Single-mode fiber-optic Fabry–Perot interferometry sensor based on optical cross-correlation demodulation

Ke Chen; Zelin Wang; Min Guo; Bowen Liu; Qingxu Yu

doi:10.1117/1.OE.58.2.026106

8 February 2019 Single-mode fiber-optic Fabry–Perot interferometry sensor based on optical cross-correlation demodulation

Ke Chen, Zelin Wang, Min Guo, Bowen Liu, Qingxu Yu

Author Affiliations +

Optical Engineering, Vol. 58, Issue 2, 026106 (February 2019). https://doi.org/10.1117/1.OE.58.2.026106

Abstract

A single-mode fiber-optic Fabry–Perot interferometry (FPI) sensor based on optical cross-correlation demodulation is presented, with advantages of both low cost and small size. The sensor mainly consists of a light-emitting diode, a glass wafer, a linear charge-coupled device, a cylindrical lens, a fiber-optic coupler, a sensing head, and a circuit board. The cavity length of the FPI sensor is demodulated by the optical cross-correlation relationship between the glass wafer and the Fabry–Perot cavity. When the cavity length changes, the pixel number corresponding to the peak value of the cross-correlation image shifts accordingly. To optimize the demodulation parameters, a simulation model is established. The experimental results show that the resolution and variation range of cavity length measurement are achieved to be 0.6 nm and ±4 μm, respectively. The proposed fiber-optic sensor is promising for the temperature and pressure measurements in circumstances of intense electromagnetic interference and long distance.

Citation Download Citation

Ke Chen, Zelin Wang, Min Guo, Bowen Liu, and Qingxu Yu "Single-mode fiber-optic Fabry–Perot interferometry sensor based on optical cross-correlation demodulation," Optical Engineering 58(2), 026106 (8 February 2019). https://doi.org/10.1117/1.OE.58.2.026106

Received: 18 October 2018; Accepted: 15 January 2019; Published: 8 February 2019

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