Publication Date:
2010-10-30
Description:
The measurement of relative displacements and deformations is important in many fields such as structural engineering, aerospace, geophysics, and nanotechnology. Optical-fiber sensors have become key tools for strain measurements, with sensitivity limits ranging between 10(-9) and 10(-6)epsilon hertz (Hz)(-1/2) (where epsilon is the fractional length change). We report on strain measurements at the 10(-13)epsilon-Hz(-1/2) level using a fiber Bragg-grating resonator with a diode-laser source that is stabilized against a quartz-disciplined optical frequency comb, thus approaching detection limits set by thermodynamic phase fluctuations in the fiber. This scheme may provide a route to a new generation of strain sensors that is entirely based on fiber-optic systems, which are aimed at measuring fundamental physical quantities; for example, in gyroscopes, accelerometers, and gravity experiments.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gagliardi, G -- Salza, M -- Avino, S -- Ferraro, P -- De Natale, P -- New York, N.Y. -- Science. 2010 Nov 19;330(6007):1081-4. doi: 10.1126/science.1195818. Epub 2010 Oct 28.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Consiglio Nazionale delle Ricerche-Istituto Nazionale di Ottica (INO) and European Laboratory for Non-Linear Spectroscopy (LENS), Comprensorio A. Olivetti, Via Campi Flegrei 34, I-80078 Pozzuoli (Naples), Italy. gianluca.gagliardi@ino.it〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21030606" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
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Chemistry and Pharmacology
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Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
