%0 Conference Paper %D 2002 %T Improved Y2O3-ZrO2 waveguide fiber optic sensor for measuring gas-flow temperature above 2000 degrees Celsius %A L. Tong %A L. Ye %A J. Lou %A Shen, Z. %A Y. Shen %A Mazur, E. %K Boston %K MA %X AlthoughY2O3-ZrO2 fiber-optic sensor has been developed for contact measurement of temperature higher than 2000 degree(s)C, its performance is not as good as that of sapphire fiber-optic sensor below 1900 degree(s)C due to the large optical loss of the Y2O3-ZrO2 fiber. In order to improve the Y2O3- ZrO2 fiber-optic sensor for ultra-high-temperature applications, in this work, based on a newly developed rectangular Y2O3-ZrO2 single-crystal waveguide with much lower optical loss, an improved Y2O3- ZrO2 waveguide- fiber-optic sensor has been developed. The sensor has been tested up to near 2300 degree(s)C, we estimate that, the improved sensor has similar performance as the sapphire fiber-optic sensor in accuracy and resolution, except the disadvantage of relatively short waveguide. In addition, in this work, instead of the previous volatile and toxic BeO-coated probe, we use a multi-ions-doped sensor head, which is much stable and safe. %I Fiber Optic Sensor Technology and Applications 2001 %G eng %U /files/mazur/files/rep_574.pdf %R 10.1117/12.456069