System and method for fast realizing 400G subcarrier multiplexing

Abstract

The invention discloses a system and method for fast realizing 400G subcarrier multiplexing, and relates to the field of subcarrier multiplexing in optical communication. The system comprises an OTU (optical transform unit), an OSA (optical spectrum analyzer) and an FWSS, wherein when the system realizes 400G subcarrier multiplexing, firstly, the wavelength frequency of the 100Gbit / s speed PM-QPSK (polarization-multiplexed quadrature phase shift keying) subcarriers on four output ports are respectively set on the OUT, and the wavelength intervals of the adjacent subcarriers are set according to the wavelength frequency; then, the wave channel intervals identical to the wavelength intervals of the subcarriers are set on the FWSS, the subcarriers on the four output ports are respectively configured to the corresponding frequency input ports, the FWSS carries out optical filtering on the four subcarriers, and four-carrier PM-QPSK 400Gbit / s speed optical signals are obtained through wave combining multiplexing. The system and the method have the advantages that the realization is more convenient, the performance is better, in addition, the crosstalk between the adjacent subcarriers can be reduced, and the frequency spectrum efficiency is improved.

Description

technical field [0001] The invention relates to the field of multi-carrier multiplexing in optical communication, in particular to a system and method for quickly realizing 400G multi-carrier multiplexing. Background technique [0002] With the issuance of 4G licenses (operating license rights of the 4th generation mobile communication technology), Internet services (such as Internet video, mobile Internet, etc.) have made users increasingly demanding network bandwidth and IP traffic. [0003] At present, the domestic backbone transmission network is gradually being upgraded to the 100Gbit / s (data transmission unit 100Gbit / s=1.25GB / s) WDM (Wavelength Division Multiplexing, wavelength division multiplexing) system; the key technology of 100Gbit / s optical transmission (such as polarization multiplexing, coherent reception, and digital signal processing, etc.) make the transmission distance of the N×100Gbit / s WDM system reach thousands of kilometers, and the transmission distan...

AI Technical Summary

Problems solved by technology

The 20dB spectral width of the 4 subcarriers is 62.5Ghz. If the 4 subcarriers are directly multiplexed, the 20dB spectral width of the multiplexed 400Gbit / s optical signal is 173Ghz, which cannot be applied to the wavelength division multiplexing system with the channel spacing of 150Ghz.

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