Optical-fiber interferometric strain sensor using a single fiber

Journal Article · Tue Dec 01 04:00:00 EST 1992 · Experimental Techniques; (United States)

DOI:https://doi.org/10.1111/j.1747-1567.1992.tb00718.x· OSTI ID:6208192

Narendran, N; Shukla, A; Letcher, S ^[1]

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1. Mechanical Technology, Inc., Latham, NY (United States) Rhode Island Univ., Kingston (United States)

A single fiber (SF) interferometric strain sensor based on Fresnel reflections is described. A beam from the He-Ne laser which is coupled with an optical fiber via a microscope objective passes through the interaction region and part of it (beam-a) exits the fiber while the other is Fresnel reflected toward the proximal end where it is once again Fresnel reflected toward the distant end. The beam-b exits the fiber and interferes with the first beam. The combined signal is focused onto an avalanche photodiode connected to a digital storage oscilliscope and an IBM PC. The sensor is characterized by higher sensitivity than a Mach-Zehnder interferometer. 19 refs.

• OSTI ID: 6208192
• Journal Information: Experimental Techniques; (United States), Journal Name: Experimental Techniques; (United States) Vol. 16:6; ISSN 0732-8818; ISSN EXPTD2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
360603 -- Materials-- Properties
FABRY-PEROT INTERFEROMETER
FIBERS
INTERFEROMETERS
MACH-ZEHNDER INTERFEROMETER
MEASURING INSTRUMENTS
MEASURING METHODS
OPTICAL FIBERS
PHASE SHIFT
POLARIMETERS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
STRAIN GAGES
STRAINS