Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. Schematic drawing of an optical fiber (OF) placed in front of a movable reflecting mirror. The back-reflected intensity decreases when the distance, d, between the OF and the mirror increases. Figure Legend: From: Review of fiber-optic pressure sensors for biomedical and biomechanical applications J. Biomed. Opt. 2013;18(5): doi: /1.JBO

Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. Schematic drawing of two OFs in front of each other at a known distance (d). The transmitted intensity decreases when the distance, d, increases. Figure Legend: From: Review of fiber-optic pressure sensors for biomedical and biomechanical applications J. Biomed. Opt. 2013;18(5): doi: /1.JBO

Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. Schematic drawing of a differential configuration. The input light from one OF is coupled by the two OF. If the distances, d1 and d2, between the longitudinal axis of the input OF and the corresponding longitudinal axes of the two output OF increase the transmitted intensity decreases. Figure Legend: From: Review of fiber-optic pressure sensors for biomedical and biomechanical applications J. Biomed. Opt. 2013;18(5): doi: /1.JBO

Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. Schematic drawing of a typical macrobending configuration (figure-of-eight loop). A variation of elongation applied to both fiber ends is converted into a variation of curvature radius of both loops, causing the macrobending light loss effect. Figure Legend: From: Review of fiber-optic pressure sensors for biomedical and biomechanical applications J. Biomed. Opt. 2013;18(5): doi: /1.JBO

Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. Schematic drawing of a microbend configuration. The optical power leakage is a function of the microbend radio of curvature which may be induced by strain or force applied along the fiber length. Figure Legend: From: Review of fiber-optic pressure sensors for biomedical and biomechanical applications J. Biomed. Opt. 2013;18(5): doi: /1.JBO

Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. Schematic drawing of a typical Fabry-Pérot (F-P) configuration that can be used for pressure measurements. Figure Legend: From: Review of fiber-optic pressure sensors for biomedical and biomechanical applications J. Biomed. Opt. 2013;18(5): doi: /1.JBO

Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. Schematic drawing of a fiber Bragg grating (FBG). The grating acts as an effective optical filter. When illuminated by a broadband optical source, whose center wavelength is close to the Bragg wavelength (λB), a narrow band loss centered in the Bragg wavelength is present in the transmitted spectrum (the missing light appears in the grating reflection spectrum). Figure Legend: From: Review of fiber-optic pressure sensors for biomedical and biomechanical applications J. Biomed. Opt. 2013;18(5): doi: /1.JBO

Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. Schematic drawing of the pressure sensor proposed by Lekholm and Lindström. 40,45 Figure Legend: From: Review of fiber-optic pressure sensors for biomedical and biomechanical applications J. Biomed. Opt. 2013;18(5): doi: /1.JBO

Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. Schematic drawing of the pressure and oxygen saturation sensor proposed by Matsumoto et al. 124 A side membrane was used to sense pressure and a tip configuration for measurement of oxygen saturation. Figure Legend: From: Review of fiber-optic pressure sensors for biomedical and biomechanical applications J. Biomed. Opt. 2013;18(5): doi: /1.JBO

Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. Schematic drawing of earlier Camino sensors. 89 Figure Legend: From: Review of fiber-optic pressure sensors for biomedical and biomechanical applications J. Biomed. Opt. 2013;18(5): doi: /1.JBO

Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. Schematic drawing of the pressure sensor proposed by Wolthuis et al. 88,138 Figure Legend: From: Review of fiber-optic pressure sensors for biomedical and biomechanical applications J. Biomed. Opt. 2013;18(5): doi: /1.JBO