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Title: Phase modulation with micromachined resonant mirrors for low-coherence fiber-tip pressure sensors
Authors: Zhang, Xuming
Liu, Yuxiang
Bae, H.
Pang, C.
Yu, M.
Subjects: Interferometers
Light sources
Miniature instruments
Phase modulation
Issue Date: 21-Dec-2009
Publisher: Optical Society of America
Source: Optics express, 21 Dec. 2009, v. 17, no. 26, p. 23965-23974.
Abstract: This letter presents a simple phase modulation scheme for interrogation of low-coherence interferometry based fiber-tip pressure sensors to enable real-time monitoring and miniaturization of the entire sensor system. The key idea is to introduce a sinusoidal modulation signal and retrieve the sensing cavity length change using a simple algorithm, without resorting to any time information. In experiments, phase modulation has been achieved by using a silicon-micromachined tunable Fabry-Pérot interferometer, which is integrated with a light source and a photodiode onto a single chip. Compared with the conventional interrogation methods, this scheme possesses the merits of being less susceptible to disturbance, easy control and easy miniaturization, making it particularly suitable for sensing in constrained spaces and harsh environments.
Rights: © 2009 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Type: Journal/Magazine Article
DOI: 10.1364/OE.17.023965
ISSN: 1094-4087
Appears in Collections:AP Journal/Magazine Articles

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