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Temperature insensitive vertically coupled microring resonator add/drop filters by means of a polymer overlay

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6 Author(s)
Chu, S.T. ; Kanagawa Acad. of Sci. & Technol., Kawasaki, Japan ; Wugen Pan ; Suzuki, S. ; Little, B.E.
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The temperature dependence of vertically coupled glass microring resonator add/drop filters is investigated. Measurements show that the passband of the air-clad microring resonator filter increases with temperature at a rate of 0.0137 mm//spl deg/C. Using a PMMA-TFMA polymer that has an opposite refractive index temperature gradient than glass as the overlay of the microring resonator, the temperature dependence of the filter is compensated to -0.0025 nm//spl deg/C in the operation range of 25/spl deg/C to 55/spl deg/C.

Published in:

Photonics Technology Letters, IEEE  (Volume:11 ,  Issue: 9 )