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21 June 1988 Fiber-Optic Chemical Sensors Based On Energy Transfer
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Proceedings Volume 0906, Optical Fibers in Medicine III; (1988)
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States
The development of energy transfer based fiber-optic sensors provides a new approach to optical sensing and offers greater flexibility in the choice of analyte specific dyes. We have successfully constructed a physiological pH fiber-optic chemical sensor based on energy transfer from a pH insensitive fluorophore, eosin, to a pH sensitive absorber, phenol red. As the pH increases, phenol red's absorption increases in the spectral region that overlaps with the emission spectrum of eosin. Since the extent of energy transfer is proportional to the spectral overlap integral, the amount of energy transfer increases as the pH increases resulting in a diminished fluorescence intensity. Our present efforts are aimed at preparing pH sensitive dyes based on intramolecular energy transfer. Since the energy transfer efficiency is inversely proportional to the sixth power of the distance between the donor and acceptor, the small intramolecular distance should lead to very efficient energy transfer. Several types of intramolecular systems are being investigated.
© (1988) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ping Yuan, D. Jordan, F. P. Milanovich, and David R. Walt "Fiber-Optic Chemical Sensors Based On Energy Transfer", Proc. SPIE 0906, Optical Fibers in Medicine III, (21 June 1988);

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