Long-Period Fiber-Grating Temperature Sensors in Ge–B-Codoped Fibers with Temperature/Strain Discrimination
Long-Period Fiber-Grating Temperature Sensors in Ge–B-Codoped Fibers with Temperature/Strain Discrimination
复制标题
具有温度/应变辨别功能的 Ge-B 共掺光纤长周期光纤光栅温度传感器
DOI：
10.1143/jjap.47.6833
复制
发表时间：
2008
影响因子：
1.5
通讯作者：
Shirou Yoshikura
中科院分区：
文献类型：
--
作者：
T. Mizunami;Yoshihito Ishida;Shirou Yoshikura
The temperature-sensing characteristics of long-period fiber gratings were compared for different Ge–B-codoped fibers. The temperature sensitivities varied by one order of magnitude depending on the composition of the core. The temperature sensitivity varied from 0.05 to 0.5 nm/K for the same grating period of 212 µm. The sensitivities at cryogenic temperatures down to 77 K were also studied. The strain sensitivities were measured at above the room temperature. Two different loss peaks of a single long-period grating with negative temperature sensitivities and positive strain sensitivities were used to distinguish applied temperature and strain. Discrimination characteristics using a Ge–B-codoped fiber were studied for a strain of up to 4000 µε.
