- Fiber-Optic Anemometer Based on Distributed Bragg Reflector Fiber Laser Technology
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- 论文类型： 期刊论文
- 发表时间： 2013-07-01
- 发表刊物： IEEE PHOTONICS TECHNOLOGY LETTERS
- 收录刊物： SCIE、EI、Scopus
- 卷号： 25
- 期号： 13
- 页面范围： 1246-1249
- ISSN号： 1041-1135
- 关键字： Optical fiber lasers; anemometers; frequency measurement
- 摘要： We present a novel fiber-optic anemometer based on a distributed Bragg reflector (DBR) fiber laser. The anemometer consists of a fiber laser pressure sensing element and a Venturi tube designed to convert the wind velocity into differential gas pressure that can be measured by the fiber-laser sensor. A DBR fiber laser that has two polarization modes is designed and fabricated as the major sensing element in this anemometer. The fiber-laser sensor is demodulated by the beat frequency of the two polarization modes, which has higher sensitivity and lower cost over wavelength-demodulated fiber-laser sensors. The experimental results show that the sensor's response to wind velocity is quadratic in the measurement range of 8 similar to 40 m/s, the short term repeatability is better than 0.5%, and its sensitivity is impacted by the power of pump laser. Additionally, this anemometer has the potential capability to be used as a flow meter for both gas and liquid flows.
