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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
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.
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Dakin, J.P.
490d5873-c444-423b-8d83-c49f118dc4b5
Austin, E.A.
5e62fbb2-313b-4368-a371-2d8cb7978109
Dakin, J.P.
490d5873-c444-423b-8d83-c49f118dc4b5

Austin, E.A. and Dakin, J.P. (2001) Opto-electronic systems for addressing Ru oxygen sensors: their design optimization and calibration process. SPIE 2001. 30 Oct 2001.

Record type: 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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More information

Published date: 2001
Additional Information: 4578-06 (Invited)
Venue - Dates: SPIE 2001, 2001-10-30 - 2001-10-30

Identifiers

Local EPrints ID: 17115
URI: https://eprints.soton.ac.uk/id/eprint/17115
PURE UUID: 7960aeb1-4189-40e1-a894-1642484df883

Catalogue record

Date deposited: 15 Sep 2005
Last modified: 15 Jul 2019 19:30

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