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Fiber Bragg grating flow sensors powered by in-fiber light

Cashdollar, LJ and Chen, KP (2005) Fiber Bragg grating flow sensors powered by in-fiber light. IEEE Sensors Journal, 5 (6). 1327 - 1331. ISSN 1530-437X

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Abstract

This paper presents an active fiber Bragg grating temperature and flow sensor based on self-heated optical hot wire anemometry. The grating sensors are directly powered by optical energy carried by optical fibers. In-fiber diode laser light at 910 nm was leaked out from the fiber and absorbed by the surrounding metallic coating to raise the temperature and change the background refractive index distribution of the gratings. When the diode laser is turned off, the grating is used as a temperature sensor. When the diode laser is turned on, the resonance wavelength and spectral width change of the self-heated grating sensor is used to measure the gas flow velocity. The grating flow sensors have been experimentally evaluated for different grating length and input laser power. The grating flow sensors have demonstrated a 0.35- m/s sensitivity for nitrogen flow at atmosphere pressure. © 2005 IEEE.


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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Cashdollar, LJ
Chen, KPpec9@pitt.eduPEC9
Date: 1 December 2005
Date Type: Publication
Journal or Publication Title: IEEE Sensors Journal
Volume: 5
Number: 6
Page Range: 1327 - 1331
DOI or Unique Handle: 10.1109/jsen.2005.855599
Schools and Programs: Swanson School of Engineering > Electrical and Computer Engineering
Refereed: Yes
ISSN: 1530-437X
Date Deposited: 23 Sep 2014 15:56
Last Modified: 03 Feb 2019 04:55
URI: http://d-scholarship.pitt.edu/id/eprint/23037

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