Quasi-Phase-Matched Second Harmonic Generation in a LiTaO3 Waveguide

Kazuhisa Yamamoto; Kiminori Mizuuchi; Tetsuo Taniuchi

doi:10.1109/3.144483

Quasi-Phase-Matched Second Harmonic Generation in a LiTaO₃ Waveguide

Kazuhisa Yamamoto, Kiminori Mizuuchi, Tetsuo Taniuchi

Advanced Interdisciplinary Research Division

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

We report third-order quasi-phase-matched (QPM) second harmonic generation (SHG) in a LiTaO₃ channel waveguide. A deep domain-inverted region is first fabricated by a proton-exchange and heat treatment technique. Then a uniform and low-loss channel waveguide is fabricated by pyrophosphoric acid proton exchange. Consequently, 12 mW of blue light is obtained at 424 nm wavelength with a conversion efficiency of 6%. The observed FWHM temperature acceptance width for SHG power is 3.2°C and FWHM wavelength acceptance bandwidth for that is 0.2 nm. It is also shown that diffraction limited focusing of the generated blue light may be obtained.

Original language	English
Pages (from-to)	1909-1914
Number of pages	6
Journal	IEEE Journal of Quantum Electronics
Volume	28
Issue number	9
DOIs	https://doi.org/10.1109/3.144483
Publication status	Published - 1992 Jan 1

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

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title = "Quasi-Phase-Matched Second Harmonic Generation in a LiTaO3 Waveguide",

abstract = "We report third-order quasi-phase-matched (QPM) second harmonic generation (SHG) in a LiTaO3 channel waveguide. A deep domain-inverted region is first fabricated by a proton-exchange and heat treatment technique. Then a uniform and low-loss channel waveguide is fabricated by pyrophosphoric acid proton exchange. Consequently, 12 mW of blue light is obtained at 424 nm wavelength with a conversion efficiency of 6%. The observed FWHM temperature acceptance width for SHG power is 3.2°C and FWHM wavelength acceptance bandwidth for that is 0.2 nm. It is also shown that diffraction limited focusing of the generated blue light may be obtained.",

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