Air Gap Fiber Fabry–Pérot Interferometer for Highly Sensitive Micro-Airflow Sensing
| Autor: | Hsin-Jung Hsieh, Zi-Yu Weng, Cheng-Ling Lee, Wan-Yu Hong |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Materials science
Optical fiber business.industry Airflow Fluid mechanics Interference (wave propagation) Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Interferometry Wavelength Optics law Optoelectronics Electrical and Electronic Engineering Air gap (plumbing) business Fabry–Pérot interferometer |
| Zdroj: | IEEE Photonics Technology Letters. 23:905-907 |
| ISSN: | 1941-0174 1041-1135 |
| DOI: | 10.1109/lpt.2011.2142413 |
| Popis: | This work presents a novel sensor based on an air-gap fiber Fabry-Perot interferometer (AG-FFPI) to identify an extremely low airflow velocity. When a micro airflow flows through the upper side of the sensor, an extremely small pressure difference caused by fluid mechanics makes two fiber endfaces tilt upwards and generates a tiny discrepancy between the two aligned fiber endfaces. This discrepancy of the AG-FFPI changes the air gap, and the center wavelength of the specific interference dips. The proposed sensor can determine the velocity of a micro airflow from a surrounding environment within 0 ~ 1.2 m/s. In addition, the wavelength of shifts in interference fringes is nearly proportional to airflow velocity with a high sensitivity of approximately +33.17 nm/(m · s-1). |
| Databáze: | OpenAIRE |
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