High-performance multiplexed vibration sensor system based on fiber lasers

Hao Xiao; Yongjie Wang; Fang Li; Yuliang Liu

doi:10.1117/12.755428

26 November 2007 High-performance multiplexed vibration sensor system based on fiber lasers

Hao Xiao, Yongjie Wang, Fang Li, Yuliang Liu

Proceedings Volume 6830, Advanced Sensor Systems and Applications III; 683019 (2007) https://doi.org/10.1117/12.755428
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

This paper describes a high-performance multiplexed vibration sensor system using fiber lasers. A serial vibration sensor array consists of four short cavity fiber lasers. The system employs a single, polarization-insensitive, unbalanced Michelson interferometer to translate individual laser wavelength shifts induced by vibration signals into interferometer phase shifts. A dense wavelength division demultiplexor (DWDM) with high channel isolation is inserted to demultiplex each laser signal as a wavelength filter. Finally, a digital phase demodulator based on the phase generated carrier technique is used to achieve high-resolution interrogation. Experimental results show that no observable crosstalk is measured on the output channels, and the minimal detectable acceleration of this system is ~200ng/&sqrt;Hz at 250Hz, which is fundamentally limited by the frequency noise of the lasers.

Citation Download Citation

Hao Xiao, Yongjie Wang, Fang Li, and Yuliang Liu "High-performance multiplexed vibration sensor system based on fiber lasers", Proc. SPIE 6830, Advanced Sensor Systems and Applications III, 683019 (26 November 2007); https://doi.org/10.1117/12.755428

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