Three-Dimensional Cross-Coupled Silicon Nitride Racetrack Resonator-Based Tunable Optical Filter

A tunable three-dimensional silicon nitride racetrack resonator was experimentally demonstrated, with a microring resonator on a bottom layer and a feedback cross-coupled waveguide on a top layer. At a 1559.3-nm wavelength, an extinction ratio of more than 14 dB and free spectral range of 2.7 nm can...

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Bibliographic Details
Published inIEEE photonics technology letters Vol. 29; no. 9; pp. 771 - 774
Main Authors Jijun Feng, Akimoto, Ryoichi, Qiang Hao, Heping Zeng
Format Journal Article
LanguageEnglish
Published New York IEEE 01.05.2017
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Couplings
Extinction ratio
integrated optics
Optical device fabrication
Optical feedback
Optical filters
Optical resonators
Optical waveguides
Resonator filters
Silicon nitride
waveguide couplers
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Summary:A tunable three-dimensional silicon nitride racetrack resonator was experimentally demonstrated, with a microring resonator on a bottom layer and a feedback cross-coupled waveguide on a top layer. At a 1559.3-nm wavelength, an extinction ratio of more than 14 dB and free spectral range of 2.7 nm can be realized with a quality factor of about 1.88 x 10 4 . The filter performance, such as the resonance wavelength and extinction ratio, can be thermo-optically tuned based on the electrical control of a heater above the feedback waveguide. The presented device has a potential to be applied as a tunable modulator/switch as well as a highly sensitive sensor.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2017.2685430