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Image quality improved 1X8 multimode interference coupler
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Paper Abstract

A novel design of multimode interference coupler with deeply etched air trenches at the boundary of the multimode section is proposed for photonic integrated circuitry on low-index-contrast materials. The device length decreases from 820 microns to 750 microns for a 1X8 polymer multimode interference coupler. Due to the enhanced optical confinement, the optimized coupler with air trenches experimentally achieved 0.28/0.23dB reduced insertion loss, 2.16/2.34dB improved contrast ratio for TE and TM polarization, compared with conventional multimode interference coupler. The device entirely covers the wavelength range of both C-band and L-band, which is sufficient for broad band communication.

Paper Details

Date Published: 2 March 2007
PDF: 8 pages
Proc. SPIE 6475, Integrated Optics: Devices, Materials, and Technologies XI, 64751C (2 March 2007); doi: 10.1117/12.706291
Show Author Affiliations
Xiaolong Wang, Univ. of Texas, Austin (United States)
Ray T. Chen, Univ. of Texas, Austin (United States)

Published in SPIE Proceedings Vol. 6475:
Integrated Optics: Devices, Materials, and Technologies XI
Yakov Sidorin; Christoph A. Waechter, Editor(s)

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