Stimulated Raman scattering using a single femtosecond oscillator with flexibility for imaging and spectral applications

Stimulated Raman scattering (SRS) is a powerful tool for obtaining background-free chemical information about a material without extrinsic labeling. Background-free spectra are particularly important in the fingerprint region (~800 and 1800 cm(-1)) where peaks are narrow, closely-spaced, and may be...

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Bibliographic Details
Published in:Optics express 2011-09, Vol.19 (20), p.18885-18892
Main Authors: Beier, Hope T, Noojin, Gary D, Rockwell, Benjamin A
Format: Article
Language:English
Subjects:
Computer Simulation
Equipment Design
Lasers
Microscopy - methods
Pattern Recognition, Automated - methods
Spectrum Analysis, Raman - instrumentation
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Summary:Stimulated Raman scattering (SRS) is a powerful tool for obtaining background-free chemical information about a material without extrinsic labeling. Background-free spectra are particularly important in the fingerprint region (~800 and 1800 cm(-1)) where peaks are narrow, closely-spaced, and may be in abundance for a particular chemical. We demonstrate a method for obtaining SRS spectra using a single femtosecond laser oscillator. A photonic crystal fiber is used to create a supercontinuum to provide a range of Stokes shifts from ~300 to 3400 cm(-1). This SRS approach provides for collection capabilities that are easily modified between obtaining broadband spectra and single-frequency images.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.19.018885