Patent ID: 6816659
Filing Date: 2004-11-09
Classification: C03B,G02B,G02F,H04B

Abstract:
A unit comprising:a portion of holey optical fibre having a length Lc comprising a core region and a cladding region, said cladding region comprising, in turn, a plurality of holes passing through it longitudinally and arranged so as to lower a refractive index of the cladding region with respect to a refractive index of the core region in a way to induce guided propagation by the core region, said holes having a respective diameter and being spaced, two by two, according to a respective pitch; and a temperature adjusting device for bringing and maintaining the portion of holey optical fibre at temperature values T selectable in an interval of temperatures Tx-Ty, the interval being predetermined based on at least the diameter and the pitch.