Lightwave guide produced from special substrate glasses by ion exchange against CS.sup.+ ions

US5004707A · kind A · utility

Assignee

• Schott Glaswerke · DE

Inventors

• Ludwig Ross · Klein-Winternheim, DE
• Werener Schumann · Mainz, DE

Key dates

• Filing date: Nov 16, 1989
• Grant date: Apr 2, 1991
• Expiry date: Nov 16, 2009

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/1345
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Production of mono- or multimodal lightwave guides from special substrate glasses of the glass system SiO.sub.2 --B.sub.2 O.sub.3 --Al.sub.2 O.sub.3 -- K.sub.2 O--F.sup.-, with partial exchange of the Li.sup.+, Na.sup.+, and/or K.sup.+ ions present in the glass against Cs.sup.+ ions, the substrate glasses having the following compositions (in mol.-%): SiO.sub.2 45-72, B.sub.2 O.sub.3 8-25, Al.sub.2 O.sub.3 1-25, Li.sub.2 O 0-1, Na.sub.2 O 0-2, K.sub.2 O 6-18, MO 0-1 (MO=MgO, CaO, SrO, BaO, ZnO, PbO), in which a portion of the O.sup.- ions present in the glass are replaced by 1-15 mol % F.sup.- ions.