Optical wave guides

Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...

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501 37, G02B 616, C03C 1304

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049366505

ABSTRACT:
Glass fibre suitable for use as the core in fibre lasers and/or amplifiers has a core which consists of a continuous glass phase and a dispersed phase of crystallites. The preferred crystallites are the oxides and phosphates of rare earth metals, e.g. Nd.sub.2 O.sub.3 and NdP.sub.5 O.sub.14. The small size concentration and distribution of the crystallites keeps the attenuation down to acceptable levels.

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