May 2011
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14 Reads
Proceedings of SPIE - The International Society for Optical Engineering
We describe a new sensor for patient's breathing measurement by using fiber loop ringdown spectroscopy. The sensing system consists of a typical single mode fiber-loop ring-down spectroscopy and a sensor mat which is used to introduce breathing related optical loss. The sensor mat could be put in the chair or embedded in the bed. It is non invasive measurement. The breathing rate sensor is demonstrated with an accuracy of +/-2 breaths per minute and stable sensor output.