Wavelength trimming of a microring resonator filter by means of aUV sensitive polymer overlay |
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| Authors: | Chu S.T. Pan W. Sato S. Kaneko T. Little B.E. Kokubun Y. |
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| Affiliation: | Microphotonics Project, Kanagawa Acad. of Sci. & Technol., Kawasaki; |
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| Abstract: | Trimming of the resonant wavelength of a vertically coupled glass microring resonator channel dropping filter with a photo-induced refractive index change in a dip coated polymer overlay is reported. In this letter, the glass microring resonator has a radius of 19 μm, a free-spectral range of 10 nm, and a Q value of 800. The maximum wavelength shift observed is 9 nm, which is yielded through an absolute bulk index change in the polymer of 0.044. Trimming is a continuous function of exposure time and dose |
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