Compressible fiber optic micro-Fabry-Pérot cavity with ultra-high pressure sensitivity
- 5 June 2013
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 21 (12) , 14084-14089
Abstract
We propose and demonstrate a pressure sensor based on a micro air bubble at the end facet of a single mode fiber fusion spliced with a silica tube. When immersed into the liquid such as water, the air bubble essentially acts as a Fabry-Pérot interferometer cavity. Such a cavity can be compressed by the environmental pressure and the sensitivity obtained is >1000 nm/kPa, at least one order of magnitude higher than that of the diaphragm-based fiber-tip sensors reported so far. The compressible Fabry-Pérot interferometer cavity developed is expected to have potential applications in highly sensitive pressure and/or acoustic sensing.Keywords
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