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Kevin P Chen - One of the best experts on this subject based on the ideXlab platform.

  • fiber optic flow sensors for High Temperature Environment operation up to 800 c
    Optics Letters, 2014
    Co-Authors: Rongzhang Chen, Qingqing Wang, Kevin P Chen
    Abstract:

    This Letter presents an all-optical High-Temperature flow sensor based on hot-wire anemometry. High-attenuation fibers (HAFs) were used as the heating elements. High-Temperature-stable regenerated fiber Bragg gratings were inscribed in HAFs and in standard telecom fibers as Temperature sensors. Using in-fiber light as both the heating power source and the interrogation light source, regenerative fiber Bragg grating sensors were used to gauge the heat transfer from an optically powered heating element induced by the gas flow. Reliable gas flow measurements were demonstrated between 0.066  m/s and 0.66  m/s from the room Temperature to 800°C. This Letter presents a compact, low-cost, and multiflexible approach to measure gas flow for High-Temperature harsh Environments.

  • ultrafast femtosecond laser induced fiber bragg gratings in air hole microstructured fibers for High Temperature pressure sensing
    Optics Letters, 2010
    Co-Authors: Charles Jewart, Qingqing Wang, Dan Grobnic, Stephen J Mihailov, John Canning, Kevin P Chen
    Abstract:

    We present fiber Bragg grating pressure sensors in air-hole microstructured fibers for High-Temperature operation above 800°C. An ultrafast laser was used to inscribe Type II grating in two-hole optical fibers. The fiber Bragg grating resonance wavelength shift and peak splits were studied as a function of external hydrostatic pressure from 15 psito2000 psi. The grating pressure sensor shows stable and reproducible operation above 800°C. We demonstrate a multiplexible pressure sensor technology for a High-Temperature Environment using a single fiber and a single-fiber feedthrough.

  • ultrafast femtosecond laser induced fiber bragg gratings in air hole microstructured fibers for High Temperature pressure sensing
    Optics Letters, 2010
    Co-Authors: Charles Jewart, Qingqing Wang, Dan Grobnic, Stephen J Mihailov, John Canning, Kevin P Chen
    Abstract:

    We present fiber Bragg grating pressure sensors in air-hole microstructured fibers for High-Temperature operation above 800 degrees C. An ultrafast laser was used to inscribe Type II grating in two-hole optical fibers. The fiber Bragg grating resonance wavelength shift and peak splits were studied as a function of external hydrostatic pressure from 15 psi to 2000 psi. The grating pressure sensor shows stable and reproducible operation above 800 degrees C. We demonstrate a multiplexible pressure sensor technology for a High-Temperature Environment using a single fiber and a single-fiber feedthrough.

Qingqing Wang - One of the best experts on this subject based on the ideXlab platform.

  • fiber optic flow sensors for High Temperature Environment operation up to 800 c
    Optics Letters, 2014
    Co-Authors: Rongzhang Chen, Qingqing Wang, Kevin P Chen
    Abstract:

    This Letter presents an all-optical High-Temperature flow sensor based on hot-wire anemometry. High-attenuation fibers (HAFs) were used as the heating elements. High-Temperature-stable regenerated fiber Bragg gratings were inscribed in HAFs and in standard telecom fibers as Temperature sensors. Using in-fiber light as both the heating power source and the interrogation light source, regenerative fiber Bragg grating sensors were used to gauge the heat transfer from an optically powered heating element induced by the gas flow. Reliable gas flow measurements were demonstrated between 0.066  m/s and 0.66  m/s from the room Temperature to 800°C. This Letter presents a compact, low-cost, and multiflexible approach to measure gas flow for High-Temperature harsh Environments.

  • ultrafast femtosecond laser induced fiber bragg gratings in air hole microstructured fibers for High Temperature pressure sensing
    Optics Letters, 2010
    Co-Authors: Charles Jewart, Qingqing Wang, Dan Grobnic, Stephen J Mihailov, John Canning, Kevin P Chen
    Abstract:

    We present fiber Bragg grating pressure sensors in air-hole microstructured fibers for High-Temperature operation above 800°C. An ultrafast laser was used to inscribe Type II grating in two-hole optical fibers. The fiber Bragg grating resonance wavelength shift and peak splits were studied as a function of external hydrostatic pressure from 15 psito2000 psi. The grating pressure sensor shows stable and reproducible operation above 800°C. We demonstrate a multiplexible pressure sensor technology for a High-Temperature Environment using a single fiber and a single-fiber feedthrough.

