A device and method for transmitting high-precision time signals using equal-delay wavelength pairs

Abstract

The invention discloses a device for transmitting high-precision time signals through equal delay wavelength pairs and a method thereof, and relates to the technical field of optical communication and the technical field of time synchronization. The technical key points are that the device comprises a first optical transmitter, a first optical receiver, a first single-fiber bidirectional wavelength division multiplexer, a single optical fiber having the characteristics of the equal delay wavelength pairs, a second optical transmitter, a second optical receiver and a second single-fiber bidirectional wavelength division multiplexer. The first optical transmitter and the second optical receiver are connected with the first single-fiber bidirectional wavelength division multiplexer. The first single-fiber bidirectional wavelength division multiplexer is connected with one end of the optical fiber. The second optical transmitter and the first optical receiver are connected with the second single-fiber bidirectional wavelength division multiplexer. The second single-fiber bidirectional wavelength division multiplexer is connected with the other end of the optical fiber. The wavelength of the optical signals transmitted by the first optical transmitter is lambda 1, the wavelength of the optical signals transmitted by the second optical transmitter is lambda 2, and lambda 1 and lambda 2 are the equal delay wavelength pairs of the optical fiber.

Description

technical field [0001] The invention relates to the technical fields of optical communication and time synchronization, in particular to a method for transmitting high-precision time signals by using a pair of wavelengths with equal delay values ​​based on a single-fiber bidirectional wavelength division multiplexing system. Background technique [0002] At present, optical fiber communication network mainly adopts SDH (Optical Synchronous Digital Hierarchy) and Packet Transport Network (PTN) two technologies. On the long-distance backbone network, in order to increase the bandwidth of the network, wavelength division multiplexing (WDM) technology is generally used. Wavelength division multiplexing technology can increase the communication capacity of optical fiber several times or dozens of times, and has become the first choice for long-distance network large-capacity transmission systems. In the optical fiber digital communication network, the clock frequency and phase o...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problem that the existing wavelength division multiplexing system is affected by the dispersion of different wavelengths and the delay is not the same when transmitting high-precision time signals, resulting in low transmission accuracy, the present invention discloses a transmission method using equal delay wavelength pairs The method of high-precision time signal, that is, the method of transmitting a high-precision time signal by using a pair of wavelengths with equal delay values ​​in a single-fiber bidirectional wavelength division multiplexing system

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