14 May 2018 High temperature measurement of a low emission, high pressure combustor using femtosecond laser written fiber Bragg gratings
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Abstract
Femtosecond Infrared (fs-IR) laser written fiber Bragg gratings (FBGs), have shown great potential for sensing in extreme environments. This paper presents the fabrication and deployment of two fs-IR laser written FBG temperature probes, for monitoring temperature gradients on the flame tube of a low emission burner, during a high pressure combustor test of an optically accessible combustor rig (OACR).

Results of this work include: contour plots of measured internal and exhaust temperature gradients, contrast of FBG measurements with thermocouple data, discussion of deployment strategies, as well as comments on reliability and other important considerations.
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Robert B. Walker, Robert B. Walker, Sangsig Yun, Sangsig Yun, Manny De Silva, Manny De Silva, Nicholas Charest, Nicholas Charest, Cyril Hnatovsky, Cyril Hnatovsky, Ping Lu, Ping Lu, Doug Robertson, Doug Robertson, Stephen J. Mihailov, Stephen J. Mihailov, Patrizio Vena, Patrizio Vena, } "High temperature measurement of a low emission, high pressure combustor using femtosecond laser written fiber Bragg gratings", Proc. SPIE 10654, Fiber Optic Sensors and Applications XV, 1065408 (14 May 2018); doi: 10.1117/12.2304489; https://doi.org/10.1117/12.2304489
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