Device for realizing channel self-adaptive dispersion compensation on main optical channel

Abstract

The invention discloses a device for realizing channel self-adaptive dispersion compensation on a main optical channel, comprising a channel interweave demodulation multiplexer, a channel adjustable dispersion compensator, a wave decomposition multiplexer and an optical receiver. The device for realizing channel self-adaptive dispersion compensation on a main optical channel is characterized in that main optical channel signals are divided into odd channel signals and even channel signals after being input into the channel interweave demodulation multiplexer and respectively carry out the dispersion compensation. The device for realizing channel self-adaptive dispersion compensation on a main optical channel solves the problem of insufficient bandwidth of the dispersion compensation, satisfies the requirements of a dispersion compensation bandwidth and dispersion adjusting quantity, reduces the cost of a wave decomposition system, increases the volume of the wave decomposition system and increases the transmission performance of the wave decomposition system.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a channel-level self-adaptive dispersion compensation device of a wavelength division multiplexing system. Background technique [0002] The ITU-T recommendation G.667, "Characteristics of adaptive chromatic dispersion compensators", provides a method for adaptive chromatic dispersion compensation. Single channel adaptive dispersion compensation including WDM system ( figure 1 ) and multi-channel adaptive dispersion compensation ( figure 2 ). At present, most commercial WDM systems use figure 1 In the implementation scheme, each optical receiver is equipped with an adjustable dispersion compensator; although the dispersion compensator can perform multi-channel compensation, the channel-level dispersion compensation adjustment technology is not yet mature. figure 2 scheme is rarely used. [0003] Kenya Suzuki of NTT Photon Laboratory in Japan recently reported a multi-c...

AI Technical Summary

Problems solved by technology

[0004] However, like most of the existing dispersion compensation technologies, the dispersion compensation bandwidth and the dispersion compensation amount of the channel-level adjustable dispersion compensator have a mutual restrictive relationship: when the dispersion compensation amount is large, the dispersion compensation bandwidth is small; the dispersion compensation amount When smaller, the dispersion compensation bandwidth is larger

Taking my country's 80×40Gb / s WDM system as an example, the channel spacing is 50GHz, and the signal bandwidth is approximately 50GHz, but the channel spacing of the existing multi-channel dispersion compensation with a dispersion bandwidth of 50GHz is 100GHz or 200GHz, which causes the dispersion compensator Cannot simultaneously compensate multi-channel signals with a channel spacing of 50GHz

Images