1 February 1992 Theoretical model for a thin cylindrical film optical fiber fluorosensor
Author Affiliations +
The behavior of the power efficiency, Peff, of an optical fiber with a thin-film source distributed in the core/cladding interlace is analyzed. The expressions derived make use of the exact field solution of a cylindrical fiber, whereas previous work has made use of the weakly guiding approximation. Although more complicated and harder to interpret, the formulas presented allow the analysis of the power injection efficiency of fibers with arbitrary differences in indices of refraction. The results obtained are relevant to the design of more efficient optical fiber fluorosensors. In this work, some results using the weakly guiding approximation were confirmed. However, in contrast to the weakly guiding work, we have found that Peft does not always increase with the V number. It was found that Peff always increases with the difference in the indices of refraction, ncore - nclad, and varies only slightly with the wavelength, λ, and the fiber core radius, a. Finally, by varying a and λ in such a way as to make their ratio, a/λ, constant, it was found that Peff is also constant. This indicates that a/λ is a new independent variable.
Claudio Oliveira Egalon, Claudio Oliveira Egalon, Robert S. Rogowski, Robert S. Rogowski, } "Theoretical model for a thin cylindrical film optical fiber fluorosensor," Optical Engineering 31(2), (1 February 1992). https://doi.org/10.1117/12.56079 . Submission:


Excitation efficiency of an optical fiber core source
Proceedings of SPIE (September 30 1991)
Modeling an evanescent field absorption optical fiber sensor
Proceedings of SPIE (September 28 1995)
Model of a thin-film optical fiber fluorosensor
Proceedings of SPIE (February 28 1991)

Back to Top