학술논문
Hot-wire anemometer using cobalt-doped fiber based grating Fabry-Perot interferometer
Document Type
Conference
Author
Source
2023 21st International Conference on Optical Communications and Networks (ICOCN) Optical Communications and Networks (ICOCN), 2023 21st International Conference on. :1-3 Jul, 2023
Subject
Language
ISSN
2771-3059
Abstract
An optically-heated hot-wire anemometer using a cobalt-doped fiber based grating Fabry-Perot interferometer (FPI) is proposed. The 800 $\mu \mathrm{m}$-long cobalt-doped fiber sandwiched between two fiber Bragg gratings absorbs the heating laser and increases the cavity length of the FPI due to temperature increase. Its temperature drops with airflow velocity that shifts the fringe wavelength of the FPI. Experimental results show a measurement range of 0-4 m/s with a sensitivity of -867 pm/(m/s) at airflow velocity of 0.1 m/s.