LiNbO3 optical switch using asymmetric X-junction waveguide for broadband optical network node

Takuya Sakamaki; Yu Narita; Hiroyuki Tsuda; Shinya Nakajima; Tetsuya Kawanishi

doi:10.1587/elex.7.360

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LiNbO₃ optical switch using asymmetric X-junction waveguide for broadband optical network node

Takuya Sakamaki, Yu Narita, Hiroyuki Tsuda, Shinya Nakajima, Tetsuya Kawanishi

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Keywords: optical switch, LiNbO₃, X-branch

JOURNAL FREE ACCESS

2010 Volume 7 Issue 5 Pages 360-364

DOI https://doi.org/10.1587/elex.7.360

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Abstract

Broadband optical switches are required for a wavelength division multiplexed photonic network node. The wavelength dependency of the LiNbO₃ optical switch characteristics are mainly attributed to the directional coupler section. An asymmetric X-junction was suitable for a broadband optical switch because it has flat spectral response over wide wavelength range and it is easy to fabricate. We have optimized the structure of an asymmetric X-junction and fabricated the 1×2 LiNbO₃ optical switches using it. The optical switch showed broad band characteristics compared to the switch with a directional coupler.

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