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Optical fiber dispersion measuring method based on dual-wavelength mode locking pulse fiber laser

A fiber laser and mode-locked pulse technology, which is used in optical instrument testing, machine/structural component testing, and measurement devices, etc., can solve the problems of low dispersion measurement accuracy, cumbersome measurement process, and high measurement device cost, and achieve high measurement accuracy. , Easy to operate, low cost effect

Inactive Publication Date: 2017-08-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of low dispersion measurement accuracy, high cost of measurement devices, and cumbersome measurement process in the background technology, and propose a fiber dispersion measurement method based on a dual-wavelength mode-locked pulsed fiber laser

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  • Optical fiber dispersion measuring method based on dual-wavelength mode locking pulse fiber laser
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  • Optical fiber dispersion measuring method based on dual-wavelength mode locking pulse fiber laser

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Embodiment Construction

[0034] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0035] The invention provides a method for measuring fiber dispersion based on a dual-wavelength mode-locked pulsed fiber laser, the system structure of which is as follows figure 1 As shown, it includes a pump source 1 , a polarization-dependent integrated optical device 2 , a polarization controller 3 , an optical fiber to be tested 4 and an erbium-doped gain optical fiber 6 . The polarization-dependent integrated optical device 2 , the polarization controller 3 , the fiber to be tested 4 and the erbium-doped gain fiber 6 are sequentially connected through a standard single-mode fiber 5 in a closed loop. The pump source 1 is connected to the input end of the polarization-dependent integrated optical device 2, and the output end of the polarization-dependent integrated optical device 2 outputs dual-wavelength mode-locked pulses.

[0036] Wherein, the p...

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Abstract

The invention discloses an optical fiber dispersion measuring method based on a dual-wavelength mode locking pulse fiber laser. The object of the invention is to solve the technical problems of the prior art such as tedious dispersion measuring processes and high costs of measuring devices. A system comprises a pumping source (1), a polarization-related integrated optical device (2), a polarization controller (3), a to-be-measured optical fiber (4), and an erbium-doped gain fiber (6), which are sequentially connected together by standard single-mode fibers. An RF frequency spectrograph is used to measure a frequency interval of dual-wavelength mode locking pulses, and a spectrum analyzer is used measure a central wavelength interval, and then the intracavity pure dispersion value of the to-be measured optical fiber before and after being loaded on the system is calculated, and then the dispersion value of the to-be-measured optical fiber is acquired by the simple calculation. The optical fiber dispersion measuring method has advantages of simple structure, convenient operation, high measurement precision, and applicability in dispersion measurement of various single-mode optical fibers.

Description

technical field [0001] The invention belongs to the field of optical fiber measurement, and in particular relates to an optical fiber dispersion measurement method based on a dual-wavelength mode-locked pulse optical fiber laser. Background technique [0002] According to statistics, Internet traffic is rapidly increasing at a rate of doubling every 12 months, and there is no slowing down trend. Therefore, it is necessary to develop high-speed optical fiber communication in order to meet the growing demand for bandwidth. In terms of expanding the transmission capacity of high-speed optical fiber communication systems, multiplexing techniques are mainly used at present, such as optical time division multiplexing (OTDM) and dense wavelength division multiplexing (OWDM). Among them, a key technology of OTDM is the generation of ultrashort optical pulse. Passively mode-locked fiber laser is considered to be a very promising OTDM light source because it can directly output ultr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/00
CPCG01M11/336
Inventor 杜文雄李和平夏汉定申圣男张尚剑刘永
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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