Ultra-compact multilayer Si/SiO2 GRIN lens mode-size converter for coupling single-mode fiber to Si-wire waveguide

Ter Hoe Loh*, Qian Wang, Jie Zhu, Keh Ting Ng, Yi Cheng Lai, Yingyan Huang, Seng Tiong Ho

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

We report on the fabrication and experimental demonstration of optical mode size transformation between standard single-mode fiber and 0.26μm-thick Si-waveguide by 12μm-thick Si/SiO2 multilayer on-chip GRIN lens of lengths 16μm or 24μm butt-joint to 10μm-wide terminated Siwaveguide. The overall coupling loss of the coupler was measured to be 3.45dB in which the Fresnel reflection loss is estimated to be 2dB at the GRIN-lens/air interface. The on-chip integrated GRIN lens opens up the feasibility of a low cost passive aligned fiber-pigtailed electronic-photonics integrated circuits platform.

Original languageEnglish (US)
Pages (from-to)21519-21533
Number of pages15
JournalOptics Express
Volume18
Issue number21
DOIs
StatePublished - Oct 11 2010

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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