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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 8 — Apr. 16, 2007
  • pp: 4848–4856

Fiber laser-based light source for coherent anti-Stokes Raman scattering microspectroscopy

Esben Ravn Andresen, Carsten Krogh Nielsen, Jan Thøgersen, and Søren Rud Keiding  »View Author Affiliations

Optics Express, Vol. 15, Issue 8, pp. 4848-4856 (2007)

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We demonstrate an alternative light source for CARS microspectroscopy based on a fiber laser and a photonic-crystal fiber. The light source simultaneously delivers a near-transform-limited picosecond pump pulse at 1033.5 nm and a frequency-shifted, near-transform-limited femtosecond Stokes pulse, tunable from 1033.5 nm to 1400 nm. This corresponds to a range 0 - 2500 cm-1, so that Raman-active vibrations in this frequency range can be probed. The spectral resolution is 5 cm-1, given by the spectral width of the pump pulse. The frequency range that can be probed simultaneously is 200 cm-1-wide, given by the spectral width of the Stokes pulse. The achievable average powers are 50 mW for the pump and 2 mW for the Stokes pulse. The repetition rate is 35 MHz. We demonstrate the capability of this light source by performing CARS microspectroscopy and comparing CARS spectra with Raman spectra.

© 2007 Optical Society of America

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(180.5810) Microscopy : Scanning microscopy
(300.6230) Spectroscopy : Spectroscopy, coherent anti-Stokes Raman scattering

ToC Category:
Lasers and Laser Optics

Original Manuscript: February 27, 2007
Revised Manuscript: March 30, 2007
Manuscript Accepted: April 3, 2007
Published: April 6, 2007

Virtual Issues
Vol. 2, Iss. 5 Virtual Journal for Biomedical Optics

Esben R. Andresen, Carsten K. Nielsen, Jan Thøgersen, and Søren R. Keiding, "Fiber laser-based light source for coherent anti-Stokes Raman scattering microspectroscopy," Opt. Express 15, 4848-4856 (2007)

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