Ultra-high rate ultra-dense wave-division multiplexing optical signal-to-noise ratio monitoring method and system

Abstract

The invention relates to an optical signal-to-noise ration monitoring method and device, and especially relates to an ultra-high rate ultra-dense wave-division multiplexing optical signal-to-noise ratio monitoring method and system. By combining an intrinsic ASE spectrum function of an optical amplifier and the gain spectrum function obtained by the input end and the output end of the optical amplifier, the difference convergence between the intrinsic ASE spectrum function and the gain spectrum function is realized through an intrinsic ASE spectrum function modification factor, and finally, the accurate intrinsic ASE spectrum function is obtained; and a precise optical signal-to-noise ratio value is obtained through the final intrinsic ASE spectrum function and the amplifier output optical power spectrum function. By using the method disclosed by the invention, the accurate monitoring of the ultra-high rate ultra-dense wave-division multiplexing optical signal-to-noise ratio can be realized, and the testing error is reduced.

Description

technical field [0001] The invention relates to an optical signal-to-noise ratio monitoring method and system, in particular to an ultra-high rate ultra-dense wavelength division multiplexing optical signal-to-noise ratio monitoring method and system. Background technique [0002] With the rapid increase of business traffic, the original 2.5G, 10G and 40G services can no longer meet the current application requirements. 100G has been commercialized on a large scale, and 200G and 400G services have begun to be gradually commercialized. Increasing the number of channels by increasing the interval between them can significantly increase the transmission capacity of the system. Currently, the most widely used channel intervals are 100GHz (corresponding to 0.8nm) interval and 50GHz (corresponding to 0.4nm) interval, and 37.5GHz (corresponding to 0.3nm) interval It has also been gradually commercialized. [0003] The optical signal-to-noise ratio (OSNR) is one of the key performa...

AI Technical Summary

Problems solved by technology

The optical power of the in-band signal is the total power in the channel minus the optical power of the in-band ASE noise. The optical power of the in-band ASE noise is measured by turning off the channel, or estimated by taking the average value of the left and right sides. For high-speed For services with small channel intervals, both methods have certain errors

[0005] In addition, for non-polarization multiplexed high-speed services, the polarization decomposition method can be used for testing, and the error is small, but the biggest disadvantage is that only non-polarization multiplexed service light can be monitored, while for 200G and 400G service signal light, both is based on polarization multiplexing, so this method is not applicable

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