Wide-bandwidth, low-waveguide-width-sensitivity InP-based multimode interference coupler designed by wavefront matching method

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Takeshi Fujisawa, Tsutomu Kitoh, Kei Watanabe, Kenya Suzuki, Masaki Kotoku, Hiroshi Takahashi

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Keywords: photonic integrated circuit, MMI coupler, wavefront matching method

JOURNAL FREE ACCESS

2011 Volume 8 Issue 24 Pages 2100-2105

DOI https://doi.org/10.1587/elex.8.2100

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Abstract

A wavefront matching design method is successfully applied to a high-index-contrast InP waveguide for the first time. Fabricated 2×2MMI coupler exhibits a 1.6 times wider operation wavelength range than a conventional MMI coupler. This coupler has less waveguide-width sensitivity and is suitable for InP-based large-scale photonic integrated circuits.

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