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Optics Express

Optics Express

  • Editor: Micha
  • Vol. 13, Iss. 23 — Nov. 14, 2005
  • pp: 9492–9501

Towards optimum sample-probe-spectrometer system design by adjusting receiving fiber end face position and probe-membrane sample separation

Jianjun Ma, Wojtek J. Bock, Zhiyuan Wang, and Wenhui Hao  »View Author Affiliations

Optics Express, Vol. 13, Issue 23, pp. 9492-9501 (2005)

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A two-fiber probe interrogated by a spectrometer for the measurement of fluorescence emitted from a thin layer of membrane is investigated. For a specific spectrometer, an optimum fiber probe design exists to maximize the sample-probe-spectrometer system performance. In this paper, for the first time, we report that by separating the front end faces of the receiving and illuminating fibers, spectrum resolution and fluorescence collection capability may be simultaneously enhanced. Theoretical and experimental results reveal that such an optimized system collects more emitted rays with incident angles that fall within the full acceptance angle of the slit. The relative collection efficiency increases to 63% when the membrane is positioned very close to the probe tip. By adjusting positions of the receiving fiber and the membrane sample to an optimized combination, we also prove that the optimum performance of spectrometer can be achieved.

© 2005 Optical Society of America

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence

ToC Category:
Research Papers

Original Manuscript: September 6, 2005
Revised Manuscript: October 31, 2005
Published: November 14, 2005

Jianjun Ma, Wojtek Bock, Zhiyuan Wang, and Wenhui Hao, "Towards optimum sample-probe-spectrometer system design by adjusting receiving fiber end face position and probe-membrane sample separation," Opt. Express 13, 9492-9501 (2005)

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