Work

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

Year: 2019

Type: article

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.

Source: Optics Letters

DOI: 10.1364/ol.44.001367

Authors: Graham D. Bruce, Laura O’Donnell, Mingzhou Chen, Kishan Dholakia

Institution: University of St Andrews

Language: English

Topic: Optical measurement and interference techniques

Subfield: Computer Vision and Pattern Recognition

Field: Computer Science

Domain: Physical Sciences

Open Access status: bronze

Funders: Leverhulme Trust, Engineering and Physical Sciences Research Council

Awards: G1853365418, M Squared - St Andrews Biophotonics Nexus, G2791641862, MCLAREN: Miniaturised Cold Atom Gravimeter for Space Applications