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Optical Engineering

Sol-gel-derived 4×4 multimode interference coupler: optimization and fabrication
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Paper Abstract

The design and fabrication of a 4×4 multimode interference (MMI) coupler is reported. A photopatternable organic-inorganic sol-gel on silica-on-silicon is adopted for the device fabrication. Optimization of waveguide parameters led to the coupler excess loss below 1 dB and power imbalance below 0.2 dB. An optical 90-deg hybrid based on the coupler is realized and tested. The experimental data are in very good agreement with predicted simulation results, demonstrating the simplicity and exactness of the sol-gel method as an advantageous fabrication route in integrated optics.

Paper Details

Date Published: 1 March 2004
PDF: 5 pages
Opt. Eng. 43(3) doi: 10.1117/1.1646180
Published in: Optical Engineering Volume 43, Issue 3
Show Author Affiliations
Oleg V. Mishechkin, Northrop Grumman Space Technology (United States)
Mahmoud Fallahi, Optical Sciences Ctr./Univ. of Arizona (United States)


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