Multi-subchannel gain flat device and method

Abstract

The invention provides a multi-subchannel gain flat device and a method and relates to adjustment of subchannel gain in an optical communication system. The multi-subchannel gain flat device and the method comprise a wavelength choice switch, an optical amplifier and an optical splitter. The multi-subchannel gain flat device and the method further comprise an adjustable filter, an optical power detector and a control unit, and all parts form a monitoring loop of multi-subchannel frequency spectrum. The control unit controls the wavelength choice switch and the adjustable filter, an input signal enters into the wavelength choice switch and is output by the wavelength choice switch, the input signal enters into the optical splitter through the optical amplifier, the optical splitter splits signal light of part of power and reflects and the signal light is sent into the adjustable filter, the adjustable filter filters the signal light of par of subchannels and the signal light is input into an optical power detector, the optical power detector inputs a detecting result into the control unit, the control unit calculates decrement which corresponds to different subchannels and controls the wavelength choice switch to achieve gain flatness. A spectrometer is not used so as to reduce hardware cost, achieve automatic monitoring of multi-subchannel gain, and be high in equipment integration level and beneficial to being adopted in a large scale.

Description

technical field [0001] The invention relates to the adjustment of sub-channel gain in an optical communication system, in particular to a multi-sub-channel gain flattening device and method. Background technique [0002] The exponential growth of bandwidth has brought about continuous upgrading of optical networks. High spectral efficiency and flexible and adjustable bandwidth have become important goals for the next generation of large-capacity optical transmission systems. The modulation and transmission scheme based on multiple sub-channels can make full use of spectrum resources, construct a Tbit-level ultra-wide channel, and can realize flexible and adjustable bandwidth, which has become an important option for the next generation of optical transmission systems. Multi-sub-channels carry the required bandwidth capacity by merging multiple photon channels with continuous spectrum. Photon carriers can be generated by multiple light sources, super-continuum, etc., to meet ...

AI Technical Summary

Problems solved by technology

However, the use of spectrometers in this scheme is too expensive, and the integration of each device is low, which is not conducive to large-scale adoption in actual engineering. Therefore, it is necessary to find a simple implementation scheme to replace spectrometers and computers for automatic monitoring and realize multi-subchannel construction. Gain Flattening in Ultra Wide Channels

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