Transmission system and method based on modular division multiplexing

Abstract

The invention discloses a transmission system and method based on modular division multiplexing. The transmission system comprises a transmitting device and a receiving device, wherein the transmitting device comprises a signal source and a transmitter; the signal source provides at least one channel of electrical signals for the transmitter; and the transmitter modulates the electrical signals onto an optical carrier, converts the electrical signals into optical signals, divides the optical signals into multiple channels of optical signals in different modes, and multiplexes the optical signals together, so that modular division multiplexing signals are generated. According to the transmission system and method provided by the invention, the transmitter modulates the electrical signals into the optical signals, divides the optical signals into multiple channels of optical signals in different modes, and multiplexes the optical signals, so that the modular division multiplexing signalsare generated; the modular division multiplexing signals are transmitted to the receiving device through an optical fiber link; then, the receiving device de-multiplexes the signals into multiple channels of fundamental mode optical signals in the same mode; the optical power in each mode is reduced; therefore, the nonlinear effect excited by each mode is reduced; the total nonlinear effect is inhibited; the nonlinear tolerance of optical fiber transmission is improved in the optical fiber link transmission; and thus, the signal transmission quality and distance are improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a transmission system and method based on mode division multiplexing. Background technique [0002] In the prior art, a single-mode optical fiber is generally used for transmission, and the optical fiber transmission is limited by the emission power and the nonlinearity of the optical fiber. Or use few-mode fiber for transmission, only one high-order mode is applicable, and there is no mode multiplexing, so that the tolerance of optical signals to nonlinearity can be improved to a certain extent under the condition of high transmission power, but further improvement is still needed. Contents of the invention [0003] Therefore, the present invention provides a transmission system and method based on mode division multiplexing to improve signal transmission quality and distance. [0004] An embodiment of the present invention provides a transmission and transmission device ba...

AI Technical Summary

Problems solved by technology

[0002] In the existing technology, single-mode fiber is generally used for transmission, and fiber transmission is limited by the emission power and the nonlinearity of the fiber

Or use few-mode fiber for transmission, only one high-order mode is applicable, and there is no mode multiplexing, so that the optical signal has a certain improvement in the tolerance of nonlinearity under the condition of high transmission power, but further improvement is still needed

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