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