Abstract
A photonic crystal fibre including a plurality of longitudinal holes (220), in which at least some of the holes have a different cross-sectional area in a first region (200) of the fibre, that region having been heat-treated after fabrication of the fibre, from their cross-sectional area in a second region of the fibre (190), wherein the optical properties of the fibre in the heat-treated region (200) are altered by virture of the change in cross-sectional area of holes (230) in that region (200).
| Original language | English |
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| Patent number | WO0049435 (A1) |
| IPC | C03B37/012 |
| Priority date | 19/02/99 |
| Publication status | Published - 24 Aug 2000 |