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Updated: May 28, 2026

Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems
Published on: February 10, 2020
Stimulated Raman scattering using a single femtosecond oscillator with flexibility for imaging and spectral
Hope T Beier1, Gary D Noojin, Benjamin A Rockwell
1U. S. Air Force Research Laboratory, 4141 Petroleum Drive, Fort Sam Houston, TX 78234, USA. hopebeier@gmail.com
Abstract:
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.
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