Optical module and optical fiber link online monitoring system

By combining a photodetector and a transimpedance amplifier in the optical module, real-time online breakpoint detection of optical fiber links is achieved, solving the high-cost operation and maintenance problem in existing technologies and reducing the operation and maintenance cost of optical fiber link detection.

CN224264980UActive Publication Date: 2026-05-19INNOLIGHT TECHNOLOGY (SUZHOU) LTD +1
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Patent Information

Application Number
CN202521011135.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-21
Publication Date
2026-05-19
Estimated Expiration
2035-05-21

AI Technical Summary

Technical Problem

In existing technologies, fiber optic link breakpoint detection needs to be performed offline, resulting in high maintenance costs and inconvenience in setting up optical modules outdoors.

Method used

Design an optical module comprising a photodetector, a transimpedance amplifier, and a monitoring unit. The photodetector uses a single optical fiber to receive data and detect signals. Signals are acquired through the low-speed sampling end of the transimpedance amplifier for online breakpoint detection. The monitoring unit does not need to be connected to a high-speed link to avoid interference.

Benefits of technology

It enables real-time monitoring and online breakpoint detection of fiber optic links, reduces detection costs, avoids interference with normal communication, and saves on optical module costs.

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Abstract

The utility model provides an optical module and an optical fiber link online monitoring system, and relates to the technical field of optical communication. The optical module comprises an optical detector, a trans-impedance amplifier and a monitoring unit, and the optical detector is used for receiving a data optical signal and a detection optical signal which are input through an external optical fiber and converting the data optical signal and the detection optical signal into a data electric signal and a detection electric signal respectively. The input end of the transimpedance amplifier is electrically connected with the optical detector so as to receive data electric signals and detection electric signals output by the optical detector. The low-speed sampling end of the transimpedance amplifier is electrically connected with the sampling part of the monitoring unit, and the sampling part obtains a sampling signal through the low-speed sampling end and transmits the sampling signal to the control and processor; and the control and processor is used for processing an alternating current sampling signal in the sampling signals so as to determine the fault position of the external optical fiber. On the basis of low cost, real-time monitoring and online breakpoint detection can be carried out on the optical fiber link.
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