High-temperature stable FBGs fabricated by a point-by-point femtosecond laser inscription for multi-parameter sensing
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 25, 2021
- Source ID
- 10.1364/osac.415685
Entities
People
- Chen Zhu
- Dinesh Alla
- Jie Huang
Organizations
- Leonard Wood Institute
- Missouri University of Science and Technology
- United States Army Research Laboratory
- United States Department of Energy