Opto-electronic systems for addressing Ru oxygen sensors: their design optimization and calibration process
Opto-electronic systems for addressing Ru oxygen sensors: their design optimization and calibration process
The paper describes research at Southampton University, aimed at optimising the design of fibre-remoted dissolved-oxygen sensors, using immobilized fluorescent Ru2+ indicators. The design and construction of two types of fluorescence lifetime monitoring units, one type using phase-delay-monitoring and the other using photon counting, is described. Results from a detailed theoretical study of a photon-counting RLD fluorescence lifetime sensor are presented, with specific attention to noise aspects. By numerical modeling of an analytical solution, the optimum time-window boundaries for the photon-counting system are identified. A surprising result is that the signal/noise can actually be improved by not using photon counts from all of the exponential decay, but leaving a time-gap in the measurement improves lifetime accuracy. Our previously reported Ti3+-doped sapphire fluorescence-lifetime calibration probe is described, and a new method for RLD interrogator verification using the probe is demonstrated.
Austin, E.A.
49244605-390e-4a67-a184-58434ba30e7c
Dakin, J.P.
04891b9b-5fb5-4245-879e-9e7361adf904
2001
Austin, E.A.
49244605-390e-4a67-a184-58434ba30e7c
Dakin, J.P.
04891b9b-5fb5-4245-879e-9e7361adf904
Austin, E.A. and Dakin, J.P.
(2001)
Opto-electronic systems for addressing Ru oxygen sensors: their design optimization and calibration process.
SPIE 2001, Boston, USA.
30 Oct 2001.
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Conference or Workshop Item
(Paper)
Abstract
The paper describes research at Southampton University, aimed at optimising the design of fibre-remoted dissolved-oxygen sensors, using immobilized fluorescent Ru2+ indicators. The design and construction of two types of fluorescence lifetime monitoring units, one type using phase-delay-monitoring and the other using photon counting, is described. Results from a detailed theoretical study of a photon-counting RLD fluorescence lifetime sensor are presented, with specific attention to noise aspects. By numerical modeling of an analytical solution, the optimum time-window boundaries for the photon-counting system are identified. A surprising result is that the signal/noise can actually be improved by not using photon counts from all of the exponential decay, but leaving a time-gap in the measurement improves lifetime accuracy. Our previously reported Ti3+-doped sapphire fluorescence-lifetime calibration probe is described, and a new method for RLD interrogator verification using the probe is demonstrated.
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Published date: 2001
Additional Information:
4578-06 (Invited)
Venue - Dates:
SPIE 2001, Boston, USA, 2001-10-30 - 2001-10-30
Identifiers
Local EPrints ID: 17115
URI: http://eprints.soton.ac.uk/id/eprint/17115
PURE UUID: 7960aeb1-4189-40e1-a894-1642484df883
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Date deposited: 15 Sep 2005
Last modified: 15 Mar 2024 05:54
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Contributors
Author:
E.A. Austin
Author:
J.P. Dakin
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