Fiber-optic anemometer based on distributed bragg reflector fiber laser technology

Yun Liu, Wei Peng, Xinpu Zhang, Yuzhang Liang, Zhenfeng Gong, Ming Han

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

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 ∼ 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.

Original languageEnglish (US)
Article number6542687
Pages (from-to)1246-1249
Number of pages4
JournalIEEE Photonics Technology Letters
Volume25
Issue number13
DOIs
StatePublished - 2013

Keywords

  • Optical fiber lasers
  • anemometers
  • frequency measurement

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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