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Large core, multimode, chalcogenide glass fibre coupler by side-polishing |
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| Authors: | Giorgos S Athanasiou Elżbieta Bereś-Pawlik Grzegorz Semczuk David Furniss Angela B Seddon Trevor M Benson |
| Institution: | 1. George Green Institute for Electromagnetics Research, University of Nottingham, Nottingham, NG7 2RD, UK 2. Novel Photonics Glasses Group, University of Nottingham, Nottingham, NG7 2RD, UK 3. Wroclaw University of Technology, Wroclaw, Poland |
| Abstract: | A novel method for obtaining a multimode optical coupler in chalcogenide glass fibre is described. The fibres used had a large $\text{ Ge }_{17}\text{ As }_{18}\text{ Se }_{65}$ Ge 17 As 18 Se 65 core comprising about 74 % of the total cross-sectional area with an optical cladding of $\text{ Ge }_{17}\text{ As }_{18}\text{ Se }_{62}\text{ S }_{3}$ Ge 17 As 18 Se 62 S 3 . A single arc-shaped U-groove was formed in each of two silicate glass blocks. A length of fibre was embedded into each groove and glued in place. The centre of each fibre length was subsequently side-polished. Finally two such embedded fibres were glued together in close contact to form the coupler, whilst monitoring the coupling ratio at the output. |
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