%0 Journal Article %1 Pearce:05 %A Pearce, G. %A Pottage, J. %A Bird, D. %A Roberts, P. %A Knight, J. %A Russell, P. %D 2005 %I OSA %J Opt. Express %K bandgap fiber fibre high-index hollow-core soft-glass %N 18 %P 6937--6946 %T Hollow-core PCF for guidance in the mid to far infra-red %U http://www.opticsexpress.org/abstract.cfm?URI=oe-13-18-6937 %V 13 %X A major limitation to attaining low-loss single-mode guidance in hollow core photonic crystal fibre (PCF) is surface guided modes that are trapped in the core surround. This is particularly severe when high index (n > 2) glasses are used. By modelling a structure that has the characteristic features of a realistic fibre we show that, by tuning the thickness of the core wall, the influence of these �??surface�?? modes can be minimised. For a refractive index of 2.4 we predict power-in-air fractions of over 95% over a fractional bandwidth of ~ 5%, peaking at over 98%. The designs are appropriate for mid- to far-IR PCFs for which suitable glasses (e.g., tellurites and chalcogenides) have high refractive indices.

@article{Pearce:05, abstract = {A major limitation to attaining low-loss single-mode guidance in hollow core photonic crystal fibre (PCF) is surface guided modes that are trapped in the core surround. This is particularly severe when high index (n > 2) glasses are used. By modelling a structure that has the characteristic features of a realistic fibre we show that, by tuning the thickness of the core wall, the influence of these �??surface�?? modes can be minimised. For a refractive index of 2.4 we predict power-in-air fractions of over 95% over a fractional bandwidth of ~ 5%, peaking at over 98%. The designs are appropriate for mid- to far-IR PCFs for which suitable glasses (e.g., tellurites and chalcogenides) have high refractive indices.}, added-at = {2009-06-24T06:57:29.000+0200}, author = {Pearce, G. and Pottage, J. and Bird, D. and Roberts, P. and Knight, J. and Russell, P.}, biburl = {https://www.bibsonomy.org/bibtex/2011fd8b91ab878e16302f18035cd4820/krisrowland}, description = {Optics InfoBase: Optics Express - Hollow-core PCF for guidance in the mid to far infra-red}, interhash = {8980cb546f3af3f506f58eb835ffd5f2}, intrahash = {011fd8b91ab878e16302f18035cd4820}, journal = {Opt. Express}, keywords = {bandgap fiber fibre high-index hollow-core soft-glass}, number = 18, pages = {6937--6946}, publisher = {OSA}, timestamp = {2009-06-24T06:57:29.000+0200}, title = {Hollow-core PCF for guidance in the mid to far infra-red}, url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-13-18-6937}, volume = 13, year = 2005 }