Microwave photonic transversal filter based on single wavelength and multimode fiber delay line module

A transversal filter, multimode fiber technology, applied in the coupling of optical waveguides, instruments, optics, etc., can solve the problems of low resolution and poor stability of microwave photonic filters, and achieve simple structure, simplified system, and reduced cost. Effect

Active Publication Date: 2019-05-07
SHANDONG UNIV OF TECH
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Problems solved by technology

[0007] The present invention aims at the technical defects of the prior art, and provides a microwave photon transversal filter based on a single-wavelength and multimode fiber delay line module, so as to solve the technical problems of low resolution and poor stability of conventional microwave photon filters

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  • Microwave photonic transversal filter based on single wavelength and multimode fiber delay line module
  • Microwave photonic transversal filter based on single wavelength and multimode fiber delay line module
  • Microwave photonic transversal filter based on single wavelength and multimode fiber delay line module

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[0041] Specific embodiments of the present invention will be described in detail below. In order to avoid too many unnecessary details, well-known structures or functions will not be described in detail in the following embodiments. Approximate language used in the following examples is for quantitative representations, indicating that certain variations in quantities are permissible without altering essential function. Unless defined otherwise, technical and scientific terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0042] Microwave photonic transversal filters based on single-wavelength and multimode fiber delay line modules, such as figure 1 As shown, it includes a single-wavelength light source 1, a polarization controller 2, a Mach-Zehnder modulator 3, a radio frequency signal generator 4, a laser power amplifier 5, a first collimator lens 6, a mechanical slit 7, a pl...

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Abstract

The invention provides a microwave photonic transversal filter based on single wavelength and a multimode fiber delay line module, and belongs to the field of microwave photonics. The core part of thefilter is an optical delay line module based on single optical wavelength and single multimode fiber, and combines the technical advantages of a coherent system and an incoherent system. The opticaldelay line module is constructed by single optical wavelength and the multimode fiber in the incoherent system. The single optical wavelength lowers cost and simplifies the system, the multimode fiberprovides intermodal dispersion, generates an intermode time delay, and in addition, a provided spatial wavelength division multiplexing delay line structure eliminates an optical coherence phenomenon, and exhibits high resolution ratio and flexible frequency response. On the basis of a mechanical slit, the light beam incident angle of an incident multimode fiber can be regulated, and the tunablecharacteristic of a filter tap is realized. The filtering experiment of the filter displays that a notch rejection ratio can be above 30dB, and stability is good.

Description

technical field [0001] The invention relates to the technical field of microwave photon filters, in particular to a microwave photon transversal filter based on a single-wavelength and multimode fiber delay line module. Background technique [0002] Microwave photonics combines microwave and photonics, and thus integrates the advantages of microwave and photonics, and transparently converts between radio frequency waves and optical fibers. Microwaves provide low-cost mobile wireless connections, while optical fibers provide low-cost loss of broadband connections and is immune to electromagnetic interference. [0003] Microwave photonic filter is an optical subsystem that uses optical methods to process microwave signals and realize filtering functions. As a key technology in microwave photonics, microwave photonic filters are mainly used to replace traditional methods to process radio frequency signals, that is, to use radio frequency signals to directly modulate optical ca...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/01G02B6/28G02B6/293
CPCY02D30/70
Inventor 刘晓娟刘芳芳黄燕胡平刘英
Owner SHANDONG UNIV OF TECH
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