Discrimination of bending and temperature by using a multiwavelength raman fiber laser incorporating a sampled fiber Bragg grating

被引:1
作者
Han, Young-Geun [1 ]
机构
[1] Hanyang Univ, Dept Phys, Seoul 133791, South Korea
基金
新加坡国家研究基金会;
关键词
Simultaneous measurement; Bending sensor; Temperature senor; Multiwavelength Raman fiber laser; Fiber gratings; SENSOR; STRAIN; INDEX;
D O I
10.3938/jkps.61.1349
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A simple and practical scheme for simultaneous measurement of bending and temperature based on a multiwavelength Raman fiber laser incorporating a single sampled fiber Bragg grating (FBG) is investigated. By using a sampled FBG and a Raman gain medium, we generated a multiwavelength Raman fiber laser and then applied it to discriminate between bending and temperature. Because the bending-induced tension strain gradient changes the chirp ratio of the sampled FBG, the wavelength spacing of the multiwavelength Raman fiber laser is changed as the bending curvature increases. The wavelength spacing, however, is not changed by the applied temperature change, but only multiple lasing wavelengths are shifted to longer wavelengths because of the positive thermal properties of the sampled FBG. Because the proposed sensing configuration combines a signal source with a sensing probe, no additional light sources for sensing signals are required. Accordingly, the proposed sensing technique allows for distinguishing between the bending and the temperature sensitivities.
引用
收藏
页码:1349 / 1352
页数:4
相关论文
共 14 条
[1]   Simultaneous pressure and temperature measurement using Hi-Bi fiber Bragg gratings [J].
Chen, GH ;
Liu, LY ;
Jia, HZ ;
Yu, JM ;
Xu, L ;
Wang, WC .
OPTICS COMMUNICATIONS, 2003, 228 (1-3) :99-105
[2]   Optimal Shape Design of Dielectric Micro Lens Using FDTD and Topology Optimization [J].
Chung, Young-Seek ;
Lee, Byungje ;
Kim, Sungchul .
JOURNAL OF THE OPTICAL SOCIETY OF KOREA, 2009, 13 (02) :286-293
[3]   Temperature-insensitive tilt sensor with strain-chirped fiber Bragg gratings [J].
Dong, XY ;
Zhan, CL ;
Hu, K ;
Shum, P ;
Chan, CC .
IEEE PHOTONICS TECHNOLOGY LETTERS, 2005, 17 (11) :2394-2396
[4]   Sampled fibre Bragg grating sensors for simultaneous strain and temperature measurement [J].
Frazao, O ;
Romero, R ;
Rego, G ;
Marques, PVS ;
Salgado, HM ;
Santos, JL .
ELECTRONICS LETTERS, 2002, 38 (14) :693-695
[5]   Bending sensitivity of long-period fiber gratings inscribed in holey fibers depending on an axial rotation angle [J].
Han, Young-Geun ;
Kim, Gilhwan ;
Lee, Kwanil ;
Lee, Sang Bae ;
Jeong, Chang Hyun ;
Oh, Chi Hwan ;
Kang, Hee Jeon .
OPTICS EXPRESS, 2007, 15 (20) :12866-12871
[6]   Simultaneous measurement of bending and temperature based on a single sampled chirped fiber Bragg grating embedded on a flexible cantilever beam [J].
Han, Young-Geun ;
Dong, Xinyong ;
Lee, J. H. ;
Lee, S. B. .
OPTICS LETTERS, 2006, 31 (19) :2839-2841
[9]   Fiber grating sensors [J].
Kersey, AD ;
Davis, MA ;
Patrick, HJ ;
LeBlanc, M ;
Koo, KP ;
Askins, CG ;
Putnam, MA ;
Friebele, EJ .
JOURNAL OF LIGHTWAVE TECHNOLOGY, 1997, 15 (08) :1442-1463
[10]   Dependence of the Transmission Characteristics of Versatile D-shaped Fibers on Temperature and Ambient Index Changes for Different Input Polarization States [J].
Kwon, Oh-Jang ;
Kim, Hyun-Joo ;
Han, Young-Geun .
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, 2010, 56 (04) :1274-1277