Low loss silicon microring resonator as comb filter

Scattering loss caused by roughness of waveguide sidewalls is a key problem for long circumference microring based applications, such as comb filters. This paper presents a Si microring resonator incorporated with the multimode waveguide and single-mode waveguide, which suppresses the unwanted reson...

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Bibliographic Details
Published inOptics communications Vol. 355; pp. 285 - 289
Main Authors Deng, Qingzhong, Yi, Huaxiang, Long, Qifeng, Wang, Xingjun, Zhou, Zhiping
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.11.2015
Subjects
Multimode waveguide
Optical resonator
Scattering loss
Wavelength filtering devices
Optical resonator
Multimode waveguide
Wavelength filtering devices
Scattering loss
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Summary:Scattering loss caused by roughness of waveguide sidewalls is a key problem for long circumference microring based applications, such as comb filters. This paper presents a Si microring resonator incorporated with the multimode waveguide and single-mode waveguide, which suppresses the unwanted resonance of high-order modes while allowing the fundamental mode resonance with low loss. Both numerical and experimental results proved that the proposed solution is capable to achieve ~88.5% scattering loss reduction which is promising for narrow channel spacing comb filters.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2015.06.060