TY - JOUR
T1 - Pressure Dependence of Fiber Bragg Grating Inscribed in Perfluorinated Polymer Fiber
AU - Ishikawa, Ryo
AU - Lee, Heeyoung
AU - Lacraz, Amédée
AU - Theodosiou, Antreas
AU - Kalli, Kyriacos
AU - Mizuno, Yosuke
AU - Nakamura, Kentaro
N1 - Funding Information:
Manuscript received *** **, 2017; revised *** ** 2017; accepted *** ** 2015. Date of publication *** **, 2017; date of current version *** **, 2017. This work was partially supported by JSPS KAKENHI Grant Numbers 17H04930 and 17J07226, and by research grants from the Japan Gas Association, the ESPEC Foundation for Global Environment Research and Technology, and the Association for Disaster Prevention Research.
Publisher Copyright:
© 1989-2012 IEEE.
PY - 2017/12/15
Y1 - 2017/12/15
N2 - We investigate the hydrostatic pressure dependence of the Bragg wavelength of a fiber Bragg grating (FBG) inscribed in a perfluorinated graded-index (PFGI-) polymer optical fiber (POF) at 1550 nm. At 0.5 MPa, the Bragg wavelength increased with time and became almost constant 150 min later. Such a long time constant probably originates from the unique structure of the PFGI-POF, which has a thick overcladding around its core and cladding. The pressure-dependence coefficient without considering the time constant was estimated to be 1.3 nm/MPa; this is over five times the values of other types of POF-FBGs. This indicates that by removing the overcladding of the PFGI-POF, fast-response high-sensitivity pressure sensing will be feasible. Once the Bragg wavelength became constant at 0.5 MPa, the pressure-dependence coefficient of the Bragg wavelength was measured to be -0.13 nm/MPa, the absolute value of which was comparable with those of other POF-FBGs, but with an opposite sign.
AB - We investigate the hydrostatic pressure dependence of the Bragg wavelength of a fiber Bragg grating (FBG) inscribed in a perfluorinated graded-index (PFGI-) polymer optical fiber (POF) at 1550 nm. At 0.5 MPa, the Bragg wavelength increased with time and became almost constant 150 min later. Such a long time constant probably originates from the unique structure of the PFGI-POF, which has a thick overcladding around its core and cladding. The pressure-dependence coefficient without considering the time constant was estimated to be 1.3 nm/MPa; this is over five times the values of other types of POF-FBGs. This indicates that by removing the overcladding of the PFGI-POF, fast-response high-sensitivity pressure sensing will be feasible. Once the Bragg wavelength became constant at 0.5 MPa, the pressure-dependence coefficient of the Bragg wavelength was measured to be -0.13 nm/MPa, the absolute value of which was comparable with those of other POF-FBGs, but with an opposite sign.
KW - Polymer optical fibers
KW - fiber Bragg gratings
KW - pressure sensing
KW - temporal variations
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U2 - 10.1109/LPT.2017.2767082
DO - 10.1109/LPT.2017.2767082
M3 - Article
AN - SCOPUS:85032734182
SN - 1041-1135
VL - 29
SP - 2167
EP - 2170
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
IS - 24
M1 - 8086226
ER -