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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 13 — Jun. 20, 2011
  • pp: 12562–12568

Double-clad hollow core photonic crystal fiber for coherent Raman endoscope

Sophie Brustlein, Pascal Berto, Richard Hostein, Patrick Ferrand, Cyrille Billaudeau, Didier Marguet, Alistair Muir, Jonathan Knight, and Hervé Rigneault  »View Author Affiliations

Optics Express, Vol. 19, Issue 13, pp. 12562-12568 (2011)

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Performing label free coherent anti-Stokes Raman scattering (CARS) and stimulated Raman scattering (SRS) in endoscope imaging is a challenge, with huge potential clinical benefit. To date, this goal has remained inaccessible because of the inherent coherent Raman noise that is generated in the fiber itself. By developing double-clad hollow core photonic crystal fiber, we demonstrate coherent anti-Stokes Raman scattering and stimulated Raman scattering in an ‘endoscope-like’ scheme. Both the excitation beams and the collected CARS and SRS signals travel through the same fiber. No CARS and SRS signals are generated within the hollow core fiber even for temporally overlapping pump and Stokes beams, leading to excellent image quality. The CARS and SRS signals generated in the sample are coupled back into a high numerical aperture multimode cladding surrounding the central photonic crystal cladding. We demonstrate this scheme by imaging molecular vibrational bonds of organic crystal deposited on a glass surface.

© 2011 OSA

OCIS Codes
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(300.6230) Spectroscopy : Spectroscopy, coherent anti-Stokes Raman scattering
(180.4315) Microscopy : Nonlinear microscopy
(060.5295) Fiber optics and optical communications : Photonic crystal fibers

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: April 20, 2011
Revised Manuscript: June 7, 2011
Manuscript Accepted: June 7, 2011
Published: June 14, 2011

Virtual Issues
Vol. 6, Iss. 7 Virtual Journal for Biomedical Optics

Sophie Brustlein, Pascal Berto, Richard Hostein, Patrick Ferrand, Cyrille Billaudeau, Didier Marguet, Alistair Muir, Jonathan Knight, and Hervé Rigneault, "Double-clad hollow core photonic crystal fiber for coherent Raman endoscope," Opt. Express 19, 12562-12568 (2011)

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