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28 July 1994 Modified double ion-exchange method for the fabrication of phase gratings in glass waveguides
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We demonstrate improvements to the double ion-exchange process proposed for the fabrication of synthetic diffractive optical elements in glass waveguides. In this process a potassium slab waveguide is first fabricated. Then the diffractive element is made with silver ion exchange. In the modified process a short silver ion exchange is used in the second process step and the double ion-exchanged waveguide remains single mode. The undesired undiffracted light can be nearly totally eliminated. The mode profile of the potassium and double ion-exchanged waveguides are very close to each other resulting in low coupling loss between these two waveguide regions.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jyrki Saarinen, Seppo Honkanen, Guang-Wen Zhang, and S. Iraj Najafi "Modified double ion-exchange method for the fabrication of phase gratings in glass waveguides", Proc. SPIE 2213, Nanofabrication Technologies and Device Integration, (28 July 1994);


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