Title :
Temperature insensitive vertically coupled microring resonator add/drop filters by means of a polymer overlay
Author :
Chu, Sai T. ; Pan, Wugen ; Suzuki, Shuichi ; Little, Brent E. ; Sato, Shinya ; Kokubun, Yasuo
Author_Institution :
Kanagawa Acad. of Sci. & Technol., Kawasaki, Japan
Abstract :
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.
Keywords :
band-pass filters; integrated optics; micro-optics; optical filters; optical glass; optical polymers; optical resonators; optical transmitters; refractive index; wavelength division multiplexing; 25 to 55 C; PMMA-TFMA polymer; air-clad microring resonator filter; microring resonator; microring resonator add/drop filters; operation range; overlay; passband; polymer overlay; refractive index temperature gradient; temperature dependence; temperature insensitive vertically coupled microring resonator add/drop filters; vertically coupled glass microring resonator add/drop filters; Glass; Optical filters; Optical resonators; Optical ring resonators; Optical waveguides; Passband; Polymers; Resonator filters; Temperature dependence; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
