Schemes of a fiber-optic multiplexing sensor array based on a 3 X 3 star coupler.
A Michelson-based fiber-optic low-coherence interferometric quasi-distributed sensing system permitting absolute length measurement in a sensor array is proposed. The main part of the sensing system is a fiberoptic 3 x 3 star coupler. The architecture of fiber-optic sensors can be easily realized as a linear sensor array, twin sensor arrays, or a loop sensor array. The proposed sensing scheme will be useful for the measurement of strain distribution. An important application could be deformation sensing in smart structures. A six-sensor array is demonstrated experimentally.
Yuan
Libo
L
Department of Physics, School of Science, Harbin Engineering University, Harbin 150001, China. lbyuan@vip.sina.com
Yang
Jun
J