Design, Fabrication and Characterization of Inverse Adiabatic Fiber-To-Chip Couplers

, , , , , ,

Keywords: , ,

In silicon photonics, light sources are typically located off-chip and connected to the chip with optical fibers. The problem of efficient coupling between the fiber and a submicron waveguide is challenging because the mode areas can differ by up to three orders of magnitude. In this work, we demonstrate that it is possible to use a high index multimode waveguide with its lowest order mode matched to the fiber mode, which increases the range of materials usable for the coupler waveguide significantly. An inverse-taper coupler between a fiber and a SiNx-waveguide overclad with silicon oxide was fabricated. 1dB loss was measured for a 750µm-long device with a low-index multimode waveguide designed to match a 4.0µm fiber.

PDF of paper:

Journal: TechConnect Briefs
Volume: 2, Nanotechnology 2011: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational
Published: June 13, 2011
Pages: 310 - 313
Industry sectors: Advanced Materials & Manufacturing | Sensors, MEMS, Electronics
Topic: MEMS & NEMS Devices, Modeling & Applications
ISBN: 978-1-4398-7139-3