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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 18 — Aug. 27, 2012
  • pp: 20156–20169

Multicore fiber with integrated fiber Bragg gratings for background-free Raman sensing

Sebastian Dochow, Ines Latka, Martin Becker, Ron Spittel, Jens Kobelke, Kay Schuster, Albrecht Graf, Sven Brückner, Sonja Unger, Manfred Rothhardt, Benjamin Dietzek, Christoph Krafft, and Jürgen Popp  »View Author Affiliations

Optics Express, Vol. 20, Issue 18, pp. 20156-20169 (2012)

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In the last years a variety of fiber optic Raman probes emerged, which are only partly suited for in vivo applications. The in vivo capability is often limited by the bulkiness of the probes. The size is associated with the required filtering of the probes, which is necessary due to Raman scattering inside the fibers. We employed in-line fiber Bragg gratings (FBG) as notch filter for the collection path and integrated them in a novel type of Raman probe. Multicore singlemode fibers (MCSMF) were designed and drawn integrating 19 singlemode cores to achieve better collection efficiency. A Raman probe was assembled with one excitation fiber and six MCSMF with inscribed FBGs as collection fibers. The probe was characterized regarding Raman background suppression, collection efficiency, and distance dependence. First Raman measurements on brain tissue are presented.

© 2012 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(170.3890) Medical optics and biotechnology : Medical optics instrumentation
(170.5660) Medical optics and biotechnology : Raman spectroscopy
(290.5860) Scattering : Scattering, Raman
(300.6330) Spectroscopy : Spectroscopy, inelastic scattering including Raman
(300.6450) Spectroscopy : Spectroscopy, Raman
(280.1415) Remote sensing and sensors : Biological sensing and sensors
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: June 26, 2012
Revised Manuscript: August 3, 2012
Manuscript Accepted: August 3, 2012
Published: August 20, 2012

Virtual Issues
Vol. 7, Iss. 10 Virtual Journal for Biomedical Optics

Sebastian Dochow, Ines Latka, Martin Becker, Ron Spittel, Jens Kobelke, Kay Schuster, Albrecht Graf, Sven Brückner, Sonja Unger, Manfred Rothhardt, Benjamin Dietzek, Christoph Krafft, and Jürgen Popp, "Multicore fiber with integrated fiber Bragg gratings for background-free Raman sensing," Opt. Express 20, 20156-20169 (2012)

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