@article{4939f2ee980644dfb6078a41d66f514d,
title = "Femtosecond laser point-by-point Bragg grating inscription in BDK-doped step-index PMMA optical fibers",
abstract = "In this paper, the inscription of 2-mm-long fiber Bragg gratings (FBGs) on benzyl dimethyl ketal (BDK)-doped poly(methyl methacrylate) (PMMA) optical fibers by means of a femtosecond laser and a point-by-point FBG inscription technique is reported. The highest reflectivity of approximately 99\% is obtained with a pulse energy of 68.5 nJ, showing a large refractive index modulation amplitude of 7.2 × 10−4. Afterwards, grating stabilities at room and higher temperatures of up to 80°C are investigated.",
author = "Xuehao Hu and Zhen Chen and Xin Cheng and Rui Min and Hang Qu and Christophe Caucheteur and Hwayaw Tam",
note = "Funding Information: Funding. 2020 Li Ka Shing Foundation Cross-Disciplinary Research Grant (2020LKSFG01B, 2020LKSFG14B); Specialized Project Fund in Science and Technology of Guangdong Province (2019ST096, 2019ST135); Special projects in key fields of colleges and universities in Guangdong Province (2020ZDZX3035, 2020ZDZX3037); The Start-up fund from Shantou University (NTF18016, NTF19023); National Natural Science Foundation of China (62003046); International Science and Technology Cooperation Programme (BZ2019063, BZ2020030, BZ2020045). Funding Information: C. Caucheteur is supported by the F.R.S.-FNRS. Publisher Copyright: {\textcopyright} 2022 Optica Publishing Group",
year = "2022",
month = jan,
day = "15",
doi = "10.1364/OL.450047",
language = "English",
volume = "47",
pages = "249--252",
journal = "Optics Letters",
issn = "0146-9592",
publisher = "Optica Publishing Group (formerly OSA)",
number = "2",
}