Optimizing the efficiency of a periodically poled LNOI waveguide using in situ monitoring of the ferroelectric domains

Niu, Yunfei; Lin, Chen; Liu, Xiaoyue; Chen, Yan; Hu, Xiaopeng; Zhang, Yong; Cai, Xinlun; Gong, Yan-Xiao; Xie, Zhenda; Zhu, Shining

doi:10.1063/1.5142750

Optimizing the efficiency of a periodically poled LNOI waveguide using in situ monitoring of the ferroelectric domains

Lithium niobate on insulator (LNOI) is a unique platform for integrated photonic applications and especially for high-efficiency nonlinear frequency converters because of the strong optical field confinement. In this work, we fabricated a 6-mm-long periodically poled LNOI ridge waveguide with an …