Author(s): Ding, TT (Ding, Tingting); Tang, YZ (Tang, Yongzhi); Li, H (Li, Hao); Liu, SJ (Liu, Shijie); Zhang, J (Zhang, Jing); Zheng, YL (Zheng, Yuanlin); Chen, XF (Chen, Xianfeng)

Source: OPTICS LETTERS Volume: 49 Issue: 5  Pages: 1121-1124  DOI: 10.1364/OL.519484  Published Date: 2024 MAR 1 

Abstract: Lithium niobate on insulator (LNOI) holds great potential for frequency conversion, where a variety of highperformance nonlinear devices based on different structures has been demonstrated. Here, we report on second harmonic generation (SHG) in MgO-doped LNOI ridge microwaveguides for efficient green light emission, via an exact type-I noncritical birefringence phase matching (BPM). The LNOI micro-waveguide has a cross section of similar to 3 x 4 mu m2, featuring low coupling loss with lens fiber. The normalized conversion efficiency from a continuous-wave (cw) pump to its second harmonic is measured to be 37%/Wcm2 in a singlepass configuration. The device shows both relatively high efficiency and a void of periodic poling, offering a potential solution for efficient and scalable green light sources and frequency converters. (c) 2024 Optica Publishing Group

Accession Number: WOS:001202759800008

PubMed ID: 38426953

Author Identifiers:

Author Web of Science ResearcherID     ORCID Number

tang, yongzhi       0000-0002-5267-4061

ISSN: 0146-9592

eISSN: 1539-4794