Theoretical study of liquid-immersed exposed-core microstructured optical fibers for sensing.
The absorption and fluorescence sensing properties of liquid-immersed exposed-core microstructured optical fibers are explored for the regime where these structures act as supported nanowires with direct access to the sensing environment. For absorption-based sensing we demonstrate that the amount of power propagating in the sensing region of the exposed-core fiber can compete with that of traditional MOFs. For fluorescence-based sensing, we see that in addition to the enhanced fluorescence capture efficiency already predicted for small-core, high refractive index contrast fibers, an improvement of up to 29% can be gained by using liquid-immersed exposed-core fibers. Additionally, calculation of the losses associated with interfaces between filled and unfilled sections predict significant benefit in using high refractive index substrate glasses for liquid-immersed exposed-core fiber sensing. This work demonstrates that, for fiber dimensions of interest, the exposed-core fiber is an attractive new sensor technology.
Centre of Expertise in Photonics, School of Chemistry & Physics, The University of Adelaide, Adelaide, SA 5005, Australia. stephen.warrensmith@adelaide.edu.au
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D003198:Computer Simulation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008027:Light; D008904:Miniaturization; D008962:Models, Theoretical; D055100:Optical Fibers; D012542:Scattering, Radiation; D012996:Solutions; D014159:Transducers
D012996:Solutions