An optical fiber eigenmode multiplexing communication method and system

Abstract

The invention discloses an optical fiber eigenmode multiplexing communication method and system. The method comprises the following steps: directly taking optical fiber eigenmode as an information carrier, and then performing low-crosstalk multiplexing transmission on multiple optical fiber eigenmodes in the eigenmode separated multi-model optical fiber. The system comprises a transmitting end, a multichannel eigenmode multiplexer, the eigenmode separated multimode optical fiber, the eigenmode separated optical amplifier, a multichannel eigenmode de-multiplexer and a receiving end; the effective refractive index difference between the multichannel optical fiber eigenmodes supported by the eigenmode separated multimode optical fiber is large and the crosstalk is low; the multichannel eigenmode multiplexer realizes the conversion and the multiplexing to the optical fiber eigenmode from the multichannel Gaussian mode; the multichannel eigenmode multiplexer realizes the conversion and de-multiplexing to the Gaussian mode from the multichannel optical fiber eigenmode; the multiplexing and the de-multiplexing are extensible and provide the single mode optical fiber interface. The optical fiber eigenmode multiplexing communication method disclosed by the invention supports the low-crosstalk multiplexing communication of the multichannel optical fiber eigenmode, the multi-in and multi-out digital signal processing is unnecessary, the single model optical fiber is compatible, and the communication capacity and the spectrum efficiency can be effectively improved.

Description

technical field [0001] The invention belongs to the field of optical fiber communication and guided wave optics, and more specifically relates to a communication method and system for optical fiber eigenmode multiplexing. Background technique [0002] With the high informatization of society, higher requirements are put forward for optical communication systems, especially backbone optical communication systems, which are characterized by large information capacity, long transmission distance, high communication quality and good system reliability. According to the current development speed, the capacity of the entire network will increase by at least 100 times in the next ten years, while the increase in the capacity of conventional single-mode optical fiber communication systems during the same period will lag behind the growth rate of network traffic by an order of magnitude. At the same time, with the rapid development of the mobile Internet in recent years, the amount o...

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Problems solved by technology

In addition, for the traditional mode-division multiplexing based on linear polarization mode, due to the serious mode crosstalk between linear polarization modes, it is necessary to supplement the multiple-input multiple-output digital signal processing technology (Multiple-Input Multiple-Output Digital Signal Processing Technology) in the linear polarization mode multiplexing communication system. Signal Processing, MIMO-DSP), which significantly increases the cost and complexity of the system, and increases dramatically with the number of modes

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