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.
%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
}