Unique temperature sensing characteristics of CO2-laser-notched long-period fiber gratings

被引：23

作者：

Wang, Yiping ^{[1
,2
]}

Jin, Wei ^{[1
]}

Wang, D. N. ^{[1
]}

机构：

[1] Hong Kong Polytech Univ, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China

[2] Inst Photon Technol, D-07745 Jena, Germany

来源：

OPTICS AND LASERS IN ENGINEERING | 2009年 / 47卷 / 10期

关键词：

Optical fiber sensors; Long-period fiber gratings; Fiber Bragg gratings; Temperature; polarization-dependent loss; STRESS-RELAXATION; WRITTEN; PULSES; SENSORS; STRAIN;

D O I：

10.1016/j.optlaseng.2009.03.005

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Long-period fiber gratings (LPFGs) are written by use of a focused CO2 laser beam to notch periodically on the surface of optical fibers. Temperature characteristics of the CO2-laser-notched LPFG are investigated in detailed to develop its sensing applications. It is shown that, for such LPFG, temperature sensitivity of resonant wavelength can be increased by creating deeper notches. The coupling from the fundamental core mode to a cladding mode in the LPFG can be enhanced by increasing the ambient temperature. The polarization-dependent loss (PDL) of the LPFG depends strongly on the ambient temperature. Such unique temperature characteristics can be used to solve the cross-sensitivity problem between the temperature and the tensile strain. So, the LPFG is a promising temperature sensor based on the wavelength modulation, on the intensity modulation and/or on the PDL modulation. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1044 / 1048

页数：5

共 13 条

[1]

CRAIG RR, 1996, MECH MATER, P94

[2] Long-period fibre grating fabrication with focused CO2 laser pulses [J].

Davis, DD ;

Gaylord, TK ;

Glytsis, EN ;

Kosinski, SG ;

Mettler, SC ;

Vengsarkar, AM .

ELECTRONICS LETTERS, 1998, 34 (03) :302-303

[3] Residual stress relaxation in the core of optical fiber by CO2 laser irradiation [J].

Kim, BH ;

Park, Y ;

Ahn, TJ ;

Kim, DY ;

Lee, BH ;

Chung, Y ;

Paek, UC ;

Han, WT .

OPTICS LETTERS, 2001, 26 (21) :1657-1659

[4] Strain-induced thermally tuned long-period fiber gratings fabricated on a periodically corrugated substrate [J].

Lin, CH ;

Li, Q ;

Au, AA ;

Jiang, Y ;

Wu, EB ;

Lee, HP .

JOURNAL OF LIGHTWAVE TECHNOLOGY, 2004, 22 (07) :1818-1827

[5] Corrugated long-period fiber gratings as strain, torsion, and bending sensors [J].

Lin, CY ;

Wang, LA ;

Chern, GW .

JOURNAL OF LIGHTWAVE TECHNOLOGY, 2001, 19 (08) :1159-1168

[6] Novel fiber-optic sensors based on long-period fiber gratings written by high-frequency CO2 laser pulses [J].

Rao, YJ ;

Wang, YP ;

Ran, ZL ;

Zhu, T .

JOURNAL OF LIGHTWAVE TECHNOLOGY, 2003, 21 (05) :1320-1327

[7] High-temperature stability of long-period fiber gratings produced using an electric arc [J].

Rego, G ;

Okhotnikov, O ;

Dianov, E ;

Sulimov, V .

JOURNAL OF LIGHTWAVE TECHNOLOGY, 2001, 19 (10) :1574-1579

[8] Effect of asymmetric stress relaxation on the polarization-dependent transmission characteristics of a CO2 laser-written long-period fiber grating [J].

Ryu, HS ;

Park, Y ;

Oh, ST ;

Chung, YJ ;

Kim, DY .

OPTICS LETTERS, 2003, 28 (03) :155-157

[9] Long-period fiber gratings as band-rejection filters [J].

Vengsarkar, AM ;

Lemaire, PJ ;

Judkins, JB ;

Bhatia, V ;

Erdogan, T ;

Sipe, JE .

JOURNAL OF LIGHTWAVE TECHNOLOGY, 1996, 14 (01) :58-65

[10] Asymmetric long period fiber gratings fabricated by use of CO2 laser to carve periodic grooves on the optical fiber [J].

Wang, Yi-Ping ;

Wang, D. N. ;

Jin, Wei ;

Rao, Yun-Jiang ;

Peng, Gang-Ding .

APPLIED PHYSICS LETTERS, 2006, 89 (15)

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