Open AccessNanometric sensing with laser feedback interferometry
Author(s) -
Daeyoung Choi,
Michael J. Wishon,
E. A. Viktorov,
D. S. Citrin,
Alexandre Locquet
Publication year - 2019
Publication title -
optics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.44.000903
Subject(s) - optics , interferometry , laser , lidar , materials science , remote sensing , physics , geology
We demonstrate a nanometric sensor based on feedback interferometry in a distributed feedback (DFB) laser by using a measurement of either the optical frequency or laser voltage. We find that in an optimal range of optical feedback, the sensor operates reliably down to an extrapolated 12 nm; for the sensor demonstrated here at ∼1550 nm, this provides a minimum detectible displacement of λ/130.
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