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Proceedings Paper

Multi-wavelength laser sensor surface for high frame rate imaging refractometry (Conference Presentation)
Author(s): Anders Kristensen; Christoph Vannahme; Kristian T. Sørensen; Martin Dufva
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Paper Abstract

A highly sensitive distributed feedback (DFB) dye laser sensor for high frame rate imaging refractometry without moving parts is presented. The laser sensor surface comprises areas of different grating periods. Imaging in two dimensions of space is enabled by analyzing laser light from all areas in parallel with an imaging spectrometer. Refractive index imaging of a 2 mm by 2 mm surface is demonstrated with a spatial resolution of 10 μm, a detection limit of 8 10-6 RIU, and a framerate of 12 Hz, limited by the CCD camera. Label-free imaging of dissolution dynamics is demonstrated.

Paper Details

Date Published: 9 November 2016
PDF: 1 pages
Proc. SPIE 9920, Active Photonic Materials VIII, 992023 (9 November 2016); doi: 10.1117/12.2238109
Show Author Affiliations
Anders Kristensen, DTU Nanotech (Denmark)
Christoph Vannahme, Technical Univ. of Denmark (Denmark)
Kristian T. Sørensen, Technical Univ. of Denmark (Denmark)
Martin Dufva, Technical Univ. of Denmark (Denmark)


Published in SPIE Proceedings Vol. 9920:
Active Photonic Materials VIII
Ganapathi S. Subramania; Stavroula Foteinopoulou, Editor(s)

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