High-sensitivity temperature-independent strain sensor based on a long-period fiber grating with a CO2-laser engraved rotary structure

T. Zhu; Y. J. Rao; Y. Song; K. S. Chiang

doi:10.1117/12.785788

16 May 2008 High-sensitivity temperature-independent strain sensor based on a long-period fiber grating with a CO₂-laser engraved rotary structure

T. Zhu, Y. J. Rao, Y. Song, K. S. Chiang

Author Affiliations +

Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 70040C (2008) https://doi.org/10.1117/12.785788
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia

Abstract

We present a highly sensitive strain sensor based on the use of a long-period fiber grating with rotary grooves carved by high-frequency CO₂-laser pulses. We observe that, when the rotation rate of the grooves is sufficiently large, the resonance peak of the grating split into two with a wavelength separation that changes sensitively with the strain applied along the grating and remains practically constant with a change in the ambient temperature. By measuring the wavelength separation of the two resonance peaks, we obtain a strain sensitivity of ~0.1 nm/με without any temperature compensation, which is larger than that of a conventional long-period fiber grating by almost two orders of magnitude.

Citation Download Citation

T. Zhu, Y. J. Rao, Y. Song, and K. S. Chiang "High-sensitivity temperature-independent strain sensor based on a long-period fiber grating with a CO₂-laser engraved rotary structure", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70040C (16 May 2008); https://doi.org/10.1117/12.785788

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