Optical signal amplification device and transmission system

Abstract

Embodiments of the present application disclose an optical signal amplifying device and a transmission system. The device includes: a Raman amplifying unit and a positive dispersion compensating unit, wherein the positive dispersion compensating unit is disposed between the gain unit and the Raman amplifying unit. time; the Raman amplifying unit is used to generate pump light, and the pump light amplifies the input optical signal in the gain unit; the positive dispersion compensation unit is used to positively amplify the pump light Toward dispersion compensation. In this way, the purpose of suppressing the four-wave mixing and ensuring the normal amplification of the optical signal is achieved. At the same time, the device can weaken the channel crosstalk from the four-wave mixing band, enhance the performance of the system, and improve the pump utilization rate in the non-zero dispersion-shifted fiber.

Description

technical field [0001] The present application relates to the technical field of optical communication, and in particular to an optical signal amplification device and a transmission system. Background technique [0002] Because the four-wave mixing will transfer part of the energy of the optical signal to generate a new wavelength, which will result in a power loss for a specific channel, resulting in a loss of the energy of the original optical signal and a waste of pumping light. At the same time, if the new wavelength is the same as or superimposed on a certain wavelength of the original signal segment, it will cause channel crosstalk, thereby greatly reducing system performance. In addition, the four-wave mixing signal generated by four-wave mixing will continue to be amplified like optical signals as the transmission distance increases, and the four-wave mixing signal cannot be eliminated by any method. [0003] However, the low dispersion value of the non-zero disper...

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Problems solved by technology

[0002] Because the four-wave mixing will transfer part of the energy of the optical signal to generate a new wavelength, which will lead to the power loss of the specific channel, the original optical signal energy will be lost, and the pump light will also be wasted.

At the same time, if the new wavelength is the same as or superimposed on a certain wavelength of the original signal segment, it will cause channel crosstalk, which will greatly reduce system performance

In addition, the four-wave mixing signal generated by four-wave mixing will continue to be amplified like optical signals as the transmission distance increases, and the four-wave mixing signal cannot be eliminated by any method

[0003] However, the low dispersion value of non-zero dispersion-shifted fiber is not enough to suppress and offset the influence of four-wave mixing caused by the increase of optical power

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