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

fYear

2005

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensors, 2005 IEEE

Conference_Location

Irvine, CA

Print_ISBN

0-7803-9056-3

Type

conf

DOI

10.1109/ICSENS.2005.1597775

Filename

1597775