Accelink Technologies Co., Ltd.

Jiantao Zhang

Peng Zhang

Chengpeng Fu

Qinlian Bu

Chunping Yu

Cuihong Zhang

Tao Xiong

Menghui Le

Qi Zhou

Zhijun Ye

Disclosed are an optical fiber time domain reflectometer (OTDR), a test system, test method, and a storage medium. The OTDR comprises: an input end for receiving an input service optical signal; a first filter connected with the input end and for filtering an interference signal with a wavelength equal to a test wavelength of the OTDR in the service optical signal; a wavelength division multiplexing WDM device having a reflection end, a transmission end and an output end; and an OTDR basic unit connected with the transmission end and used for emitting an OTDR signal equal to a test wavelength and receiving a return signal of the OTDR signal, wherein the output end of the WDM device is for outputting a 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.

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

The present disclosure relates to a signal processing system applied to remove OTDR noise, comprising: an analog-to-digital converter, a laser and driving unit, a sequence accumulator, a preprocessing counter, a pulse generator, a dual-port memory, a self-adaptive filter, an event decision device, and a preprocessing data decision device. The self-adaptive filter reads preprocessing data from a read-only port of the dual-port memory, and performs noise processing on the read preprocessing data by using a self-adaptive filtering method of wavelet transform. The event decision device performs an event decision on the filtered data output from the self-adaptive filter; The preprocessing data decision device decides whether a certain set of preprocessing data in m groups of preprocessing data is correct data or high-signal-to-noise data according to the difference of the m groups of preprocessing data after passing through the event decision device.

Signal processing system applied to remove OTDR noise

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Hubei, China

Jiantao Zhang