Abstract
A high-temperature resistant fiber Bragg grating (FBG) with pronounced cladding modes is fabricated using a simple, fast, and flexible point-by-point femtosecond laser inscription. Cladding modes of different orders exhibit various sensitivities to changes in refractive index of the surrounding medium and temperature, while the Bragg wavelength is only dependent on the ambient temperature. By combining the resonance of cladding modes and the Bragg resonance, measurement of variations of temperature and surrounding refractive index can be achieved. Survivability of the cladding modes and the core mode in the fabricated FBG at elevated temperatures up to 1000°C is demonstrated.
Recommended Citation
C. Zhu et al., "High-Temperature Stable FBGs Fabricated by a Point-By-Point Femtosecond Laser Inscription for Multi-Parameter Sensing," OSA Continuum, vol. 4, no. 2, pp. 355 - 363, Optical Society of America (OSA), Feb 2021.
The definitive version is available at https://doi.org/10.1364/OSAC.415685
Department(s)
Electrical and Computer Engineering
Research Center/Lab(s)
Intelligent Systems Center
International Standard Serial Number (ISSN)
2578-7519
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2021 Optical Society of America (OSA), All rights reserved.
Publication Date
15 Feb 2021
Comments
Research was sponsored by the Leonard Wood Institute in cooperation with the U.S. Army Research Laboratory and was accomplished under Cooperative Agreement Number W911NF-14-2-0034.