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Proceedings Paper

Measuring the fluid velocity with the self-mixing speckle of the erbium-doped fiber ring laser
Author(s): Li Ma; Yaqun Guo; Daofu Han
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Paper Abstract

The measuring method of the fluid velocity is studied by self-mixing speckle interferometry. A measuring system making up of the ring erbium-doped fiber laser is devised to achieve the information of the fluid velocity. Through Injection- Seeded Erbium-doped fiber ring laser transcendental equation, an equation about the fluid velocity and laser power modulated by self-mixing speckle can be inferred. The relationship between average frequency of the self-mixing speckle signal and the fluid velocity is analyzed, and that how does the average energy spectrum density change with the fluid velocity is studied. In experiments, a suitable signal processing method can be chosen with the grade of the velocity. The experiment is indicated that it is the linear between self-mixing speckle signal and the fluid velocity. The result of the experiments is indicated that self -mixing speckle metrology based on the erbium-doped fiber ring laser can be applied to real time detection of the fluid velocity.

Paper Details

Date Published: 8 September 2011
PDF: 8 pages
Proc. SPIE 8191, International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies, 81910K (8 September 2011); doi: 10.1117/12.899489
Show Author Affiliations
Li Ma, Nanchang Univ. (China)
Yaqun Guo, Nanchang Univ. (China)
Daofu Han, Nanchang Univ. (China)


Published in SPIE Proceedings Vol. 8191:
International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies
Yuelin Wang; Huikai Xie; Yufeng Jin, Editor(s)

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