Title :
A compact Mach-Zehnder two-mode fiber-optic interferometer for high temperature sensing
Author :
Chan, Hon Man ; Huang, Rong ; Lee, Henry
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Irvine, CA
fDate :
Oct. 30 2005-Nov. 3 2005
Abstract :
A compact high-temperature fiber-optic sensor is demonstrated by fusion splicing a 3.25mm-long two-mode fiber (TMF) between two single mode fibers (SMFs) to form an all-fiber Mach-Zehnder interferometer (MZI). Under optimized splicing conditions, a strong interference is achieved with high extinction ratio (~10dB). Two methods are applied to detect temperature changes from temperature induced wavelength shift and intensity change of a probing light source. Experimental results show the device is capable of monitoring temperature change from 25degC to 425degC with temperature sensitivity of 58pm/degC and 0.45muW/degC with 360muW of input power, respectively, and a theoretical temperature range from 25degC up to 1000degC
Keywords :
Mach-Zehnder interferometers; fibre optic sensors; optical fibre fabrication; splicing; temperature measurement; temperature sensors; 25 to 1000 C; 3.25 mm; 360 muW; Mach-Zehnder fiber-optic interferometer; fiber-optic sensor; fusion splicing; high temperature sensing; probing light source; single mode fiber; temperature induced wavelength shift; two mode fiber; Extinction ratio; Interference; Light sources; Optical fiber devices; Optical fiber sensors; Sensor fusion; Splicing; Temperature distribution; Temperature measurement; Temperature sensors;
Conference_Titel :
Sensors, 2005 IEEE
Conference_Location :
Irvine, CA
Print_ISBN :
0-7803-9056-3
DOI :
10.1109/ICSENS.2005.1597775
