Glass for high and flat gain 1.55 .mu.m optical amplifiers

C - Chemistry – Metallurgy – 03 – C

Patent

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Details

C03C 3/247 (2006.01) C03C 3/23 (2006.01) C03C 4/00 (2006.01) C03C 4/12 (2006.01) H01S 3/00 (2006.01) H01S 3/067 (2006.01) H01S 3/17 (2006.01) H04B 10/17 (2006.01) H01S 3/16 (2006.01)

Patent

CA 2297331

The invention relates to a family of erbium-doped fluorophosphate glasses for use in optical signal amplification. The composition, based on 100 parts by weight, is constituted by: P2O5 15-40, A12O3 0-5, MgO 0-9, CaO 0-9, SrO 0-9, BaO 0-45, AlF3 5-25, MgF2 0-10, CaF2 0-25, SrF2 0-25, BaF2 0-20, KHF2 0-2, K2TiF6 0-2, with up to 10 parts by weight of erbium oxide. The glasses according to the present invention exhibit a high gain and a very flat spectrum over the 1550 nm bandwidth, as compared to the glasses of the figure. These glass compositions are particularly well suited for use in fiber or planar optical amplification in WDM and similar applications.

L'invention concerne une famille de verres au flurophosphate dopés à l'erbium destinés à l'amplification de signaux optiques. Cette composition, exprimée en parties, est constituée, pour 100 parties en poids, de 15 à 40 de P¿2?O¿5?, de 0 à 5 d'Al¿2?O¿3?, de 0 à 9 de MgO, de 0 à 9 de CaO, de 0 à 9 de SrO, de 0 à 45 de BaO, de 5 à 25 d'AlF¿3?, de 0 à 10 de MgF¿2?, de 0 à 25 de CaF¿2?, de 0 à 25 de SrF¿2?, de 0 à 20 de BaF¿2?, de 0 à 2 de KHF¿2?, de 0 à 2 de K¿2?TiF¿6? et jusqu'à 10 parties en poids d'oxyde d'erbium. Les verres de l'invention présentent un gain élevé et un spectre très plat dans la largeur de bande des 1550 nm comparé aux verres de la figure. Ces compositions de verre sont particulièrement bien adaptées à l'amplification à fibre optique ou planaire dans le multiplexage en longueur d'onde et dans des applications similaires.

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