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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 26 — Dec. 24, 2007
  • pp: 17681–17689

Optical probe based on double-clad optical fiber for fluorescence spectroscopy

Ling Wang, Hae Young Choi, Yongmin Jung, Byeong Ha Lee, and Kwang-Taek Kim  »View Author Affiliations


Optics Express, Vol. 15, Issue 26, pp. 17681-17689 (2007)
http://dx.doi.org/10.1364/OE.15.017681


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Abstract

We report an optical probe based on a single double-clad fiber (DCF), which is suitable for fluorescence spectroscopy. The excitation light is delivered through the small diameter core of the DCF and the excited fluorescence light is collected by the large diameter inner cladding of the same fiber. To retrieve the signal beam from the inner cladding, we utilize a DCF coupler that couples only the light beams in the inner claddings of two different pieces of DCF. It was found that the separation of the channel for the excited beam from the channel for the excitation beam in the same piece of fiber could diminish the autofluorescence background noise generated by the fiber itself, while maintaining all the benefits of a single-fiber probe system. The usefulness of the DCF probe and the performance of the DCF coupler are then reported by presenting the fluorescence spectrum of a fresh gingko leaf and comparing it with the spectrum taken with conventional methods. The fabrication process of the DCF fiber and the inner cladding mode coupler for it are also presented.

© 2007 Optical Society of America

OCIS Codes
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(170.6280) Medical optics and biotechnology : Spectroscopy, fluorescence and luminescence

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: October 4, 2007
Revised Manuscript: November 20, 2007
Manuscript Accepted: November 20, 2007
Published: December 12, 2007

Virtual Issues
Vol. 3, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Ling Wang, Hae Young Choi, Yongmin Jung, Byeong Ha Lee, and Kwang-Taek Kim, "Optical probe based on double-clad optical fiber for fluorescence spectroscopy," Opt. Express 15, 17681-17689 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-26-17681


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