Abstract
In recent years, the coating of fiber Bragg gratings (FBGs) with a specific material has opened up the possibility to broaden the limits of applicability of this technology. Diamond has a set of properties that makes it an attractive candidate to protect the optical fiber against chemically harsh environments, whose sensing is also a great challenge. One of the most used techniques to obtain these coatings is through the hot filament chemical vapor deposition (HFCVD); in this process, the temperature reaches, typically, around 850°C–900°C. In this work, the regeneration of a seed FBG during its coating with a nanocrystalline diamond thin film through the HFCVD process is presented. Simultaneously, the thermal monitoring of the process was also performed using the same grating. The resistance test in a corrosive medium reveals an improvement on the durability of the sensing properties of the diamond-coated FBG compared with an uncoated FBG, foreseeing a vast range of applications.
© 2017 Optical Society of America
Full Article | PDF ArticleMore Like This
Kai Lu, Hangzhou Yang, Kok-Sing Lim, Harith Ahmad, Pan Zhang, Qin Tian, Xiangzi Ding, and Xueguang Qiao
Appl. Opt. 57(24) 6971-6975 (2018)
Mert Celikin, David Barba, Binod Bastola, Andreas Ruediger, and Federico Rosei
Opt. Express 24(19) 21897-21909 (2016)
Xinpu Zhang, Liyang Shao, Haijun He, Wei Pan, and Lianshan Yan
Appl. Opt. 56(22) 6201-6205 (2017)