13 March 2015 High optical coupling efficiency quasi-vertical taper for polymer waveguide devices
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Proceedings Volume 9368, Optical Interconnects XV; 936808 (2015) https://doi.org/10.1117/12.2078560
Event: SPIE OPTO, 2015, San Francisco, California, United States
Abstract
Quasi-Vertical tapers are designed to enable high coupling efficiency from a conventional single mode fiber into a single mode polymer rib waveguide. A triangular region fabricated under the single mode waveguide is adopted to adiabatically transform the fiber mode into the polymer rib waveguide mode. This structure works as an optical mode transformer. Because the trenches are deeper at the facets than at the active regions of the waveguide, the waveguide mode size in vertical direction becomes larger at the facets and can better match the input and output fiber mode. A coupling efficiency of 82.95% is achievable with a tip width of 1 μm.
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Zeyu Pan, Zeyu Pan, Harish Subbaraman, Harish Subbaraman, Yi Zou, Yi Zou, Xingyu Zhang, Xingyu Zhang, Cheng Zhang, Cheng Zhang, Qiaochu Li, Qiaochu Li, L. Jay Guo, L. Jay Guo, Ray T. Chen, Ray T. Chen, } "High optical coupling efficiency quasi-vertical taper for polymer waveguide devices", Proc. SPIE 9368, Optical Interconnects XV, 936808 (13 March 2015); doi: 10.1117/12.2078560; https://doi.org/10.1117/12.2078560
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