Showing papers by "Philip St. J. Russell published in 2000"
18 Feb 2000
TL;DR: In this paper, the optical properties of a photonic crystal fiber including a plurality of longitudinal holes are altered by virtue of the change in cross-sectional area of holes in that region.
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).
1,394 citations
TL;DR: In this paper, the fabrication and characterisation of photonic crystal (holey) fibres in which multiple cores are created by filling in selected air-holes with glass is described.
Abstract: The authors report the fabrication and characterisation of photonic crystal (‘holey’) fibres in which multiple cores are created by filling in selected air-holes with glass. The guidance mechanism is modified total internal reflection. Using a tunable diode laser, the inter-core coupling is investigated as a function of air-hole spacing.
154 citations
Patent•
18 Feb 2000
TL;DR: In this paper, the optical properties of a photonic crystal fiber including a plurality of longitudinal holes are altered by virtue of the change in cross-sectional area of holes in that region.
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).
125 citations
TL;DR: In this paper, all-fiber acoustooptic tunable filters (AOTFs) with bandwidth as small as 2.8 nm were fabricated from highly uniform, tapered optical fiber.
Abstract: All-fiber acoustooptic tunable filters (AOTFs) with bandwidth as small as 2.8 nm were fabricated from highly uniform, tapered optical fiber. These filters have typical excess loss of 0.02 dB, greater than 20 dB extinction, are polarization insensitive, and have the smallest bandwidth-length products reported to date.
51 citations
07 May 2000
TL;DR: In this paper, a micro-taper based long-period grating with very narrow bandwidth optical response of 7 nm and extinction > 20 dB was demonstrated, where the wavelength response and bandwidths can be redesigned by choosing appropriate periods and grating lengths.
Abstract: Summary form only given.We have demonstrated a micro-taper based long-period grating with very narrow bandwidth optical response of 7 nm and extinction >20 dB. The wavelength response and bandwidths can be redesigned by choosing appropriate periods and grating lengths.
26 citations
Patent•
17 Aug 2000
TL;DR: A method of manufacturing an optical fibre coupler, comprising the steps of providing a first optical fibre and a second optical fibre, at least one of the fibres being a singlemode fibre, was described in this article, which reduced the local diameter of a region of each of the first and second fibres to produce a tapered waist in each fibre.
Abstract: A method of manufacturing an optical fibre coupler, comprising the steps of providing a first optical fibre and a second optical fibre, at least one of the fibres being a single-mode fibre; reducing the local diameter of a region of each of the first and the second fibres to produce a tapered waist (80) in each fibre; placing the waists (80) of the first and second fibres in contact with each other; and fusing the waists (80) together to form a fused region (70).
6 citations