Ti:PPLN 광도파로를 이용한 비선형광학 기반의 의사 위상정합 2차 조화파 발생
Quasi Phase-Matched Second Harmonic-Wave Generation based on Nonlinear-Optic Effect Utilizing Ti:PPLN Optical Waveguides
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초록
고전압 펄스를 인가시켜서 주기적으로 도메인을 반전시키는 공정을 검토하였으며, 이를 적용해서 제작된 Ti 확산 리튬나오베이트 채널광도파로(Ti:PPLN) 기반의 의사 위상정합 2차 조화파 발생을 체계적으로 측정하였다. 2차 조화파 발생을 위해서 16.6 μm 분극 주기와 49 mm 길이의 Ti:PPLN 채널광도파로를 제작하였으며, 473(%/W) 변환효율이 측정되었다.
Abstract
The characteristics of a ferroelectric-domain inverted grating fabricated by applying a high-voltage pulse at room temperature in Ti-diffused channel waveguides in z-cut LiNbO3 (Ti:PPLN) were examined for channel waveguide quasi phase-matched second- harmonic generation devices. The fabrication conditions of uniform periodic domain-inversion were examined. Ti:PPLN with period Λ=16.6 μm for SHG were fabricated and the performances were measured. A normalized SHG efficiency as high as 473 (%/W) was obtained with 49 mm interaction length.
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