Applications of Solid-Core Photonic BandGap Fibres to Laser Systems and Nonlinear Effects Generation

Dr Vincent Pureur

Institut FEMTO-ST, Département d'Optique P. M. Duffieux, Université de Franche-Comté, France

3:30 pm Monday, 28 March 2011, EN101 Lecture Theatre (EN Building), Hawthorn.

This talk focuses on both theoretical and experimental studies of Solid-Core Photonic BandGap Fibres (SC-PBGF), for which the PBG originates from the 2D periodical arrangement of weak refractive index inclusions in the cladding. After giving these fibres advantages and underlining a first Bismuth doped fibre laser, we present their applications in laser systems thanks to the conception and the characterization of an Ytterbium doped PBGF with a transverse single-mode laser emission around 977 nm. The design of a SC-PBG fibre for phase-matched frequency doubling or tripling for all-fibre systems is also highlighted. 
In the second part, the application of SC-PGBF to nonlinear effects generation is discussed. Nonlinear spectral broadening of femtosecond pulses propagating in such PBG fibres is investigated and we show efficient energy transfer across high attenuation between adjacent bandgaps. By exploiting their strong frequency dependent dispersion when compared to index guiding micro-structured fibres, we highlight the design of SC-PBGF to fulfill group index matching conditions between the first ejected optical soliton and the trapped dispersive wave generated in the blue/visible wavelength range.

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