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Optical Engineering

Development and optimization of a miniaturized fiber-optic photoplethysmographic sensor
Author(s): Aisha Morley; John J. Davenport; Michelle Hickey; Justin P. Phillips
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Paper Abstract

Photoplethysmography (PPG) is a widely used technique for measuring blood oxygen saturation, commonly using an external pulse oximeter applied to a finger, toe, or earlobe. Previous research has demonstrated the utility of direct monitoring of the oxygen saturation of internal organs, using optical fibers to transmit light between the photodiode/light emitting diode and internal site. However, little research into the optimization and standardization of such a probe has yet been carried out. This research establishes the relationship between fiber separation distance and PPG signal, and between fiber core width and PPG signal. An ideal setup is suggested: $1000 - μ m$ fibers at a separation distance of 3 to 3.5 mm, which was found to produce signals around 0.35 V in amplitude with a low variation coefficient.

Paper Details

Date Published: 30 November 2017
PDF: 5 pages
Opt. Eng. 56(11) 117111 doi: 10.1117/1.OE.56.11.117111
Published in: Optical Engineering Volume 56, Issue 11
Show Author Affiliations
Aisha Morley, City Univ. of London (United Kingdom)
John J. Davenport, City Univ. of London (United Kingdom)
Michelle Hickey, City, Univ. of London (United Kingdom)
Justin P. Phillips, City, Univ. of London (United Kingdom)