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 |
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Pages (from-to) | 1909-1914 |
Number of pages | 6 |
Journal | IEEE Journal of Quantum Electronics |
Volume | 28 |
Issue number | 9 |
DOIs | |
Publication status | Published - 1992 Jan 1 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering