Share Email Print
cover

Proceedings Paper

High speed strain measurement of active mode locking FBG laser sensor using chirped FBG cavity
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

We propose a high speed strain measurement method using an active mode locking (AML) fiber Bragg grating (FBG) laser sensor with a chirped FBG cavity. The mode-locked frequency of the AML laser depends on both the position and Bragg wavelength of the FBG. Thus, the mode-locked frequency of cascaded FBGs can be detected independently along the cavity length of cascaded FBGs. The strain across FBGs can be interrogated dynamically by monitoring the change in mode-locked frequency. In this respect, the chirped FBG critically improves the frequency sensitivity to Bragg wavelength shift as a function of increasing dispersion in the AML cavity. The strain measurement of the FBG sensor shows a highly linear response, with an R-squared value of 0.9997.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103235L (23 April 2017); doi: 10.1117/12.2267641
Show Author Affiliations
Gyeong Hun Kim, Pusan National Univ. (Korea, Republic of)
Joon Young Kim, Pusan National Univ. (Korea, Republic of)
Chang Hyun Park, Pusan National Univ. (Korea, Republic of)
Chang-Seok Kim, Pusan National Univ. (Korea, Republic of)
Hwi Don Lee, Gwangju Institute of Science and Technology (Korea, Republic of)
Youngjoo Chung, Gwangju Institute of Science and Technology (Korea, Republic of)


Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

© SPIE. Terms of Use
Back to Top