26 November 2007 Flow velocity measurements using self-mixing effect inside a single-mode VCSEL with polymer optical fiber
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Abstract
We demonstrate a laser Doppler velocimeter (LDV) based on self-mixing effect in a single longitudinal mode VCSEL for velocity measurement of flowing milk using Polymer Optical Fiber (POF). We find that self-mixing signal in frequency domain was broadened using POF compare with space coupled. The flow velocity was measured when POF outside and inside the milk. Their self-mixing signals of power spectrum can be fitted with Gaussian and exponential decay function, respectively. The differences of self-mixing signal in frequency domain when POF outside and inside milk are discussed. Due to POF have the advantages of flexibility and compatible with biology, this velocimeter can also be used for the measurement of blood flow in vivo.
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Rongsheng Zheng, Rongsheng Zheng, Huaqiao Gui, Huaqiao Gui, Chun Gu, Chun Gu, Chunchong Chen, Chunchong Chen, Jie Yan, Jie Yan, Tianpeng Zhao, Tianpeng Zhao, Fugui Yang, Fugui Yang, Hai Ming, Hai Ming, } "Flow velocity measurements using self-mixing effect inside a single-mode VCSEL with polymer optical fiber", Proc. SPIE 6830, Advanced Sensor Systems and Applications III, 683025 (26 November 2007); doi: 10.1117/12.758687; https://doi.org/10.1117/12.758687
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