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2 January 1998 Optical filter utilizing a sharp wavelength response of the directional coupler composed of the K+- and AG+ -ion exchange waveguides
Kiyoshi Kishioka, K. Yamamoto
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Proceedings Volume 3211, International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '96; (1998) https://doi.org/10.1117/12.345528
Event: International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '96, 1996, Madras, India
Abstract
This paper describes a new pass-band optical filter utilizing a sharp wavelength-selective power-transfer occurring in the directional coupler composed of the K+- and Ag+-ion exchange waveguides. The wavelength- selective power-transfer is achieved by greatly different dispersion relations caused by the large mismatch in the index profile between the ion-exchange waveguides forming the directional coupler. A narrow pass-band width of about 7 nm is measured in the filter fabricated in the soda-lime glass substrate. The fabrication technique with two-step ion-exchange of the K+ and Ag+ ions, is also described.
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Kiyoshi Kishioka and K. Yamamoto "Optical filter utilizing a sharp wavelength response of the directional coupler composed of the K+- and AG+ -ion exchange waveguides", Proc. SPIE 3211, International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '96, (2 January 1998); https://doi.org/10.1117/12.345528
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KEYWORDS
Directional couplers
Optical filters
Waveguides
Dispersion
Fabrication
Ions
Soda-lime glass
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