Double pump wide band optical fiber parameter amplifier

Abstract

The invention is a double-pumping wide-band optical-fiber parameter amplifier, composed of two pumping lasers, a pumping coupler, a signal laser, a signal coupler, a wave division multiplexer and a high-nonlinear optical fiber triple-cascaded in turn. The zero-dispersion wavelength of the first-stage optical fiber is close to the central wavelengths of two pumping lights, the second-order dispersion of the second-stage optical fiber in the position of central wavelength of the pumping light is positive and that of the third-stage is negative. The two pumping lights and a signal light are coupled by the wave division multiplexer and then enter into the triple optical fiber in turn, which generates an idle light after they passing through the first-stage optical fiber whose output end has a gain spectrum approximately symmetrical around the central wavelength of the pumping light but uneven, reduces the unevenness of the curve of the gain spectrum after they passing through the second-stage optical fiber and corrects the gain spectrum after they passing through third-stage optical fiber. It can cover low-loss window of full wave optical fiber, thus able to fully use the bandwidth of the full wave optical fiber to push forward the WDM optical-fiber communication system.

Description

technical field [0001] The invention relates to a dual-pump broadband optical fiber parametric amplifier (FOPA), in particular to a three-stage highly nonlinear optical fiber cascaded double-pump broadband optical fiber parametric amplifier, which is suitable for optical fiber communication systems and networks. Background technique [0002] The current optical fiber communication system widely uses wavelength division multiplexing (WDM), which can effectively use the bandwidth of optical fiber to realize large-capacity, long-distance optical fiber communication, and can increase the number of services in the user distribution system. In the application of these wavelength division multiplexing technologies, multiple amplifiers with larger bandwidths are required to be cascaded to compensate the loss of each channel at the same level, thereby realizing multi-wavelength ultra-long-distance transmission. However, the traditional erbium-doped fiber amplifier (EDFA) can only pro...

AI Technical Summary

Problems solved by technology

The single-pump single-stage fiber parametric amplifier has obtained a gain bandwidth of 200nm in the laboratory, but the gain flatness is very poor, making it difficult to apply to the wavelength division multiplexing system

The Chinese invention patent with the application number 200410025214.0 proposes to use four-stage cascaded highly nonlinear optical fibers to form a single-pumped multi-stage optical fiber parametric amplifier. This amplifier can theoretically provide a bandwidth of 320nm, but its bandwidth cannot cover the full-wave optical fiber. Low loss window (1250-1650nm), at the same time, the amplifier uses a large number of highly nonlinear fiber stages, which increases the splice loss

Images