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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 33 — Nov. 20, 2010
  • pp: 6385–6390

Characterization of time-resolved fluorescence response measurements for distributed optical-fiber sensing

Elena Sinchenko, W. E. Keith Gibbs, Claire E. Davis, and Paul R. Stoddart  »View Author Affiliations


Applied Optics, Vol. 49, Issue 33, pp. 6385-6390 (2010)
http://dx.doi.org/10.1364/AO.49.006385


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Abstract

A distributed optical-fiber sensing system based on pulsed excitation and time-gated photon counting has been used to locate a fluorescent region along the fiber. The complex Alq 3 and the infrared dye IR-125 were examined with 405 and 780 nm excitation, respectively. A model to characterize the response of the distributed fluorescence sensor to a Gaussian input pulse was developed and tested. Analysis of the Alq 3 fluorescent response confirmed the validity of the model and enabled the fluorescence lifetime to be determined. The intrinsic lifetime obtained ( 18.2 ± 0.9 ns ) is in good agreement with published data. The decay rate was found to be proportional to concentration, which is indicative of collisional deactivation. The model allows the spatial resolution of a distributed sensing system to be improved for fluorophores with lifetimes that are longer than the resolution of the sensing system.

© 2010 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence
(120.4825) Instrumentation, measurement, and metrology : Optical time domain reflectometry

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: July 29, 2010
Revised Manuscript: October 11, 2010
Manuscript Accepted: October 12, 2010
Published: November 10, 2010

Citation
Elena Sinchenko, W. E. Keith Gibbs, Claire E. Davis, and Paul R. Stoddart, "Characterization of time-resolved fluorescence response measurements for distributed optical-fiber sensing," Appl. Opt. 49, 6385-6390 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-33-6385

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