Static fiber-Bragg grating strain sensing using frequency-locked lasers

Ady Arie, Boaz Lissak, Moshe Tur

Research output: Contribution to journalArticlepeer-review

Abstract

Novel and highly sensitive static strain interrogation technique is demonstrated, where the sensing element is a fiber-Bragg grating (FBG) and the light source is a frequency-locked diode laser. Locking the laser frequency to the center of an absorption line (atomic line of potassium in our experiment) eliminates the slow frequency drift of the laser. The stabilized laser source is used to measure low frequency ('static') strain, with a sensitivity of 1.2 nanostrain/√Hz rms at 1.5 Hz.

Original languageEnglish
Pages (from-to)1849-1855
Number of pages7
JournalJournal of Lightwave Technology
Volume17
Issue number10
DOIs
StatePublished - Oct 1999

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