%0 Journal Article %1 pearce %A Pearce, G.J. %A Pottage, J.M. %A Bird, D.M. %A Roberts, P.J. %A Knight, J.C. %A Russell, P.S.J. %D 2005 %J Optics Express %K Fiber_optics div3 fiber_design fiber_fabrication infrared %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?id=85366 %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 similar to 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, 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 similar to 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 = {2007-08-28T10:38:00.000+0200}, author = {Pearce, G.J. and Pottage, J.M. and Bird, D.M. and Roberts, P.J. and Knight, J.C. and Russell, P.S.J.}, biburl = {https://www.bibsonomy.org/bibtex/2c5961e0984de8387e6c08a50a5271d36/div3}, crossref = {http://dx.doi.org/10.1364/OPEX.13.006937}, day = 05, interhash = {8980cb546f3af3f506f58eb835ffd5f2}, intrahash = {c5961e0984de8387e6c08a50a5271d36}, journal = {Optics Express}, keywords = {Fiber_optics div3 fiber_design fiber_fabrication infrared}, month = {09}, number = 18, pages = {6937-6946}, timestamp = {2007-08-28T11:13:18.000+0200}, title = {Hollow-core PCF for guidance in the mid to far infra-red}, url = {http://www.opticsexpress.org/abstract.cfm?id=85366}, volume = 13, year = 2005 }