Mode division multiplexing transmission system based on multimode optical fiber

A multi-mode fiber, mode division multiplexing technology, applied in the field of optical information, can solve the problem of limited utilization of signal-to-noise ratio, and achieve the effect of strong anti-electromagnetic interference ability, small crosstalk, and improved capacity

Inactive Publication Date: 2015-05-27
HANGZHOU DIANZI UNIV
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Problems solved by technology

However, the rapid growth of transmission system capacity has brought greater pressure to switching systems, and its signal-to-noise ratio requirements limit its further utilization

Method used

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  • Mode division multiplexing transmission system based on multimode optical fiber
  • Mode division multiplexing transmission system based on multimode optical fiber

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Embodiment Construction

[0023] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] Such as figure 1 As shown, this embodiment is based on the mode division multiplexing transmission system of multimode optical fiber, and the transmission modulus is assumed to be n (n is an integer greater than or equal to 2), so there are n channels. The mode division multiplexing transmission system based on multimode fiber includes a signal source 1, an optical power splitter 1-1, and in the first channel, includes: a first optical modulator 2-1, a first polarization controller 3-1, The first optical isolator 4-1, the first end-face emission functional mode filter 5-1; ...; the nth channel includes: nth optical modulator 2-n, nth polarization controller 3-n, nth optical modulator 2-n, nth polarization controller 3-n, nth channel n optical isolator 4-n, the nth mode filter with end-face emission function filter 5-n; the first f...

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Abstract

The invention discloses a mode division multiplexing transmission system based on a multimode optical fiber. The system comprises n channels, wherein signal sources of the channels are connected with n light modulators through light power beam splitters; the n light modulators, n polarization controller, n opto-isolators and n first mode filters are sequentially connected; the n first mode filters respectively emit light in the channels to a first mode multiplexer which multiplexes light to a first multi-mode optical fiber; the first multi-mode optical fiber is connected with a first mode demultiplexer which demultiplexes signals to n add-drop multiplexers; the n add-drop multiplexers respectively emit light to a second mode multiplexer through n second mode filters, the second mode multiplexer multiplexes n signals to an erbium-doped optical fiber amplifier, the erbium-doped optical fiber is connected with a second multimode optical fiber, the second multimode optical fiber is connected with the second mode demultiplexer, the second mode demultiplexer respectively demultiplexes light to n mode filters, and the n mode filters are respectively connected with n light receivers.

Description

technical field [0001] The invention belongs to the technical field of optical information, and in particular relates to a mode division multiplexing transmission system based on a multimode optical fiber. Background technique [0002] The traditional single-mode optical fiber is the most ideal physical medium for the backbone network to realize high-speed, large-capacity transmission. With the development of wavelength division multiplexing (WDM) technology, digital information of hundreds of Gbit / s or even Tbit / s can be transmitted in one optical fiber. However, the rapid growth of transmission system capacity has brought greater pressure to switching systems, and its signal-to-noise ratio requirements limit its further utilization. [0003] In order to overcome the limitation on the signal rate of single-mode optical fiber transmission, the present invention is based on the mode division multiplexing multiple input and output system of multi-mode optical fiber, which can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/2581H04J14/04
Inventor 李齐良宋俊峰陈心李舒琴胡淼魏一振周雪芳卢旸
Owner HANGZHOU DIANZI UNIV
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