Enhanced Coupling Strength Gratings for Couplers in III–V Compound Dielectric Waveguides | Zendy

Gary A. Evans | Zendy; Jerome K. Butler | Zendy; Ruo-Hua He | Zendy; Jay B. Kirk | Zendy; Jin Yao | Zendy; Xuezhe Zheng | Zendy; Ashok V. Krishnamoorthy | Zendy

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Enhanced Coupling Strength Gratings for Couplers in III–V Compound Dielectric Waveguides

Author(s) -

Gary A. Evans,

Jerome K. Butler,

Ruo-Hua He,

Jay B. Kirk,

Jin Yao,

Xuezhe Zheng,

Ashok V. Krishnamoorthy

Publication year - 2017

Publication title -

journal of lightwave technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.346

H-Index - 200

eISSN - 1558-2213

pISSN - 0733-8724

DOI - 10.1109/jlt.2017.2651680

Subject(s) - communication, networking and broadcast technologies , photonics and electrooptics

The use of a thin, low-index liner layer over a surface grating covered by a high-index cover layer in a III-V alloy waveguide significantly improves the coupling efficiency of grating couplers, and therefore, reduces the length of such couplers by an order of magnitude. The same low-index liner and high-index cover layer can also reduce losses between transition sections of photonic integrated circuits or between a laser region and a distributed Bragg reflector or grating coupler region.

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