Fiber optic pressure sensing method based on Sagnac interferometer

Yi Zhang; Zhi Zhuang; Ying Chen; Yuanhong Yang

doi:10.1117/12.2070584

11 November 2014 Fiber optic pressure sensing method based on Sagnac interferometer

Yi Zhang, Zhi Zhuang, Ying Chen, Yuanhong Yang

Proceedings Volume 9274, Advanced Sensor Systems and Applications VI; 92740V (2014) https://doi.org/10.1117/12.2070584
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

Abstract

Pressure method using polarization-maintaining photonic crystal fiber (PM-PCF) as sensing element based on Sagnac interferometer is proposed to monitor inter layer pressure in especial compact structure. Sensing model is analyzed and test system is set up, which is validated by experiment. The birefringence can be modified by the deformation of PM-PCF under transverse pressure, realizing pressure measurement by detecting the wavelength shift of one specific valley from output of the Sagnac interferometer. The experiment results show that the output interference fringes were shifted linearly with pressure. The dynamic range of 0 kN ~10kN, sensing precision of 2.6%, and pressure sensitivity of 0.4414nm/kN are achieved, and the strain relaxation phenomenon of cushion can be observed obviously. The sensor has better engineering practicability and capability to restrain interference brought up by fluctuation of environment temperature, which temperature sensitivity is -11.8pm/°C.

Citation Download Citation

Yi Zhang, Zhi Zhuang, Ying Chen, and Yuanhong Yang "Fiber optic pressure sensing method based on Sagnac interferometer", Proc. SPIE 9274, Advanced Sensor Systems and Applications VI, 92740V (11 November 2014); https://doi.org/10.1117/12.2070584

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available