Thermal annealing of K+–Na+ ion-exchanged waveguides

Year: 1995

Authors: Giorgetti E., Grando D., Palchetti L., Sottini S.

Autors Affiliation: Istituto di Ricerca sulle Onde Elettromagnetiche, Consiglio Nazionale delle Richerche, Via Panciatichi 64, Firenze, 50127, Italy

Abstract: The process of thermal annealing of K+–Na+ ion-exchanged waveguides in soda lime glass is characterized and compared with a simple theoretical model. The discrepancies between theory and experiments in the case of initially thick guides disappear if the existence of a stress-induced contribution to the refractive index is assumed that is not proportional to the concentration of the doping ions. The results obtained for initially thin guides are exploited for the design of annealed single-mode channel waveguides: 0.4-dB coupling losses with commercial single-mode fibers at ? ­ 1.321 mm were measured.

Journal/Review: OPTICS LETTERS

Volume: 20 (12)      Pages from: 1374  to: 1376

KeyWords: Channel waveguides; Glass
DOI: 10.1364/OL.20.001374

Citations: 8
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