  • ultrafast femtosecond laser induced fiber bragg gratings in air hole microstructured fibers for High Temperature pressure sensing
    Optics Letters, 2010
    Co-Authors: Charles Jewart, Qingqing Wang, Dan Grobnic, Stephen J Mihailov, John Canning, Kevin P Chen
    Abstract:

    We present fiber Bragg grating pressure sensors in air-hole microstructured fibers for High-Temperature operation above 800 degrees C. An ultrafast laser was used to inscribe Type II grating in two-hole optical fibers. The fiber Bragg grating resonance wavelength shift and peak splits were studied as a function of external hydrostatic pressure from 15 psi to 2000 psi. The grating pressure sensor shows stable and reproducible operation above 800 degrees C. We demonstrate a multiplexible pressure sensor technology for a High-Temperature Environment using a single fiber and a single-fiber feedthrough.

Charles Jewart - One of the best experts on this subject based on the ideXlab platform.

  • ultrafast femtosecond laser induced fiber bragg gratings in air hole microstructured fibers for High Temperature pressure sensing
    Optics Letters, 2010
    Co-Authors: Charles Jewart, Qingqing Wang, Dan Grobnic, Stephen J Mihailov, John Canning, Kevin P Chen
    Abstract:

    We present fiber Bragg grating pressure sensors in air-hole microstructured fibers for High-Temperature operation above 800°C. An ultrafast laser was used to inscribe Type II grating in two-hole optical fibers. The fiber Bragg grating resonance wavelength shift and peak splits were studied as a function of external hydrostatic pressure from 15 psito2000 psi. The grating pressure sensor shows stable and reproducible operation above 800°C. We demonstrate a multiplexible pressure sensor technology for a High-Temperature Environment using a single fiber and a single-fiber feedthrough.

  • ultrafast femtosecond laser induced fiber bragg gratings in air hole microstructured fibers for High Temperature pressure sensing
    Optics Letters, 2010
    Co-Authors: Charles Jewart, Qingqing Wang, Dan Grobnic, Stephen J Mihailov, John Canning, Kevin P Chen
    Abstract:

    We present fiber Bragg grating pressure sensors in air-hole microstructured fibers for High-Temperature operation above 800 degrees C. An ultrafast laser was used to inscribe Type II grating in two-hole optical fibers. The fiber Bragg grating resonance wavelength shift and peak splits were studied as a function of external hydrostatic pressure from 15 psi to 2000 psi. The grating pressure sensor shows stable and reproducible operation above 800 degrees C. We demonstrate a multiplexible pressure sensor technology for a High-Temperature Environment using a single fiber and a single-fiber feedthrough.

Dan Grobnic - One of the best experts on this subject based on the ideXlab platform.

  • ultrafast femtosecond laser induced fiber bragg gratings in air hole microstructured fibers for High Temperature pressure sensing
    Optics Letters, 2010
    Co-Authors: Charles Jewart, Qingqing Wang, Dan Grobnic, Stephen J Mihailov, John Canning, Kevin P Chen
    Abstract:

    We present fiber Bragg grating pressure sensors in air-hole microstructured fibers for High-Temperature operation above 800°C. An ultrafast laser was used to inscribe Type II grating in two-hole optical fibers. The fiber Bragg grating resonance wavelength shift and peak splits were studied as a function of external hydrostatic pressure from 15 psito2000 psi. The grating pressure sensor shows stable and reproducible operation above 800°C. We demonstrate a multiplexible pressure sensor technology for a High-Temperature Environment using a single fiber and a single-fiber feedthrough.

