Multifunctional optical signal processing system

Abstract

The invention relates to a multifunctional optical signal processing system. In the system, continuous detection light and signal light are combined through a first coupler and injected into a high nonlinear optical fiber; idle light generated in the high nonlinear optical fiber due to a fourwave mixing effect is divided into two paths through an optical filter and an optical coupler and are output, wherein one output path is connected to an optical power meter, the optical power output performs feedback control on a tunable dispersion compensator so as to realize dynamic dispersion compensation, while the other output path is used as a system output signal to generate an optical signal with high extinction ratio and no dispersion; and the wavelength of the output optical signal is changed by regulating the wavelength of the detection light, so that tunable wavelength conversion is realized. The multifunctional optical signal processing system can realize HNLF (High Nonlinear Fiber), dispersion detection, extinction ratio enhancement and wavelength conversion, has the advantages of multifunction integration, high response speed, high sensitivity of dispersion detection, wide working wave band and transparency to signal speed and modulation format and can be applied to an optical transmission system with channel rate of over 40Gb/s.

Description

technical field [0001] The invention relates to the technical fields of all-optical network and high-speed, long-distance and large-capacity optical network. Background technique [0002] Since the optical fiber communication technology appeared in the 1970s, the optical fiber communication system has maintained a rapid development momentum. At present, the single channel rate has been upgraded from 2.5Gb / s to 10Gb / s, and the 40Gb / s system is also being officially deployed. At the same time, 100Gb / s has also been accepted by IEEE as the standard format for next-generation optical transmission and Ethernet . However, the increase of the transmission rate has led to the decline of the signal's tolerance to various damages during the transmission process. Transmission damage in optical fiber communication systems mainly includes: fiber loss, chromatic dispersion (CD), polarization mode dispersion (PMD), amplifier spontaneous emission noise (ASE) and nonlinear effects of optic...

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Problems solved by technology

However, the sensitivity of the above method is relatively low, it is not suitable for optical signals with high duty ratio, and it is only for dispersion monitoring, which cannot realize the regeneration and wavelength conversion of optical signals at the same time

[0005] Wavelength conversion methods include cross-gain modulation (XGM) effects based on semiconductor optical amplifiers or optical fibers, cross-absorption modulation (XAM) effects, and four-wave mixing (FWM) effects, but these methods cannot simultaneously achieve dispersion monitoring and extinction. ratio enhancement

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