Optoelectronics Letters

, Volume 13, Issue 2, pp 143–146 | Cite as

Non-invasive human extremely weak pulse wave measurement based on a high-precision laser self-mixing interferometer

  • Ying-bin Wei (魏颖斌)
  • Zheng Wei (魏铮)
  • Wen-cai Huang (黄文财)
  • Jie Zhang (张杰)
  • Li-juan Zhang (张丽娟)


In this paper, a technique based on laser self-mixing effect for acquiring pulse wave profile is proposed and demonstrated. For the characteristics of extremely weak vibration in human pulse waves, a method of multiple reflections with external cavity is designed to improve the measurement accuracy to λ/4. Based on the fringe counting algorithm, one period of pulse wave is successfully reconstructed. The measurement results show that the root mean square error (RMSE) of the reconstructed pulse wave is 0.912 μm at sampling rate of 8 kHz. Besides, the correlation coefficients and heart beats of this method and the traditional photoplethysmography (PPG) measurement are analyzed.

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Copyright information

© Tianjin University of Technology and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Ying-bin Wei (魏颖斌)
    • 1
  • Zheng Wei (魏铮)
    • 1
  • Wen-cai Huang (黄文财)
    • 1
  • Jie Zhang (张杰)
    • 1
  • Li-juan Zhang (张丽娟)
    • 2
  1. 1.Department of Electronic EngineeringXiamen UniversityXiamenChina
  2. 2.The First Affiliated Hospital of Xiamen UniversityXiamenChina

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