Laser-optical fiber Bragg grating anemometer for measuring gas flows: application to measuring the electric wind

Lamb, David; Hooper, A.W.

doi:10.1364/ol.31.001035

Cited by 16 publications

(11 citation statements)

References 4 publications

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“…Compared with passive fiber grating sensors, laser controlled fiber grating sensors have some enhanced features like controllable sensitivity, responsivity, and dynamic range to enable measurement in large temperature range [15][16][17]. D. W. Lamb et al proposed a low-cost FBG anemometer externally heated by using a CO 2 laser for measuring gas flow in the high-voltage environment (corona discharge) [18]. However, such sensor may be too bulky for some industrial applications.…”

Section: Introductionmentioning

confidence: 99%

All-optical fiber anemometer based on laser heated fiber Bragg gratings

et al. 2011

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A fiber-optic anemometer based on fiber Bragg gratings (FBGs) is presented. A short section of cobalt-doped fiber was utilized to make a fiber-based "hot wire" for wind speed measurement. Fiber Bragg gratings (FBGs) were fabricated in the cobalt-doped fiber using 193 nm laser pulses to serve as localized temperature sensors. A miniature all-optical fiber anemometer is constructed by using two FBGs to determine the dynamic thermal equilibrium between the laser heating and air flow cooling through monitoring the FBGs' central wavelengths. It was demonstrated that the sensitivity of the sensor can be adjusted through the power of pump laser or the coating on the FBG. Experimental results reveal that the proposed FBGbased anemometer exhibits very good performance for wind speed measurement. The resolution of the FBG-based anemometer is about 0.012 m/s for wind speed range between 2.0 m/s and 8.0 m/s.

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Section: Introductionmentioning

confidence: 99%

All-optical fiber anemometer based on laser heated fiber Bragg gratings

et al. 2011

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“…For instance, D. W. Lamb et al proposed a low-cost FBG anemometer externally heated by using a CO 2 laser for gas flow measurement in the high-voltage environment (corona discharge) [20]. C. Jewart et al presented a flowmeter based on two cross-mounted FBGs with the thin-silver coating as the heat source after pumping by laser light.…”

Section: All-fiber Bragg Grating Anemometermentioning

confidence: 99%

Advances in optical fiber Bragg grating sensor technologies

et al. 2012

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Abstract:The authors review their recent advances in the development of optical fiber Bragg grating (FBG) sensor technologies. After a brief review of the fiber grating sensors, several newly developed FBG sensors are described. With the continuous development of fiber materials, microstructures and post-processing technologies, FBG sensors are still creative after the first demonstration of permanent gratings thirty years ago.

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“…Therefore, fiber-optic anemometers based on HWA have attracted substantial research interest [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. The most common fiber anemometer based on HWA is the well-known heated fiber Bragg grating (FBG) [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 ]. Other sensing configurations that are based on the HWA mechanism, such as those in the intermodal interferometer [ 12 ] and the Fabry–Pérot interferometer [ 13 ], have been proposed.…”

Section: Introductionmentioning

confidence: 99%

“…The temperature of heated FBGs depends on the velocity of flow of the surroundings, which cools the FBGs, shifting their spectral resonance peaks. To heat the FBG, Lamb et al firstly proposed a heating technique that relies on a remote infrared CO 2 laser beam to heat a small region of the FBG [ 11 ]. The active-heating FBG method is very convenient, but precise alignment of the FBG and laser is required, and the laser is very bulky.…”

Section: Introductionmentioning

confidence: 99%

A Hot-Polymer Fiber Fabry–Perot Interferometer Anemometer for Sensing Airflow

Lee

Liu

Luo

et al. 2017

Sensors

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This work proposes the first hot-polymer fiber Fabry–Perot interferometer (HPFFPI) anemometer for sensing airflow. The proposed HPFFPI is based on a single-mode fiber (SMF) endface that is attached to a UV-cured polymer to form an ultracompact fiber Fabry–Perot microcavity. The proposed polymer microcavity was heated using a low-cost chip resistor with a controllable dc driving power to achieve a desired polymer’s steady-state temperature (T) that exceeds the T of the surrounding environment. The polymer is highly sensitive to variations of T with high repeatability. When the hot polymer was cooled by the measured flowing air, the wavelength fringes of its optical spectra shifted. The HPFFPI anemometers have been experimentally evaluated for different cavity lengths and heating power values. Experimental results demonstrate that the proposed HPFFPI responses well in terms of airflow measurement. A high sensitivity of 1.139 nm/(m/s) and a good resolution of 0.0088 m/s over the 0~2.54 m/s range of airflow were achieved with a cavity length of 10 μm and a heating power of 0.402 W.

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Laser-optical fiber Bragg grating anemometer for measuring gas flows: application to measuring the electric wind

Cited by 16 publications

References 4 publications

All-optical fiber anemometer based on laser heated fiber Bragg gratings

All-optical fiber anemometer based on laser heated fiber Bragg gratings

Advances in optical fiber Bragg grating sensor technologies

A Hot-Polymer Fiber Fabry–Perot Interferometer Anemometer for Sensing Airflow

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