Accession Number : ADP008132

Title :   Fabrication of Periodically Reversed Domain Structure for Second-Harmonic-Generation in LiNbO3 by Applying Voltage,

Corporate Author : SONY CORP RESEARCH CENTER YOKOHAMA (JAPAN)

Personal Author(s) : Yamada, M. ; Nada, N. ; Watanabe, K.

Report Date : APR 1992

Pagination or Media Count : 2

Abstract : Recently there has been much interest in quasi-phase-matched(QPM)second harmonic generation (SHG) to obtain coherent blue light in LiNbO3 waveguide. Several techniques for the domain reversal of LiNbO3 have been proposed. By using these techniques, the domain shape is triangle and the domain region has the change in refractive index. This shape is not enough for making a fine and deep periodical domain structure of the QPM-SHG, so the conversion efficiency can not become so high. We had reported that we could succeed to reverse the domain of LiNbO3 by the electron beam bombardment . We have been investigating the mechanism of the domain reversal. We do not know clearly about the mechanism, but we know the charge on the positive c surface of the LiNbO3 substrate is important for the domain reversal. So we conjectured that the domain reversal was caused by the electric field from the charge on the surface.

Descriptors :   *OPTICAL WAVEGUIDES, *FERROELECTRIC DOMAINS, *SYMPOSIA, CONVERSION, ELECTRIC FIELDS, ELECTRON BEAMS, LIGHT, REFRACTIVE INDEX, STRUCTURES, SUBSTRATES, LITHIUM NIOBATES, JAPAN.

Subject Categories : Fiber Optics and Integrated Optics
      Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE