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Proceedings Paper

Coherent photodetection for pulse profile registration
Author(s): Kalju Meigas; Hiie Hindrikus; Rain Kattai; Jaanus Lass
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Paper Abstract

The arterial pulse profile registration method using an optical coherent photodetection in a diode laser is presented. An experimental device with pigtail laser diode has been developed. This device is able to detect pulsation profiles of major arteries with potentially useful information including pulse wave velocity and profile of pulse pressure. The basis of the registration is the self- mixing that occurs in the diode laser cavity when the radiation, scattered back by the skin into the laser, interferes with the field inside it and causes the changes of the laser pump current. These changes are being registered in two different ways simultaneously; with using a photodiode accommodated in the rear facet of the diode laser package and with a help of small resistance resistor from the chain of laser pump current. The delay of pulse wave in different regions of human body is measured relatively to ECG signal. Registered signals are sorted after digitalization and pre-processed using LabView for Windows environment.

Paper Details

Date Published: 30 April 1999
PDF: 8 pages
Proc. SPIE 3598, Coherence Domain Optical Methods in Biomedical Science and Clinical Applications III, (30 April 1999); doi: 10.1117/12.347490
Show Author Affiliations
Kalju Meigas, Tallinn Technical Univ. (Estonia)
Hiie Hindrikus, Tallinn Technical Univ. (Estonia)
Rain Kattai, Tallinn Technical Univ. (Estonia)
Jaanus Lass, Tallinn Technical Univ. (Estonia)


Published in SPIE Proceedings Vol. 3598:
Coherence Domain Optical Methods in Biomedical Science and Clinical Applications III
Valery V. Tuchin; Joseph A. Izatt, Editor(s)

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