Biopolar-voltage-controlled optical switch fabricated on Z-cut Ti. LiNbO3 intersecting waveguides

Hirochika Nakajima*, Ippei Sawaki, Minoru Seino, Takashi Yamane

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A new optical switch is proposed in which attention is paid to the behavior of the guided wave at the crossing of an intersecting waveguide. Design and fabrication of an optimal configuration were carried out at a wavelength of 1.3 μm. For the analysis of the operating mechanism and the optimum design, a waveguide analysis method based on the Fourier transform has been used. By means of the electrodes formed via a buffer layer on a Z-cut Ti:LiNbO3, a bipolar optical switch was fabricated in which switching is possible in both the positive and negative polarities. This switch has a low loss and low crosstalk if the intersection length is short. If the device length is increased for reduction of the operating voltage, other characteristics are degraded.

Original languageEnglish
Pages (from-to)12-19
Number of pages8
JournalElectronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi)
Issue number4
Publication statusPublished - 1989 Apr
Externally publishedYes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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