Glass integrated optic wavelength filter utilizing an ion-exchange waveguide/multimode overlay structure

Iain S. Mauchline; George Stewart

doi:10.1117/12.141902

6 April 1993 Glass integrated optic wavelength filter utilizing an ion-exchange waveguide/multimode overlay structure

Iain S. Mauchline, George Stewart

Author Affiliations +

Proceedings Volume 1794, Integrated Optical Circuits II; (1993) https://doi.org/10.1117/12.141902
Event: Fibers '92, 1992, Boston, MA, United States

Abstract

A novel integrated optic filtering element exhibiting a comb filter response has been achieved based on the coupling between an ion exchange waveguide to individual higher order modes of a multimoded overlay film. A K⁺/Na⁺ exchanged guide is fabricated in BK7 optical quality glass and designed to be singled moded over the 1 micrometers to 1.6 micrometers operating range, a calcium fluoride buffer region is then deposited before a high index film of zinc sulphide is evaporated onto the structure. Several devices have been fabricated to investigate the effects of varying the thickness of the overlay and that of the buffer layer. The notch widths observed to date range from 8 nm to 50 nm with channel spacings ranging between 150 nm and 220 nm; these coupled wavelengths agree well with the theoretical predictions.

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Iain S. Mauchline and George Stewart "Glass integrated optic wavelength filter utilizing an ion-exchange waveguide/multimode overlay structure", Proc. SPIE 1794, Integrated Optical Circuits II, (6 April 1993); https://doi.org/10.1117/12.141902

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