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Journal article

Speckle-based spectrometer

By Chakrabarti, Maumita1,2; Jakobsen, Michael Linde1,3; Hanson, Steen Grüner1,3

From

Department of Photonics Engineering, Technical University of Denmark1

Diode Lasers and LED Systems, Department of Photonics Engineering, Technical University of Denmark2

Optical Sensor Technology, Department of Photonics Engineering, Technical University of Denmark3

A novel spectrometer concept is analyzed and experimentally verified. The method relies on probing the speckle displacement due to a change in the incident wavelength. A rough surface is illuminated at an oblique angle, and the peak position of the covariance between the speckle patterns observed in the far field with the two wavelengths reveals the wavelength change.

A spectral resolution of 100 Mhz is argued to be achievable.

Language: English
Year: 2015
Pages: 3264-3267
ISSN: 15394794 and 01469592
Types: Journal article
DOI: 10.1364/OL.40.003264
ORCIDs: Chakrabarti, Maumita , Jakobsen, Michael Linde and Hanson, Steen Grüner
Keywords

Speckle Spectrometers Spectroscopy Statistical optics

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