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Proceedings Paper

Design and optimization of a widely tunable semiconductor laser for blood oxygenation and blood flow measurements
Author(s): Yafei Feng; Haoyu Deng; Guangyi Song; Jian-Jun He
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Paper Abstract

A method for measuring blood oxygenation and blood flow rate using a single widely tunable semiconductor laser is proposed and investigated. It is shown that a 700-nm-band tunable laser gives the highest sensitivity for blood oxygen measurement. The corresponding tunable laser is designed using the V-coupled cavity structure. The wavelength tuning range can reach 8 nm, which is sufficient for the blood oxygenation measurement in the 700-nm-band by using the Beer- Lambert law. In contrast to conventional blood oxygenation measurement method based on two LEDs, the laser can be used at the same time to measure the blood flow rate based on the Doppler principle.

Paper Details

Date Published: 3 December 2014
PDF: 6 pages
Proc. SPIE 9267, Semiconductor Lasers and Applications VI, 926712 (3 December 2014); doi: 10.1117/12.2073345
Show Author Affiliations
Yafei Feng, Zhejiang Univ. (China)
Haoyu Deng, Zhejiang Univ. (China)
Guangyi Song, Zhejiang Univ. (China)
Jian-Jun He, Zhejiang Univ. (China)

Published in SPIE Proceedings Vol. 9267:
Semiconductor Lasers and Applications VI
Ninghua Zhu; Werner H. Hofmann, Editor(s)

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