文献类型：期刊文献

英文题名：Programmable multi-wavelength distributed feedback laser array integrated in a liquid crystal polymer waveguide

作者：Wang, Zhaoyi[1];Sun, Peizhi[1,2];Yuan, Conglong[1,3];Luo, Duanbin[1];Shen, Ning[1,2];Hu, Honglong[1,3];Cheng, Hongbo[1];Zheng, Zhi-gang[1,2]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：49

期号：20

起止页码：5707

外文期刊名：OPTICS LETTERS

收录：;EI(收录号：20244217209460);WOS:【SCI-EXPANDED(收录号:WOS:001354505300009)】；

基金：National Key Research and Development Program of China (2022YFA1203700) ; National Natural Science Foundation of China (22305079, 61822504, 62035008, 62275081) ; Innovation Program of Shanghai Municipal Education Commission, Scientific Committee of Shanghai (2021-01-07-00-02-E00107) ; "Shuguang Program" of Shanghai Education Development Foundation, Shanghai Municipal Education Commission (21SG29) ; Shanghai Sailing Program (23YF1409000) ; Postdoctoral Fellowship Program of CPSF (GZB20240218) .

语种：英文

外文关键词：Continuous wave lasers - Elastomers - Gas dynamic lasers - Ionomers - Laser applications - Liquid lasers - Nematic liquid crystals - Photonic integration technology - Wavelength division multiplexing

摘要：Liquid crystal (LC) distributed feedback (DFB) lasers hold significant potential for integrated photonics applications. However, limitations in wavelength spacing for wavelength switching, device size, and compatibility with other technologies have impeded advancements of the LC DFB laser in integration and responsiveness. Herein, we propose a thin-film multi-wavelength DFB laser array utilizing high- resolution patterned programmable nematic LC polymers, enabling rapid switching with high-resolution wavelength spacing between wavelength division multiplexing channels while maintaining a stable single longitudinal mode (SLM) for each laser. The underlying physical mechanism involves modulating the effective refractive index of the DFB laser by varying the LC molecules' orientation angles between adjacent regions of the LC grating to achieve wavelength modulation. Additionally, a specialized LC waveguide design connects the DFB lasers, facilitating wavelength modulation as well as straight-line and bending propagation of the laser. Furthermore, the laser array demonstrates a relatively low energy threshold, facilitating its applications in high-integration scenarios. (c) 2024 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.