“Photonic Crystal Fibers for Advanced Photonics Devices”
Thursday, July 29, 2010 / 11:00-12:00pm
Photonic crystal fibers have enabled light to be controlled in ways not previously possible or even imaginable with conventional optical fibers.
The cladding of photonic crystal fibers is a two-dimensional pattern of tiny holes in the glass around the core, which trap light within the core itself. The structured nature of the cladding allows great control of the fiber properties such as dispersion, nonlinearity and number of supported modes. Arguably one of the most impressive effects that can be achieved in silica-air photonic crystal fibers is that they can confine light with low loss in an air core. Unlike standard fibers that guide light by total internal reflection, in hollow-core photonic crystal fibers light is confined and guided by a photonic bandgap that prohibits the propagation of light in the cladding region under certain conditions. Fibers in which light travels in air down a hollow-core hold great promise for a next generation of optical fibers with performance enhanced in many ways. Latest advances on the fabrication of hollow-core photonic crystal fibers with significantly improved optical performance will be presented in this talk. We will also discuss basic features and recent developments in controlling nonlinearity and dispersion using hollow-core photonic crystal fibers, with application in ultrashort pulse compression and transmission. Results showing the use of hollow-core fibers for re-compression of chirped pulsed, adiabatic soliton compression in tapered fibers and soliton pulse delivery of powerful ultrashort pulses will be presented. Finally, novel ways of generating, manipulating and transmitting light in photonic crystal fibers, and future research directions on photonic crystal fibers for applications in advanced photonic devices will be discussed.
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Martin C. Richardson