Dynamic Sensor Interrogation Using Wavelength-Swept Laser with aPolygon-Scanner-Based Wavelength Filter

Collection with item attached
2013
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/477574.do
DOI
10.3390/s130809669
Title
Dynamic Sensor Interrogation Using Wavelength-Swept Laser with aPolygon-Scanner-Based Wavelength Filter
Description
This research was supported by the Korea Foundation for the Advancementof Science & Creativity (KOFAC) grant, by Nano-Material TechnologyDevelopment Program through the NRF of Korea grant(2012M3A7B4035095),and by Basic Science Research Program through the National ResearchFoundation of Korea (NRF) (2010-0022645) funded by the Korean Government(MEST).
abstract
We report a high-speed (approximate to 2 kHz) dynamic multiplexed fiber Bragg grating (FBG) sensor interrogation using a wavelength-swept laser (WSL) with a polygon-scanner-based wavelength filter. The scanning frequency of the WSL is 18 kHz, and the 10 dB scanning bandwidth is more than 90 nm around a center wavelength of 1,540 nm. The output from the WSL is coupled into the multiplexed FBG array, which consists of five FBGs. The reflected Bragg wavelengths of the FBGs are 1,532.02 nm, 1,537.84 nm, 1,543.48 nm, 1,547.98 nm, and 1,553.06 nm, respectively. A dynamic periodic strain ranging from 500 Hz to 2 kHz is applied to one of the multiplexed FBGs, which is fixed on the stage of the piezoelectric transducer stack. Good dynamic performance of the FBGs and recording of their fast Fourier transform spectra have been successfully achieved with a measuring speed of 18 kHz. The signal-to-noise ratio and the bandwidth over the whole frequency span are determined to be more than 30 dB and around 10 Hz, respectively. We successfully obtained a real-time measurement of the abrupt change of the periodic strain. The dynamic FBG sensor interrogation system can be read out with a WSL for high-speed and high-sensitivity real-time measurement.
provenance
Made available in Cube on 2018-09-28T12:09:52Z (GMT). No. of bitstreams: 0
language
English
author
Kwon, Yong Seok
Ko, Myeong Ock
Jung, Mi Sun
Park, Ik Gon
Kim, Namje
Han, Sang-Pil
Ryu, Han-Cheol
Park, Kyung Hyun
Jeon, Min Yong
accessioned
2018-09-28T12:09:52Z
available
2018-09-28T12:09:52Z
issued
2013
citation
SENSORS(13): 8
issn
1424-8220
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/477574.do
Funder
교육부
Funding Program
일반연구자지원(교육부)
Project ID
1345198842
Jurisdiction
Rep.of Korea
Project Name
Multi-functional wavelength/time division multiplexing smart optical fiber sensor
rights
openAccess
subject
wavelength-swept laser
fiber Bragg grating
sensor interrogation
strain measurement
semiconductor optical amplifier
type
article


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