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Characteristic of a Broadband Ti:LiNbO3, Optical Modulator with Buried Electrodes and Etched Grooves in the Buffer Layer
Fiber and Integrated Optics
  • Jinyang Hu, Tsinghua University
  • Boyu Wu, Tsinghua University
  • Xiaomin Jin, Tsinghua University
Publication Date
1-1-1997
Abstract

Traveling wave Ti:LiNbO3 Mach-Zehnder optical modulators with buried electrodes and etched grooves in the SiO2 buffer layer are analyzed by the finite element method. The tradeoff between the bandwidth BW and the half-wave voltage Vπ is discussed. The value of BW/Vπ is used to weight the total performance of the modulator. Taking a thick buffer layer and etching deep grooves in the buffer layer are demonstrated as two effective methods to improve the performance of the modulator. A 3-dB optical bandwidth of 18 GHz with half-wave voltage 5V at a wavelength of 1.55 pm could be obtained even though the electrode is not very thick. When the requirement of half-wave voltage is not very critical, a bandwidth of more than 100 GHz can be obtained.

Citation Information
Jinyang Hu, Boyu Wu and Xiaomin Jin. "Characteristic of a Broadband Ti:LiNbO3, Optical Modulator with Buried Electrodes and Etched Grooves in the Buffer Layer" Fiber and Integrated Optics Vol. 16 Iss. 3 (1997) p. 269 - 276
Available at: http://works.bepress.com/xjin/20/