Tunable Microcavities In Photonic Bandgap Yarns and Optical Fibers - Benoit, Gilles
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The vision behind this work is the fabrication of high performance innovative fiber-based optical components over kilometer length-scales. Their optical properties derive from their multilayer dielectric photonic band-gap structure that exhibits omnidirectional reflectivity. The theoretical tools needed to design, analyze and optimize such structures are introduced. We show that defect layers in these otherwise periodic structures act as micro-cavities that enable precise design of the fibers' spectral response. Two structures are explored: fibers for external reflection and hollow- core…mehr

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Produktbeschreibung
The vision behind this work is the fabrication of high performance innovative fiber-based optical components over kilometer length-scales. Their optical properties derive from their multilayer dielectric photonic band-gap structure that exhibits omnidirectional reflectivity. The theoretical tools needed to design, analyze and optimize such structures are introduced. We show that defect layers in these otherwise periodic structures act as micro-cavities that enable precise design of the fibers' spectral response. Two structures are explored: fibers for external reflection and hollow- core transmission fibers. We demonstrate that the resonance wavelength of Fabry-Perot cavities embedded in reflecting fibers can be tuned reversibly under applied elastic strain or external illumination at 514 nm. Experimental data is compared to computed data based on opto-mechanical and photodarkening models. We then show that optical micro-cavities in transmission fibers can induce significant group-velocity dispersion as a result of modal interactions. Applications for these fibers and future research directions are envisioned.
Autorenporträt
Gilles Benoit graduated from the Ecole Nationale Superieure des Mines de Nancy with a Master of Science in 2001 and obtained a PhD from the Massachusetts Institute of Technology in 2006. His research has primarily focused on magnetic superlattices and on 1D photonic bandgap fibers and devices. He is author of multiple publications and patents.