Optical and Quantum Electronics

, Volume 25, Issue 8, pp 517–525

Analysis of electrooptically induced waveguides in strontium barium niobate and optical modulators

  • Ning Hua Zhu
  • Zi Qian Wang
Paper

DOI: 10.1007/BF00308307

Cite this article as:
Zhu, N.H. & Wang, Z.Q. Opt Quant Electron (1993) 25: 517. doi:10.1007/BF00308307

Abstract

An electrooptically induced optical waveguide can be formed by applying a DC voltage between electrodes fabricated on the surface of a crystal with strong electrooptic coefficients (for example, strontium barium niobate). Calculations of the refractive index profile and the optical mode size for such waveguides are presented. Approximate solutions for the fundamental mode are used to analyse the power coupling between a single-mode step-profile fibre and these waveguides. The power transmission losses in the straight and S-shaped waveguides are estimated by using a finite-difference beam propagation method (FD-BPM). The calculations predict that a new kind of modulator/switch can be realized with the induced waveguides. The important characteristics of these devices are discussed and compared with LiNbO3 optical waveguide modulators.

Copyright information

© Chapman & Hall 1993

Authors and Affiliations

  • Ning Hua Zhu
    • 1
  • Zi Qian Wang
    • 1
  1. 1.Electronics Department of Zhongshan (Sun Yat-Sen) UniversityGuangzhou, GuangdongP.R. China

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