Method for eliminating carrier channel crosstalk in self zero difference detection modular division multiplexing system

A detection mode and division multiplexing technology, which is applied in the field of communication, can solve problems such as carrier channel crosstalk, achieve good bit error performance, increase transmission distance, and reduce mode selection sensitivity.

Active Publication Date: 2018-01-26
JILIN UNIV
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Problems solved by technology

[0004] Aiming at the problem of carrier channel crosstalk in the existing MDM-SHD system, the present invention proposes a ...

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  • Method for eliminating carrier channel crosstalk in self zero difference detection modular division multiplexing system
  • Method for eliminating carrier channel crosstalk in self zero difference detection modular division multiplexing system
  • Method for eliminating carrier channel crosstalk in self zero difference detection modular division multiplexing system

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Embodiment 1

[0049] The method proposed in the present invention is simulated and verified by using a 4×4 self-homodyne detection mode division multiplexing (MDM-SHD) system. figure 1 It is a schematic structural diagram of the 4 × 4 self-homodyne detection mode division multiplexing (DSB-MDM-SHD) system based on carrier-channel double-sideband modulation adopted by the present invention, and its composition includes: 1 center frequency is 193.1THz (center wavelength is 1552.5nm) DFB laser source module with a line width of 1MHz and an average output power of 3mw; two 56Gb / s PDM-QPSK signal transmitter modules; a 1:3 and a 1:2 power beam splitter module; two A 14GHz sinusoidal signal source and two Mach-Zehnder intensity modulator (MZ) modules, the drive current is 0.8A, the bias current is 0A; a pair of mode multiplexer / demultiplexer modules, the mode selection sensitivity can be Controlled according to the mode coupling matrix, the default coupling strength introduced is -25dB; two lengt...

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Abstract

The invention discloses a method for eliminating the carrier channel crosstalk in a self zero difference detection modular division multiplexing system, and belongs to the technical field of communication. According to the method, the influence of coherent beat frequency noise caused by the crosstalk of a signal path of a carrier channel in a few mode optical fiber transmission process by using the method of performing double-sideband modulation on a transmitting end and performing down-conversion restoration on a receiving end by using carrier channel pilot frequency light. By adoption of themethod, the transmission distance of the self zero difference detection modular division multiplexing (MDM-SHD) system is increased without changing the existing few mode optical fiber (FMF) parameter, the requirements of the MDM-SHD system on the mode selection sensitivity of the mode multiplexer /demultiplexer are reduced, meanwhile better BER performance can be guaranteed, and the performanceeffect is good.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a method for eliminating carrier crosstalk in a mode division multiplexing (MDM-SHD) communication system based on self-homodyne detection. Background technique [0002] In recent years, with the application and development of mobile Internet, cloud computing, and Internet of Things technologies, data services have shown an explosive growth trend. Among them, medium and short-distance optical communication represented by optical access network and data center optical interconnection urgently needs to increase network broadband capacity. At present, the intensity modulation-direct detection (IM / DD) method is widely used in short-distance optical communication. This method can only use the light intensity information, resulting in the loss of phase information and the waste of spectrum resources. Moreover, IM / DD is affected by dispersion and The influence of nonl...

Claims

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Application Information

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IPC IPC(8): H04J11/00H04B10/61
Inventor 胡贵军郭盟郝海洋段净化李娇刘云鹤黄成斌陈翠光
Owner JILIN UNIV
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