Abstract

We report the numerical analysis and the fabrication of a reversed-ridge PLZT film waveguide. It is single-mode, has low transmission loss, and has large transverse cross-section suitable for efficient coupling to single-mode optical fibers. We used this structure to fabricate Mach-Zehnder (MZ) waveguide modulators. The field distribution in the channel and Y branch waveguides was calculated using a beam propagation method to analyze the modal profiles and the propagation loss. The reversed-ridge waveguides and the MZ structures were fabricated on r-sapphire substrates with a patterned ITO spacer film by sol-gel deposition. At 1.55 m the propagation loss was 2.7 dB/cm. In the MZ, the half-wave modulation voltage was 8.5 V using 1.55m light and electrode length of 3.5 mm.

[IEEE ]

PLZT thin-film waveguides

Takao Kawaguchi, Hideaki Adachi, Kentaro Setsune, Osamu Yamazaki, and Kiyotaka Wasa
Appl. Opt. 23(13) 2187-2191 (1984)

Phase-polarization ensemble modulation effect of a BaTiO₃ crystal film waveguide on Mach–Zehnder interferometer electrooptic intensity modulators

Na Sun and DeGui Sun
Appl. Opt. 61(8) 1851-1855 (2022)

Low-loss channel waveguides and Y-splitter formed by ion-exchange in silica-on-silicon

Zian He, Yigang Li, Yingfeng Li, Yanwu Zhang, Liying Liu, and Lei Xu
Opt. Express 16(5) 3172-3177 (2008)

Demonstration of electrooptic modulation at 2165nm using a silicon Mach-Zehnder interferometer

Mackenzie A. Van Camp, Solomon Assefa, Douglas M. Gill, Tymon Barwicz, Steven M. Shank, Philip M. Rice, Teya Topuria, and William M. J. Green
Opt. Express 20(27) 28009-28016 (2012)

Single-Crystal Electrooptic Thin-Film Waveguide Modulators for Infrared Laser Systems

James F. Lotspeich
Appl. Opt. 13(11) 2529-2539 (1974)