  • ultrafast femtosecond laser induced fiber bragg gratings in air hole microstructured fibers for High Temperature pressure sensing
    Optics Letters, 2010
    Co-Authors: Charles Jewart, Qingqing Wang, Dan Grobnic, Stephen J Mihailov, John Canning, Kevin P Chen
    Abstract:

    We present fiber Bragg grating pressure sensors in air-hole microstructured fibers for High-Temperature operation above 800 degrees C. An ultrafast laser was used to inscribe Type II grating in two-hole optical fibers. The fiber Bragg grating resonance wavelength shift and peak splits were studied as a function of external hydrostatic pressure from 15 psi to 2000 psi. The grating pressure sensor shows stable and reproducible operation above 800 degrees C. We demonstrate a multiplexible pressure sensor technology for a High-Temperature Environment using a single fiber and a single-fiber feedthrough.

  • optical fiber sensor based on retro reflective fiber bragg gratings
    2005
    Co-Authors: Stephen J Mihailov, Dan Grobnic, Christopher W Smelser, Robert B Walker, Ping Lu, Huimin Ding, George Henderson, Xiaoli Dai
    Abstract:

    A retro-reflective sensor for sensing mechanical, chemical or Temperature related information, is disclosed. The sensor is formed of an optical waveguide suitable for use in-situ in a High Temperature Environment having a Bragg grating written into a core region thereof with short-pulsed electromagnetic radiation, said optical waveguide having a glass transition Temperature substantially Higher than that of silica. Preferably the sensor is written into a length of sapphire fiber or within a zirconium waveguide. Preferably the pulse duration of the short pulsed electromagnetic radiation is less than 500 picoseconds.

Stephen J Mihailov - One of the best experts on this subject based on the ideXlab platform.

  • ultrafast femtosecond laser induced fiber bragg gratings in air hole microstructured fibers for High Temperature pressure sensing
    Optics Letters, 2010
    Co-Authors: Charles Jewart, Qingqing Wang, Dan Grobnic, Stephen J Mihailov, John Canning, Kevin P Chen
    Abstract:

    We present fiber Bragg grating pressure sensors in air-hole microstructured fibers for High-Temperature operation above 800°C. An ultrafast laser was used to inscribe Type II grating in two-hole optical fibers. The fiber Bragg grating resonance wavelength shift and peak splits were studied as a function of external hydrostatic pressure from 15 psito2000 psi. The grating pressure sensor shows stable and reproducible operation above 800°C. We demonstrate a multiplexible pressure sensor technology for a High-Temperature Environment using a single fiber and a single-fiber feedthrough.

  • ultrafast femtosecond laser induced fiber bragg gratings in air hole microstructured fibers for High Temperature pressure sensing
    Optics Letters, 2010
    Co-Authors: Charles Jewart, Qingqing Wang, Dan Grobnic, Stephen J Mihailov, John Canning, Kevin P Chen
    Abstract:

    We present fiber Bragg grating pressure sensors in air-hole microstructured fibers for High-Temperature operation above 800 degrees C. An ultrafast laser was used to inscribe Type II grating in two-hole optical fibers. The fiber Bragg grating resonance wavelength shift and peak splits were studied as a function of external hydrostatic pressure from 15 psi to 2000 psi. The grating pressure sensor shows stable and reproducible operation above 800 degrees C. We demonstrate a multiplexible pressure sensor technology for a High-Temperature Environment using a single fiber and a single-fiber feedthrough.

  • optical fiber sensor based on retro reflective fiber bragg gratings
    2005
    Co-Authors: Stephen J Mihailov, Dan Grobnic, Christopher W Smelser, Robert B Walker, Ping Lu, Huimin Ding, George Henderson, Xiaoli Dai
    Abstract:

    A retro-reflective sensor for sensing mechanical, chemical or Temperature related information, is disclosed. The sensor is formed of an optical waveguide suitable for use in-situ in a High Temperature Environment having a Bragg grating written into a core region thereof with short-pulsed electromagnetic radiation, said optical waveguide having a glass transition Temperature substantially Higher than that of silica. Preferably the sensor is written into a length of sapphire fiber or within a zirconium waveguide. Preferably the pulse duration of the short pulsed electromagnetic radiation is less than 500 picoseconds.