Authors:	D. Taillaert, W. Bogaerts, P. Bienstman, T.F. Krauss, P. Van Daele, I. Moerman, S. Verstuyft, K. De Mesel, R. Baets
Title:	An Out-of-Plane Grating Coupler for Efficient Butt-Coupling Between Compact Planar Waveguides and Single-Mode Fibers
Format:	International Journal
Publication date:	7/2002
Journal/Conference/Book:	IEEE Journal of Quantum Electronics
Volume(Issue):	38(7) p.949-955
DOI:	10.1109/jqe.2002.1017613
Citations:	531 (Dimensions.ai - last update: 14/4/2024) 379 (OpenCitations - last update: 3/5/2024) Look up on Google Scholar
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Abstract

We have designed and fabricated an out-of-plane coupler for butt-coupling from fiber to compact planar waveguides. The coupler is based on a short second-order grating or photonic crystal, etched in a waveguide with a low-index oxide cladding. The coupler is optimized using mode expansion-based simulations. Simulations using a 2-D model show that up to 74% coupling efficiency between single-mode fiber and a 240-nm-thick GaAs-AlOx waveguide is possible. We have measured 19% coupling efficiency on test structures.

Related Research Topics

• Grating-based based vertical fibre coupler (1999-2012)
• CAMFR: an efficient eigenmode expansion tool (1998-2009)
• 2D grating fibre coupler used as polarization splitter (2002-2010)

Related Projects

• IST: PICCO (Photonic Integrated Circuits using photonic Crystal Optics)