High-resolution absolute frequency referenced fiber optic sensor for quasi-static strain sensing

Journal Article · Tue Jul 20 00:00:00 EDT 2010 · Applied Optics

DOI:https://doi.org/10.1364/AO.49.004029· OSTI ID:22036514

Lam, Timothy T.-Y.; Chow, Jong H; Shaddock, Daniel A; Littler, Ian C. M.; Gagliardi, Gianluca; Gray, Malcolm B; McClelland, David E

We present a quasi-static fiber optic strain sensing system capable of resolving signals below nanostrain from 20 mHz. A telecom-grade distributed feedback CW diode laser is locked to a fiber Fabry-Perot sensor, transferring the detected signals onto the laser. An H{sup 13}C{sup 14}N absorption line is then used as a frequency reference to extract accurate low-frequency strain signals from the locked system.

• OSTI ID: 22036514
• Journal Information: Applied Optics, Vol. 49, Issue 21; Other Information: (c) 2010 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6935
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
FABRY-PEROT INTERFEROMETER
FEEDBACK
FIBERS
LASER RADIATION
RESOLUTION
SENSORS
STRAINS