Method and system for achieving real-time measurement of big bandwidth optical signal radio frequency spectrums

A real-time measurement and radio spectrum technology, applied in the field of photoelectric detection, can solve problems such as limited capability, and achieve the effects of large measurement bandwidth, simple structure and wide application range

Inactive Publication Date: 2017-11-03
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose a method and system capable of realizing real-time measurement of the radio frequency spectrum of a large-bandwidth optical signal, so as to overcome the extremely limited capability of the prior art in this application field.

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  • Method and system for achieving real-time measurement of big bandwidth optical signal radio frequency spectrums
  • Method and system for achieving real-time measurement of big bandwidth optical signal radio frequency spectrums
  • Method and system for achieving real-time measurement of big bandwidth optical signal radio frequency spectrums

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Embodiment Construction

[0037] like figure 1 The method and system for real-time measurement of the radio frequency spectrum of a large-bandwidth optical signal include: a mode-locked laser unit 1, a first large dispersion unit 2, a polarization controller unit 3, an optical coupler unit 4, a nonlinear device unit 5, an optical A filter unit 6, a second largest dispersion unit 7, a photodetector unit 8, and a real-time oscilloscope 9. The first large dispersion unit or the second large dispersion unit can be realized by selecting optical fiber, Bragg chirped grating, multimode waveguide, or wavelength division multiplexer.

[0038] The nonlinear device unit 5 can be realized by using highly nonlinear optical fibers, silica waveguides, silicon-based waveguides, silicon nitride waveguides, arsenic sulfide waveguides or highly nonlinear organic integrated devices. The nonlinear device unit, the first and second large dispersion units are all integrated on the chip. The photodetectors are high-speed ph...

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Abstract

The invention relates to a method and a system for achieving real-time measurement of big bandwidth optical signal radio frequency spectrums. The system comprises an ultrashort pulse source, a first big chromatic dispersion unit, a polarization controller, an optical coupler, a non-linear device, an optical filter, a second big chromatic dispersion unit, a photoelectric detector and a real-time oscilloscope. According to the invention, when the radio frequency spectrum of the signal is changed from the MHz to the GHz, real-time measurement of the frame rate speed can be achieved directly on the radio frequency information of a to-be-measured signal in the time domain; by directly converting the radio frequency measurement of light carriers from the measurement in the electrical domain into the measurement in the optical domain, broadband limitations of the photoelectric detector are avoided; and the method and the system are characterized by capability of measuring the big radio frequency broadband of 100GHz or above.

Description

technical field [0001] The invention relates to the technical field of photoelectric detection, in particular to a method and system for real-time measurement of radio frequency spectrum of a wide bandwidth optical signal. Background technique [0002] The radio frequency spectrum refers to the Fourier spectrum of the intensity envelope of the electromagnetic field. Light is also an electromagnetic wave, which can be used as a carrier wave and has the advantages of wide bandwidth and anti-electromagnetic interference. With the rapid development of optical communication technology and microwave photonics technology, radio spectrum measurement of optical carrier has been widely used in scientific research such as signal quality monitoring of optical communication, radio communication, radar system, and electronic integrated chip. In these scientific researches, the information to be detected is usually loaded on the large-bandwidth radio frequency spectrum of the optical carri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/16H04B10/079
CPCG01R23/16H04B10/07951H04B10/07955H04B10/07957
Inventor 张新亮张驰陈燎段玉华周希杨宁宁
Owner HUAZHONG UNIV OF SCI & TECH
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