Multi-carrier optical signal generation device and method based on doped echo squash

Abstract

The invention discloses a multi-carrier light signal generation device based on a doped whispering gallery ball. The device comprises a pulse light source, a pump light source, the doped whispering gallery ball, a first micro-nanofiber, and a second micro-nanofiber, wherein the doped whispering gallery ball is arranged between a light signal iteration part of the first micro-nanofiber and a lightsignal iteration part of the second micro-nanofiber, and comprises M photonic crystal waveguides and M parametric waveguides which are alternately arranged; a parametric process of the photonic crystal waveguides is a forward parametric process for stimulating the number of carriers; and a parametric process of the parametric waveguides is a reverse parametric process for amplifying the amplitudesof carrier signals. The device disclosed by the invention has the advantages that optimization is carried out on the basis of multi-carrier light source generation through four-wave mixing, and the multiple parametric processes are cascaded in a hybrid manner, so that the number of multi-carriers can be effectively increased, noises can be reduced, the transmission system performance can be improved, a lower error rate, higher band efficiency and a longer transmission distance can be achieved, a bandwidth can be flexibly allocated, and a signal modulation order is not changed.

Description

technical field [0001] The present invention relates to the technical field of multi-carrier transmission, in particular to a device and method for generating multi-carrier optical signals based on doped echo squash. Background technique [0002] In recent years, communication networks and Internet services have been increasing, and people have higher and higher requirements for network capacity and bandwidth. These have prompted many scholars to conduct research on optical communication systems with Tb / s and above rates. Modulating signals onto frequency-locked optical carriers and using multi-wavelength transmission is an effective means to achieve ultra-large-capacity transmission. [0003] The frequency-locked multi-carrier long light source is the basis for realizing multi-wavelength large-capacity transmission. At present, the methods for generating multi-carrier light sources mainly include: multi-carrier generator based on cyclic frequency shifter, supercontinuum se...

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Problems solved by technology

[0005] At present, multi-carrier light sources generated by the four-wave mixing effect are more common, but there will be some problems in this way. The increase in the number of carriers will lead to a reduction in power. Once the power is lower than the four-wave mixing threshold, it cannot be cascaded further. Stimulate new carriers, so the number of generated carriers will be limited by the low optical power

Although the carrier wave can be amplified by using the erbium-doped fiber amplifier, and continue to use the four-wave mixing effect to excite a new carrier wave, but this amplification method generates more noise, resulting in a low carrier-to-noise ratio of the light source

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