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Overcoming the speckle correlation limit to achieve a fiber wavemeter with attometer resolution

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Dholakia_2019_OptLett_SpeckleCorrFiberWavelength_AAM.pdf (1.453Mb)
Date
15/03/2019
Author
Bruce, Graham David
O'Donnell, Laura
Chen, Mingzhou
Dholakia, Kishan
Funder
EPSRC
EPSRC
The Leverhulme Trust
Grant ID
EP/R004854/1
93810-558158
RPG-2017-197
Keywords
QC Physics
DAS
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Abstract
The measurement of the wavelength of light using speckle is a promising tool for the realization of compact and precise wavemeters and spectrometers. However, the resolution of these devices is limited by strong correlations between the speckle patterns produced by closely spaced wavelengths. Here, we show how principal component analysis of speckle images provides a route to overcome this limit. Using this, we demonstrate a compact wavemeter that measures attometer-scale wavelength changes of a stabilized diode laser, eight orders of magnitude below the speckle correlation limit.
Citation
Bruce , G D , O'Donnell , L , Chen , M & Dholakia , K 2019 , ' Overcoming the speckle correlation limit to achieve a fiber wavemeter with attometer resolution ' , Optics Letters , vol. 44 , no. 6 , pp. 1367-1370 . https://doi.org/10.1364/OL.44.001367
Publication
Optics Letters
Status
Peer reviewed
DOI
https://doi.org/10.1364/OL.44.001367
ISSN
0146-9592
Type
Journal article
Rights
© 2019 Optical Society of America. This work has been made available online in accordance with the publisher’s policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1364/OL.44.001367
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/19612

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