Accurately-tunable optical fiber laser microwave source with low phase noise and narrow line width

A technology with low phase noise and precise tuning, applied in the field of microwave photonics, it can solve the problems of low frequency, wide linewidth, and difficulty of precise tuning of microwave sources, and achieve the effect of reducing insertion loss.

Active Publication Date: 2010-08-04
山东中科际联光电集成技术研究院有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide a low-phase-noise narrow-linewidth precisely tunable fiber-optic laser microwave source, which can solve the problems of low frequency, high phase noise, wide linewidth, difficulty in precise tuning and high insertion loss of the microwave source

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  • Accurately-tunable optical fiber laser microwave source with low phase noise and narrow line width
  • Accurately-tunable optical fiber laser microwave source with low phase noise and narrow line width
  • Accurately-tunable optical fiber laser microwave source with low phase noise and narrow line width

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Embodiment Construction

[0027] see figure 1 As shown, the present invention provides a low-phase-noise narrow-linewidth precisely tunable fiber-optic laser microwave source, including:

[0028] A pumping source 1, the pumping source 1 is a semiconductor laser with a central wavelength of 980nm, or a semiconductor laser with a central wavelength of 1480nm;

[0029] A wavelength division multiplexer 2, the first end of the wavelength division multiplexer 2 is connected to the pump source 1;

[0030] A superstructure active Bragg phase-shifting fiber grating 3, one end of which is connected to the wavelength division multiplexer 2; the superstructure active Bragg phase-shifting fiber grating 3 is written on the hydrogen-carrying erbium-doped photosensitive fiber, or written On Ytterbium-doped, Holmium-doped, Thulium-doped, or Erbium-Ytterbium co-doped photosensitive fibers, or superstructured phase-shift gratings are fabricated on semiconductor materials, and distributed feedback is used to realize dua...

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Abstract

The invention discloses an accurately-tunable optical fiber laser microwave source with low phase noise and narrow line width, comprising a pumping source, a wavelength division multiplexer, a superstructure active Bragg phase shifted fiber grating, an absorbing liquid, a photoelectric detector and electric control telescopic piezoelectric ceramic. A first end of the wavelength division multiplexer is connected with the pumping source; one end of the superstructure active Bragg phase shifted fiber grating is connected with a second end of the wavelength division multiplexer; one end of the superstructure active Bragg phase shifted fiber grating is immersed into the absorbing liquid; the photoelectric detector is connected with a third end of the wavelength division multiplexer; and the superstructure active Bragg phase shifted fiber grating is fixed on the lateral surface of the electric control telescopic piezoelectric ceramic.

Description

technical field [0001] The invention belongs to the field of microwave photonics, and more specifically uses a dual-wavelength single longitudinal mode distributed feedback fiber laser to generate low-phase-noise narrow-linewidth and precisely tuneable microwave sources. Background technique [0002] Phased-array microwave radar, radio-on-fiber (ROF) system, wireless sensor network, and satellite communication system all require high-frequency, narrow linewidth, and low phase noise precisely tunable microwave sources. However, microwave sources based on electronic methods are limited by the performance of components, so it is difficult to generate high-frequency, low-cost, and high-stability microwaves. The photogenerated microwave method based on the beat frequency effect has been highly valued in recent years because it can generate high-frequency, narrow-bandwidth, and low-phase-noise microwave signal sources. [0003] The methods of optically generated microwaves are ma...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S1/02H04B10/12H04B10/25
Inventor 刘建国祝宁华谢亮薛力芳张红广漆晓琼
Owner 山东中科际联光电集成技术研究院有限公司
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