Improvements in or Relating to Photonic Crystal Fibres

Philip Russell (Inventor), Tim Birks (Inventor), Jonathan Knight (Inventor), Brian Mangan (Inventor)

Research output: Patent

Abstract

A photonic crystal fibre comprising a bulk material having an arrangement of longitudinal holes, the fibre including a cladding region and a guiding core (280), the cladding region having an effective-refractive-index which varies across the fibre's cross section, wherein, in use, the effective-refractive-index variation causes light propagating in the fibre to have a different transverse profile from the profile that it would have if the cladding region were of a substantially uniform effective refractive index.; A photonic crystal fibre comprises a bulk material having an arrangement of longitudinal holes, the fibre including a cladding region and a guiding core (280), the cladding region having an effective-refractive-index which varies across the fibre's cross section. The core may confine a first mode while the refractive index gradient of the cladding may confine a pump beam. The hole structure has been chosen to provide the guiding core and/or the refractive index gradient.
Original languageEnglish
Patent numberWO0142829A2
IPCC03B37/012
Priority date10/12/99
Filing date11/12/00
Publication statusPublished - 14 Jun 2001

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