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Optimised structure for preparing long ultra-low-loss single-mode fibres |
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| Authors: | Ainslie B.J. Day C.R. Rush J. Beales K.J. |
| Affiliation: | British Telecom Laboratories, Ipswich, UK; |
| Abstract: | An optimised structure has been evolved for producing long lengths of ultra-low-loss single-mode fibre. Attenuation figures of 0.6 dB/km at 1.3 ?m and 0.34 dB/km at 1.6 ?m have been achieved in fibres up to 17.1 km in length. The absorption due to OH impurity has been reduced to <3 dB/km at 1.39 ?m. |
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