Measuring the fluid velocity with the self-mixing speckle of the erbium-doped fiber ring laser

Li Ma; Yaqun Guo; Daofu Han

doi:10.1117/12.899489

8 September 2011 Measuring the fluid velocity with the self-mixing speckle of the erbium-doped fiber ring laser

Li Ma, Yaqun Guo, Daofu Han

Proceedings Volume 8191, International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies; 81910K (2011) https://doi.org/10.1117/12.899489
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

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.

Citation Download Citation

Li Ma, Yaqun Guo, and Daofu Han "Measuring the fluid velocity with the self-mixing speckle of the erbium-doped fiber ring laser", Proc. SPIE 8191, International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies, 81910K (8 September 2011); https://doi.org/10.1117/12.899489

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