Table of Contents
Advances in Optical Technologies
Volume 2012, Article ID 383212, 8 pages
Research Article

-Cut LiNb Optical Modulators Using Gap-Embedded Patch-Antennas for Wireless-Over-Fiber Systems

1Division of Advanced Electronics and Optical Science, Department of Systems Innovation, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan
2Lightwave Device Laboratory, Photonic Network Research Institute, National Institute of Information and Communications Technology, 4-2-1 Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan

Received 15 July 2012; Accepted 17 September 2012

Academic Editor: Borja Vidal

Copyright © 2012 Yusuf Nur Wijayanto et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We propose an -cut LiNbO3 optical modulator using gap-embedded patch-antennas for wireless-over-fiber systems. The proposed device is composed of an array of narrow-gap-embedded patch-antennas and an optical waveguide located at the center of the gap without a buffer layer. The modulation efficiency of the proposed -cut LiNbO3 optical modulators was enhanced by 6 dB compared to the -cut LiTaO3-based devices.