Research Papers: Sensing

Noninvasive respiration movement sensor based on distributed Bragg reflector fiber laser with beat frequency interrogation

[+] Author Affiliations
Jianghai Wo

Huazhong University of Science and Technology, National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Wuhan 430074, China

He Wang

Huazhong University of Science and Technology, National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Wuhan 430074, China

Qizhen Sun

Huazhong University of Science and Technology, National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Wuhan 430074, China

Perry Ping Shum

Huazhong University of Science and Technology, National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Wuhan 430074, China

Nanyang Technological University, OPTIMUS, School of Electrical and Electronic Engineering, Singapore 639798, Singapore

Deming Liu

Huazhong University of Science and Technology, National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Wuhan 430074, China

J. Biomed. Opt. 19(1), 017003 (Jan 20, 2014). doi:10.1117/1.JBO.19.1.017003
History: Received August 15, 2013; Revised November 27, 2013; Accepted December 16, 2013
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Abstract.  A distributed Bragg reflector fiber laser-based respiration movement monitoring system has been proposed and experimentally demonstrated. To fabricate the sensing element for respiration monitoring, a fixture that consists of a plastic plate, a section of elastic textile is employed to experience and transfer the belly expansion induced pressure onto the cross-section of the laser cavity. By tracing the change of the beat signal that generates between two polarization lasing modes, the information of the respiration movement can be extracted in real time. Experimental studies have demonstrated that the system is able to detect both respiration waveform and rate simultaneously. Moreover, the recorded results show that the different gestures as well as the physiology conditions can be distinguished by monitoring the amplitude and period change of the waveform. It is anticipated that the proposed fiber laser-based sensor would be highly suitable for respiratory monitoring.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Jianghai Wo ; He Wang ; Qizhen Sun ; Perry Ping Shum and Deming Liu
"Noninvasive respiration movement sensor based on distributed Bragg reflector fiber laser with beat frequency interrogation", J. Biomed. Opt. 19(1), 017003 (Jan 20, 2014). ; http://dx.doi.org/10.1117/1.JBO.19.1.017003


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