National Science Council

Chih-Hua Yang

Way-Seen Wang

Ruei-Chang Lu

Yu-Pin Liao

Shung-Jung Lin

Rei-Shin Cheng

This is a fabrication process for Y-branch nickel/zinc-indiffused polarization splitters on lithium niobate. The fabrication technology needs only two nickel/zinc indiffusions; one at a high temperature and the other at a lower temperature. Nickel/zinc-indiffused waveguides can support single-ordinary, single-extraordinary, and random polarization waves depending on the fabrication process parameters. High extinction ratios can be achieved due to the inherent single-polarization of the waveguides. The splitting ratios of the TE and TM modes are sufficiently high for practical applications.

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Taipei, Taiwan

Chih-Hua Yang