4 January 2013 Reflection-based phase-shifted long period fiber grating for simultaneous measurement of temperature and refractive index
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Abstract
We report a reflection-based phase-shifted long period fiber grating (PS-LPFG) and demonstrate its capability for simultaneous measurement of temperature and external reflective index (RI). The sensor device comprises a grating directly written by CO2 laser and silver-coated end face. A π-shifted LPFG is presented with two attenuation bands through its reflection spectrum. These two bands have different sensitivity towards temperature and external RI that can be used for simultaneous measurement of the two variables. The experimental results show that this probe-type PS-LPFG performs well in terms of linearity and sensitivity.
© 2013 Society of Photo-Optical Instrumentation Engineers (SPIE)
Jie Huang, Xinwei Lan, Amardeep Kaur, Hanzheng Wang, Lei Yuan, Hai Xiao, "Reflection-based phase-shifted long period fiber grating for simultaneous measurement of temperature and refractive index," Optical Engineering 52(1), 014404 (4 January 2013). https://doi.org/10.1117/1.OE.52.1.014404 . Submission:
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