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Measuring method for sag frequency of dispersion optical fiber

A dispersive optical fiber and frequency measurement technology, which is applied in the field of optoelectronics, can solve the problems of inability to accurately measure the frequency of the sag, and achieve the effects of resisting external environmental interference, high efficiency, and easy operation

Active Publication Date: 2015-06-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a device and method for measuring notch frequency based on curve fitting in order to solve the technical problem that the traditional method in the background technology cannot accurately measure notch frequency, so as to improve the accuracy of notch frequency measurement

Method used

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  • Measuring method for sag frequency of dispersion optical fiber
  • Measuring method for sag frequency of dispersion optical fiber
  • Measuring method for sag frequency of dispersion optical fiber

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Embodiment

[0045] figure 1 It is a structural schematic diagram of the notch frequency measuring device of the dispersion optical fiber of the present invention. The optical carrier output by the wavelength tunable laser 1 is input to the electro-optical modulator 3 through the polarization controller 2, the microwave signal output by the microwave signal source 4 is modulated onto the optical carrier through the electro-optic modulator 3, and the microwave modulated light output by the electro-optic modulator 3 The carrier wave enters the dispersion optical fiber 6 to be measured through the first optical fiber connector 51, and then enters the photodetector 7 through the second optical fiber connector 52 for photoelectric conversion. The measurement data is collected by the data acquisition card 91 to the computer 92 for data processing and analysis. The two microwave sidebands modulated on the optical carrier obtain different additional phases during the transmission process of the d...

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Abstract

The invention discloses a measuring device and method for sag frequency of a dispersion optical fiber and belongs to the technical field of photoelectrons, aiming to solve the technical problem that a traditional method can not accurately measure the sag frequency in the prior art. The advantages of strong external interference resistance, high measuring accuracy, and convenience in operation are provided. The device comprises a wave-length tunable laser, a polarization controller, a photoelectric modulator, a microwave signal source, a first optical fiber connector, a to-be-detected dispersion optical fiber, a second optical fiber connector, a photoelectric detector, a microwave power-factor meter and a data acquisition and processing system.

Description

technical field [0001] The invention belongs to the technical field of optoelectronics, relates to optical fiber communication technology and photoelectric signal processing technology, and in particular relates to a dispersion optical fiber notch frequency measuring device and a method thereof. Background technique [0002] In modern optical fiber communication, fiber dispersion is an important factor that limits the high-speed and high-quality transmission of optical signals in communication networks. Optical fiber dispersion produces different group delays for optical signals of different wavelengths, resulting in pulse broadening, causing inter-symbol interference, increasing bit error rates, and reducing communication quality. [0003] In an optical-borne microwave transmission system, fiber dispersion will cause a phase difference between the upper and lower sidebands of the microwave subcarrier, causing the received microwave signal to fade. B. Christensen et al. rep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02H04B10/07
Inventor 张尚剑邹新海叶胜威刘永
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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