An LiNbO3 waveguide SHG device for blue light generation by first order quasiphase-matching was fabricated using the electron-beam scanning domain inversion technique for the first time. The period of the domain-inverted grating was 3 μm and blue light of wavelength 0.44μm was obtained. The normalised SHG efficiency was 70%/W.
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Fujimura et al. (1992) studied this question.
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