Wavelength control device and method, optical line terminal, optical network terminal and system

Abstract

The embodiment of the invention discloses a wavelength control device and method, an optical line terminal, an optical network terminal and a system, and belongs to the technical field of optical communication. The wavelength control device comprises a first adjustable filtering device and a first optical power detection device. And the first adjustable filtering device is used for receiving the first optical signal and the third optical signal of the single wavelength and outputting a second optical signal corresponding to the first optical signal and a fourth optical signal corresponding to the third optical signal, and the first adjustable filtering device adjusts a filtering peak value of the first adjustable filtering device to a target wavelength under the control of the control signal. The first optical power detection device detects optical power of the first optical signal, the second optical signal and the fourth optical signal. The optical power of the fourth optical signal is used for reflecting whether the wavelength of the third optical signal is consistent with the filtering peak value of the first adjustable filtering device. The wavelength control device enables the light source outputting the third light signal to accurately control the difference between the wavelength of the light signal output by the light source and the wavelength of the first light signal.

Description

technical field [0001] The present application relates to the technical field of optical communication, in particular to a wavelength control device and method, an optical line terminal, an optical network terminal and a system. Background technique [0002] With the continuous increase of users' demand for bandwidth and the maturity of optical fiber communication technology, the optical fiber access network has gradually become a strong competitor of broadband access network, especially the PON (passive optical network, passive optical network) system is more competitive . [0003] A PON system generally includes an OLT (optical line terminal, optical line terminal) located in a central computer room and several ONTs (optical network terminal, optical network terminal). The OLT is connected to all ONTs through an ODN (optical distribution network, optical distribution network). In order to make the PON system work normally, a pair of optical signals with a specific wavele...

AI Technical Summary

Problems solved by technology

This makes it impossible for different ONTs to be used universally, which leads to many other problems. For example, when operators issue ONTs to users, they must also know the wavelengths matched by users in advance.

Images