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Large-capacity optical fiber-rail angular momentum wave fusion system

An orbital angular momentum, optical fiber technology, applied in the field of communication, can solve the problems of increasing system complexity, cost and cost, and achieve the effect of reducing system complexity, improving communication capacity, and being easy to implement

Inactive Publication Date: 2018-03-20
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the use of multiple transmit and receive antennas increases system complexity, cost and penalty

Method used

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  • Large-capacity optical fiber-rail angular momentum wave fusion system
  • Large-capacity optical fiber-rail angular momentum wave fusion system
  • Large-capacity optical fiber-rail angular momentum wave fusion system

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with specific experimental examples and accompanying drawings.

[0038] Depend on figure 1 As shown, the components and functions of the central station of the optical fiber-orbital angular momentum wave fusion system are described as follows:

[0039] Data source 1, generating digital baseband signal a 1 (t), data source 11, produces digital baseband signal a 2 (t), laser 2, produces wavelength λ 1 A continuous wave laser, laser 22, produces a wavelength λ 2 The continuous wave laser, the external modulator 3, the digital baseband signal a generated by the data source 1 1 (t) modulated to the wavelength λ produced by laser 2 1 On the continuous wave laser, the external modulator 33 converts the digital baseband signal a generated by the data source 2 2 (t) modulated to the wavelength λ produced by laser 22 2 On the continuous wave laser, the optical wavelength division multiplexer 4 realizes th...

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Abstract

The invention belongs to the technical field of communication, in particular to a large-capacity optical fiber-rail angular momentum wave fusion system. The system is implemented by the following steps that: synthesis of two paths of light baseband signals or light microwave signals is realized by a wavelength division multiplexer at a transmitting end, then optical fiber transmission is entered,and a wavelength division multiplexed signal is demultiplexed with an array waveguide; the demultiplexed light signal is converted into an electric baseband signal or an electric microwave signal through a photelectric detector, and two paths of electric signals are converted into a rail angular momentum multiplexed signal to be transmitted through a single rail angular momentum antenna after up-conversion is realized with an electric frequency mixer; and a rail angular momentum antenna at a receiving end demultiplexes a received signal, and a baseband signal is recovered with an electric downconverter and a low-pass filter. Through adoption of the large-capacity optical fiber-rail angular momentum wave fusion system, the use of a plurality of antennas is avoided, and the system complexity is lowered. Moreover, wavelength division multiplexing and rail angular momentum space multiplexing are combined, so that the communication capacity and spectrum efficiency of the system are increased greatly.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to an optical fiber-wireless fusion communication system based on multiplexing of orbital angular momentum. Background technique [0002] With the rapid growth of communication capacity and access requirements, the fiber-wireless communication system, which combines the advantages of optical fiber transmission with low loss, high bandwidth and anti-electromagnetic interference, and wireless communication wide-area coverage and flexible access, has become a research hotspot. It is considered to be the most promising alternative for next-generation ultra-broadband wireless access. In the ROF system, combined with optical wavelength division multiplexing (WDM) technology, the optical signals modulated to different wavelengths can be multiplexed into one optical fiber for transmission, which greatly improves the communication capacity. However, considering the nonline...

Claims

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Application Information

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IPC IPC(8): H04B10/2575H04B10/54H04J14/02H04B10/532H04J14/06
CPCH04B10/25758H04B10/25759H04B10/532H04B10/54H04J14/0279H04J14/06
Inventor 朱子行迟楠余建军
Owner FUDAN UNIV
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