Wideband-simulated photon link dispersion decline compensation scheme based on intensity modulation diversity transmitter

An intensity modulation and transmitter technology, applied in the direction of eliminating distortion/dispersion, optical fiber transmission, etc., can solve the problems of complex structure, high cost, limited dispersion fading compensation ability, etc., and achieve the effect of low cost and simple structure

Inactive Publication Date: 2013-01-30
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

Although the existing dispersion compensation mechanisms can well compensate for the dispersion fading of microwave signals, these schemes still have various deficiencies, such as the need...

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  • Wideband-simulated photon link dispersion decline compensation scheme based on intensity modulation diversity transmitter
  • Wideband-simulated photon link dispersion decline compensation scheme based on intensity modulation diversity transmitter
  • Wideband-simulated photon link dispersion decline compensation scheme based on intensity modulation diversity transmitter

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] like figure 1 As shown, the dispersion fading compensation scheme of the present invention consists of a continuous light source 10 , an intensity modulation diversity transmitter 20 , a fiber amplifier 30 , a section of single-mode fiber 40 and a photodetector 50 . The key of the invention is to propose an intensity modulation diversity transmitter and apply it to the dispersion fading compensation of the broadband analog photonic link. The structure of the intensity modulation diversity transmitter 20 is as figure 2 As shown, its main components are a polarization modulator 202 and two analyzers (206, 209). The polarization modulator 202 is a special phase modulator, which can simultaneously modulate the transverse electric mode and the transverse magnetic mode, but the phase modulation indices of the two modes are opposite. The linearly polarized light ou...

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Abstract

The invention discloses a wideband-simulated photon link dispersion decline compensation scheme based on an intensity modulation diversity transmitter. A wideband-simulated photon link dispersion decline compensation mechanism consisting of a sending end and a receiving end is adopted, wherein the sending end consists of a light source and an intensity modulation diversity transmitter, and the receiving end consists of a single-mode fiber and a photoelectric detector; and mutual compensation is achieved through diversity transmission by utilizing the characteristic that the two paths of intensity signals of the diversity transmitter have different dispersion decline frequency points in the transmission of the single-mode fiber. According to the invention, under the condition that only one light source and one modulator is used, the wideband-simulated photon link dispersion decline compensation scheme which can enable the maximum power fluctuation of a radio-frequency signal to be 4-dB in the 20G Hz bandwidth range is finally obtained by adjusting the analyzing degree of two paths of modulating signals and delay inequality, and the scheme has the advantages of simple structure, low cost, easiness in achievement and large compensation range.

Description

technical field [0001] The invention relates to the fields of microwave photonics and optical fiber communication, especially the technical field of microwave signal dispersion fading compensation. Background technique [0002] Microwave photonics is a subject that uses optical methods to realize microwave signal processing. Because photonic technology has the advantages of large bandwidth, strong parallel processing capability, small size, light weight, and anti-electromagnetic interference, the optical processing of microwave signals is expected to solve the bottleneck problems of small processing bandwidth, slow speed, and weak processing capability of existing microwave systems. Microwave photonic technology includes microwave signal generation, transmission, filtering, delay and many other aspects, and has broad application prospects in communication, radar, phased array antenna and other fields. With the continuous development and maturity of lasers and optical fibers...

Claims

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Application Information

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IPC IPC(8): H04B10/2513
Inventor 郭迎辉闫连山陈智宇姜恒云潘炜罗斌邹喜华张志勇
Owner SOUTHWEST JIAOTONG UNIV
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