MUMBAI, India, Aug. 10 -- Intellectual Property India has published a patent application (202637087468 A) filed by Huawei Technologies Co. , Ltd. on July 17, 2026, for Optical Fiber Link Testing Method And Apparatus, And Optical Fiber Communication System.

Inventors include Zhang, Sen; Zuo, Tianjian; and Xiang, Qian.

The application for the patent was published on July 31, 2026, under issue no. 31/2026.

Abstract: An optical fiber link testing method and apparatus, and an optical fiber communication system, relating to the technical field of communications. An optical transmitting device generates a first optical signal carrying a test sequence, and sends the first optical signal by means of an optical fiber link. The first optical signal is transformed into a second optical signal after being transmitted by means of the optical fiber link, the second optical signal comprising the first optical signal and a reflected optical signal. An optical receiving device receives the second optical signal by means of the optical fiber link, the optical receiving device demodulates the second optical signal to obtain the test sequence, and the optical receiving device determines the transmission performance of the optical fiber link on the basis of the demodulated test sequence. In the present application, the transmission performance of an optical fiber link is tested by using the existing optical transmitting device and optical receiving device in an optical fiber communication system, and the optical fiber link can be tested without deploying an additional device in the optical fiber link, so that the hardware implementation for testing an optical fiber link is simple, and the test costs are relatively low.

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