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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 13 — Dec. 2, 2009

Fiber-format CARS spectroscopy by spectral compression of femtosecond pulses from a single laser oscillator

Marco Marangoni, Alessio Gambetta, Cristian Manzoni, Vikas Kumar, Roberta Ramponi, and Giulio Cerullo  »View Author Affiliations


Optics Letters, Vol. 34, Issue 21, pp. 3262-3264 (2009)
http://dx.doi.org/10.1364/OL.34.003262


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Abstract

We demonstrate an approach to coherent anti-Stokes Raman scattering (CARS) spectroscopy/microscopy based on spectral compression of femtosecond pulses emitted by a compact Er-fiber oscillator. Spectral compression is achieved by group-velocity mismatched second-harmonic generation in periodically poled nonlinear crystals, and it allows efficient synthesis of synchronized narrow-bandwidth (less than 10 cm 1 ) pump and Stokes pulses with the frequency difference continuously tunable up to 3000 cm 1 . CARS signal enhancement by up to 3 orders of magnitude is obtained by interferometric superposition with a phase-coherent local oscillator field, also synthesized by spectral compression.

© 2009 Optical Society of America

OCIS Codes
(190.5650) Nonlinear optics : Raman effect
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(320.5390) Ultrafast optics : Picosecond phenomena

ToC Category:
Nonlinear Optics

History
Original Manuscript: June 24, 2009
Manuscript Accepted: August 19, 2009
Published: October 19, 2009

Virtual Issues
Vol. 4, Iss. 13 Virtual Journal for Biomedical Optics

Citation
Marco Marangoni, Alessio Gambetta, Cristian Manzoni, Vikas Kumar, Roberta Ramponi, and Giulio Cerullo, "Fiber-format CARS spectroscopy by spectral compression of femtosecond pulses from a single laser oscillator," Opt. Lett. 34, 3262-3264 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-34-21-3262


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