Multiplexer and demultiplexer, transmitter and receiver, optical fiber communication system and methods

Abstract

The invention provides a multiplexer and a demultiplexer, a transmitter and a receiver, periodic orthogonal waveform signal generation units, an optical fiber communication system and corresponding methods. The multiplexer that is used for multiplexing a plurality of user signals comprises: a plurality of periodic orthogonal waveform signal generation units, which are configured to generate a plurality of periodic orthogonal waveform signals in a paired orthogonal mode; an electric modulator, which is configured to respectively modulate a plurality of user signals to the plurality of periodic orthogonal waveform signals; and an electric combiner, which is configured to mixing the plurality of modulated signals into a single signal. According to the invention, the periodic orthogonal waveform signals in a paired orthogonal mode are used as basic multiplexing units and the different user signals are respectively modulated to the periodic orthogonal waveform signals; and the modulated signals are mixed into the single signal so as to generate an optical signal, so that signal transmission in an optical fiber can be realized conveniently. Therefore, the communication transmission capacity and the bandwidth utilization efficiency can be substantially improved.

Description

technical field [0001] The present invention relates to optical fiber communication technology, and more particularly to an optical fiber communication system, a multiplexer, a demultiplexer, a transmitter and a receiver used in the optical fiber communication system, a periodic orthogonal waveform signal generating device and Their corresponding multiplexing method and demultiplexing method, sending method and receiving method, and periodic orthogonal waveform signal generation method. Background technique [0002] With the high-speed development of optical fiber communication technology, the modulation rate of single wavelength is getting higher and higher, the circuit is becoming more and more difficult to realize, the power consumption is increasing, and the optical pulse is becoming narrower and narrower. When the optical signal is transmitted in the optical fiber, it is more and more susceptible to the influence and limitation of dispersion and nonlinearity, so a lot o...

AI Technical Summary

Problems solved by technology

Another example is dense wavelength division multiplexing technology. Due to the limitation of the gain flat bandwidth of the fiber amplifier EDFA, the transmission bandwidth of dense wavelength division multiplexing is limited to the C+L band, which limits the number of wavelengths that can be used. At the same time, as As the number of wavelengths increases, the nonlinear effect also increases; in addition, the higher the rate, the narrower the pulse width, and the wider the spectral width it occupies, which limits the application of dense wavelength division multiplexing

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