Abstract

Periodically poled lithium niobate (PPLN) structures on a chip enable efficient second-order nonlinear optical effects, benefiting from the tight light confinement and the utilization of d₃₃. Here, we report a broadband second-harmonic (SH) generation in a step-chirped PPLN waveguide on X-cut lithium niobate on insulator (LNOI). The high fidelity of the poling period is demonstrated over the whole length of 7 mm using a non-destructive technique of piezoresponse force microscopy. The SH signal was continuously observed in the step-chirped PPLN waveguides while scanning the wavelength of the pump laser from 1550 nm to 1660 nm. The SH conversion efficiency was measured to be 9.6 % W^-1 cm^-2 at 1642 nm. This work will benefit wavelength conversions of light sources with wideband spectra.

© 2022 Optica Publishing Group

Second-harmonic and cascaded third-harmonic generation in generalized quasiperiodic poled lithium niobate waveguides

Li Zhang, Xiao Wu, Zhenzhong Hao, Rui Ma, Feng Gao, Fang Bo, Guoquan Zhang, and Jingjun Xu
Opt. Lett. 48(7) 1906-1909 (2023)

Efficient and highly tunable second-harmonic generation in Z-cut periodically poled lithium niobate nanowaveguides

Jia-Yang Chen, Chao Tang, Zhao-Hui Ma, Zhan Li, Yong Meng Sua, and Yu-Ping Huang
Opt. Lett. 45(13) 3789-3792 (2020)

Thermally tunable and efficient second-harmonic generation on thin-film lithium niobate with integrated micro-heater

Xiaoyue Liu, Chi Zhang, Ying Pan, Rui Ma, Xian Zhang, Mengwen Chen, Lin Liu, Zhenda Xie, Shining Zhu, Siyuan Yu, and Xinlun Cai
Opt. Lett. 47(19) 4921-4924 (2022)

Highly tunable birefringent phase-matched second-harmonic generation in an angle-cut lithium niobate-on-insulator ridge waveguide

Chuanyi Lu, Yuting Zhang, Jing Qiu, Yongzhi Tang, Tingting Ding, Shijie Liu, Yuanlin Zheng, and Xianfeng Chen
Opt. Lett. 47(5) 1081-1084 (2022)

Low-voltage tunable second-harmonic generation in an x-cut periodically poled lithium niobate waveguide

F. Généreux, G. Baldenberger, B. Bourliaguet, and R. Vallée
Opt. Lett. 32(9) 1108-1110 (2007)