Two-dimensional periodically poled LiNbO3 nonlinear photonic crystal

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Abstract
A two-dimensional periodically poled lithium niobate crystal with a 13.64 μm period was fabricated. The inverted duty cycle was about 23%. The second harmonic output for the second-order quasi-phase-matching (QPM) against the input was measured. The maximum second harmonic internal conversion efficiency was higher than 40%. All results implied that the second-order QPM could be used to obtain high-frequency conversion efficiency. Compared with the first-order QPM, the second-order QPM can reduce the requirement for the poling technique and the mask fabrication.

Keywords:
two-dimensional /

quasi-phase-matching /

second harmonic generation
Authors and contacts
Ni Pei-Gen,

Ma Bo-Qin,

Cheng Bing-Ying,

Zhang Dao-Zhong

1.
中国科学院物理研究所和凝聚态物理中心光物理实验室,北京 100080
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