Novel mechanical fiber optic sensors based on long-period fiber gratings written by high-frequency CO2 laser pulses

Yun-Jiang Rao

doi:10.1117/12.482004

9 September 2002 Novel mechanical fiber optic sensors based on long-period fiber gratings written by high-frequency CO₂ laser pulses

Yun-Jiang Rao

Author Affiliations +

Proceedings Volume 4920, Advanced Sensor Systems and Applications; (2002) https://doi.org/10.1117/12.482004
Event: Photonics Asia, 2002, Shanghai, China

Abstract

In this paper, we report novel long-period fiber gratings (LPFGs) fabricated by using a new writing method, which is mainly based on the thermal shock effect of focused high-frequency CO2 laser pulses at several kHz. A number of unique characteristics of such a LPFG, such as bend, torsion and transverse-load, et al, are observed by experiment, for the first time, to our knowledge. Based on these unique characteristics, a novel bend-insensitive LPFG sensor that could solve the problem of cross-sensitivity between bend and other measurands, a novel torsion sensor that can realize absolute measurement of twist rate and a load sensor that can achieve simultaneous measurement of transverse load and temperature using a single LPFG element are demonstrated. These unique features are mainly due to the asymmetrical distribution of the refractive index on the cross-section of the LPFG induced by highfrequency CO2 laser pulses.

Citation Download Citation

Yun-Jiang Rao "Novel mechanical fiber optic sensors based on long-period fiber gratings written by high-frequency CO₂ laser pulses", Proc. SPIE 4920, Advanced Sensor Systems and Applications, (9 September 2002); https://doi.org/10.1117/12.482004

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