal in the service optical signal with a wavelength equal to a test wavelength of the OTDR;
• a wavelength division multiplexing WDM device, which has a reflection end, a transmission end and an output end, wherein the reflective end is connected with the first filter and is used for receiving the service optical signal filtered by the first filter;
• and an OTDR basic unit, which is connected with the transmission end and is used for emitting an OTDR signal with a wavelength equal to the test wavelength and receiving a return signal of the OTDR signal, wherein an emission parameter of the OTDR signal and a return parameter of the return signal are used for evaluating a performance index of an optical fiber connected with the output end of the WDM device;
• wherein the output end of the WDM device is used for outputting the filtered service optical signal received from the reflection end, outputting the OTDR signal received from the transmission end, and receiving the return signal returned from the optical fiber;
• a service signal emitter, which is connected with the input end of the OTDR, and is used for emitting a service optical signal;
• and
• a to-be-detected optical fiber, which is connected with an output end of the OTDR.

A test method based on an optical fiber time domain reflectometer OTDR, wherein the method comprises:

• determining a test wavelength of the OTDR according to a wavelength of a service optical signal;
• emitting an OTDR signal to a to-be-detected optical fiber according to the test wavelength;
• filtering out an interference signal in the service optical signal whose wavelength is equal to the test wavelength;
• and
• receiving and analyzing a return signal of the OTDR signal returned by the to-be-detected optical fiber, wherein an emission parameter of the OTDR signal and a return parameter of the return signal are used for evaluating a performance index of an optical fiber connected with an output end of the WDM device.