Self-mixing interferometry in VCSELs for nanomechanical cantilever sensing

Larsson, David; Greve, Anders; Hvam, Jørn Märcher; Boisen, Anja; Yvind, Kresten

doi:10.1364/cleo.2009.cmg2

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Advances In Engineering Research Volume 1501

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2018

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“…[18,19] . Fig.2(a) shows Schematic diagram of the proposed experimental setup; Photograph of the experimental setup as shown in Fig.2(b).…”

Section: Advances In Engineering Research Volume 150mentioning

confidence: 99%

Extremely heart-throb measurement based on laser self-mixing interferometer

Wang¹,

Yang²,

Li³

2018

Proceedings of the 2017 4th International Conference on Machinery, Materials and Computer (MACMC 2017)

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Abstract:In this paper, A heart-throb acquisition technique based on laser self-mixing is proposed. In view of the characteristics of extremely weak vibration of human heart-throb, a multiple reflection method is proposed. The objective of the external cavity is to improve the measurement accuracy by λ / 5. Fringe counting algorithm, A periodic heart-throb is successfully reconstructed. The measurement results show that the root mean square error (RMSE) the reconstructed heartthrob was 0.813 μm at 9kHz sampling rate. In addition, correlation coefficients. And heartbeat were analyzed by this method and conventional photoelectric volume meter (PPG) measurements.

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“…[18,19] . Fig.2(a) shows Schematic diagram of the proposed experimental setup; Photograph of the experimental setup as shown in Fig.2(b).…”

Section: Advances In Engineering Research Volume 150mentioning

confidence: 99%