All-optical caching method for realizing orthogonal mode in four-wave mixing mode

Abstract

The invention provides an all-optical caching method for realizing an orthogonal mode in a four-wave mixing mode. The all-optical caching method comprises the following steps of: inputting a modulatedoptical signal into a duplicator by adopting a pump; generating idler frequency light according to a frequency formula by means of a first four-wave mixing module; determining the sequence length ofall waveforms entering a cache region in a time domain by means of an input switch; after the signal enter the cache, injecting a pump signal into a recovery unit in a lower branch locking process, meanwhile, guiding signal waves and idler frequency waves to an upper branch, and carrying out phase and polarization adjustment; after upper and lower branches are combined, inputting PSA for signal compensation; and when buffering is not needed any more, activating an output switch and outputting an optical signal, and using a modulator in a pumping recovery branch circuit to adjust the relative phase and the pumping power, so as to realize empty or write-in operation on an optical buffer. According to the all-optical caching method, a duplicator type phase-sensitive amplifier is adopted, so that amplification of lower noise can be realized, multi-wavelength cache time control is realized, and the stability and transmission quality of a transmission system are improved at the same time.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and in particular relates to an all-optical buffer method for realizing an orthogonal mode through a four-wave mixing method. Background technique [0002] Since the 1980s, optical fiber transmission technology has developed rapidly, such as the transmission capacity of single-mode optical fiber has exceeded 10Tbit / s. However, the switching mode of photoelectric conversion is still used on the transmission nodes of the optical network. This switching mode is difficult to realize an ultra-high-speed transmission network, and it is easy to cause network congestion and increase the maintenance cost of the system network. Therefore, once the transmission capacity and transmission speed reach a certain level, it will be difficult for the photoelectric conversion method to meet the requirements, so the all-optical switching technology emerges as the times require. [0003] An all-optical...

AI Technical Summary

Problems solved by technology

However, it is very difficult to strictly lock the phase and wavelength of the signal / idler / pump at the input of the PSA

This shortcoming has hindered the basic application of FND-PSA in the past few years

[0006] Transmission experiments on FND-PSA in some previous studies have demonstrated its potential as a low-noise amplifier, however, noise-free amplification for wideband and format modulation is still not possible

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