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All normal dispersion nonlinear fibre supercontinuum source characterization and application in hyperspectral stimulated Raman scattering microscopy

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Joly,  Nicolas
Russell Division, Max Planck Institute for the Science of Light, Max Planck Society;
University of Erlangen-Nürnberg, IZNF, Dept Phys;

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Citation

Abdolghader, P., Pegoraro, A. F., Joly, N., Ridsdale, A., Lausten, R., Legare, F., et al. (2020). All normal dispersion nonlinear fibre supercontinuum source characterization and application in hyperspectral stimulated Raman scattering microscopy. Optics Express, 28(24), 35997-36008. doi:10.1364/OE.404977.


Cite as: https://hdl.handle.net/21.11116/0000-0008-D9C2-8
Abstract
Hyperspectral stimulated Raman scattering (SRS) microscopy is a powerful label-free, chemical-specific technique for biomedical and mineralogical imaging. Usually, broad and rapid spectral scanning across Raman bands is required for species identification. In many implementations, however, the Raman spectral scan speed is limited by the need to tune source laser wavelengths. Alternatively, a broadband supercontinuum source can be considered. In SRS microscopy, however, source noise is critically important, precluding many spectral broadening schemes. Here we show that a supercontinuum light source based on all normal dispersion (ANDi) fibres provides a stable broadband output with very low incremental source noise. We characterized the noise power spectral density of the ANDi fibre output and demonstrated its use in hyperspectral SRS microscopy applications. This confirms the viability and ease of implementation of ANDi fibre sources tier broadband SRS imaging. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement