Transmission system and method based on modular division multiplexing

A mode-division multiplexing and transmission method technology, applied in the field of transmission system based on mode-division multiplexing, can solve the problems of optical fiber transmission, such as limited transmission power, optical fiber nonlinearity, etc., to reduce nonlinear effects, reduce optical power, and improve transmission Effects of mass and distance

Active Publication Date: 2018-09-18
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Transmission system and method based on modular division multiplexing
  • Transmission system and method based on modular division multiplexing
  • Transmission system and method based on modular division multiplexing

Examples

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Embodiment 1

[0040] An embodiment of the present invention provides a transmission and emission device based on mode division multiplexing, which can be applied to optical transmission of radar received signals, access network, inter-data center, and short-distance communication within a data center, such as figure 1 As shown, it includes: a signal source 1 and a transmitter 2, wherein the signal source 1 is used to provide at least one electrical signal to the transmitter 2; the transmitter 2 is used to modulate the electrical signal to an optical carrier and convert it into an optical signal , and divide the optical signal into multiple optical signals of different modes and multiplex them together to generate a mode-division multiplexed signal. In the embodiment of the present invention, the mode division multiplexing signal is transmitted through the optical fiber link 3 , specifically, a few-mode optical fiber may be used as the optical fiber link 3 .

[0041] The above-mentioned mode...

Embodiment 2

[0050] An embodiment of the present invention provides an optical fiber transmission system based on mode division multiplexing, including: a transmitting device and a receiving device, wherein the transmitting device, such as image 3 As shown, it includes: a signal source 1 and a transmitter 2, wherein the signal source 1 is used to provide at least one electrical signal to the transmitter 2; the transmitter 2 is used to modulate the electrical signal to an optical carrier and convert it into an optical signal , and divide the optical signal into multiple optical signals of different modes and multiplex them together to generate a mode-division multiplexed signal. In the embodiment of the present invention, the mode division multiplexing signal is transmitted through the optical fiber link 3 . The receiving device is a receiver 4, which is used to convert the mode division multiplexing signal into multiple channels of the same basic mode optical signal, after delay processin...

Embodiment 3

[0072] An embodiment of the present invention provides a transmission system based on mode division multiplexing, including: a signal source 1, a first coupler 5, a transmitter 2, an optical fiber link 3 and a receiver 4, wherein the signal source 1 is used to send The transmitter 2 provides two electrical signals; the first coupler 5 combines the two electrical signals provided by the signal source into an electrical signal; the transmitter 2 is used to modulate the electrical signal onto an optical carrier and convert it into an optical signal, and The optical signal is divided into multiple optical signals of different modes and multiplexed together to generate a mode division multiplexing signal; the optical fiber link 3 is used to transmit the mode division multiplexing signal; the receiver 4 is used to convert the mode division multiplexing signal The signal is converted into multiple optical signals of the same basic mode, and after delay processing, it is then converted...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/25H04B10/516H04J14/04
CPCH04B10/25891H04B10/516H04J14/04
Inventor 高冠军许丞邓鹏跃申一帆杨真张杰
Owner BEIJING UNIV OF POSTS & TELECOMM
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