The work entitled “Probing the ultimate limit of fiber-optic strain sensing” has been published on Science Express, (the publication on Science is expected to be on November 2010).
Published Online October 28, 2010
Science DOI: 10.1126/science.1195818
Strain measurements are crucial in several fields for both applied and fundamental research, spanning from structural engineering to aerospace, from geophysics to nanotechnology,
up to the ultrasensitive gravitational wave detectors, complex long baseline interferometers (3-4 km arm length).
On smaller scales, of the order of centimeters, fiber-optic sensors are widespread tools for high sensitivity measurements.
The paper shows the development of a fiber-optic strain sensor based on a Bragg-grating resonator with a diode laser source that is stabilized against a quartz-disciplined optical frequency comb, thereby approaching detection limits set by thermodynamic phase fluctuations in the fiber.
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