Fiber-optic hydrogen sensor based on polarization-diversity loop interferometer

被引:0
作者
Youngho Kim
Tae Kyu Noh
Yong Wook Lee
Eung-Soo Kim
Bo-Sung Shin
Sang-Mae Lee
机构
[1] Pukyong National University,School of Electrical Engineering
[2] Pusan University of Foreign Studies,Division of Digital Media Engineering
[3] Pusan National University,Engineering Research for Net Shape and Die Manufacturing
[4] Busan Techno-Park,MEMS/NANO Fabrication Center
来源
Journal of the Korean Physical Society | 2013年 / 62卷
关键词
Hydrogen sensor; Optical fiber sensor; Polarization-maintaining fiber; Polarization-diversity loop;
D O I
暂无
中图分类号
学科分类号
摘要
In this study, we have demonstrated a fiber-optic hydrogen sensor using a polarization-diversity loop interferometer composed of a polarization beam splitter, two quarter-wave plates, and a polarization-maintaining fiber coated with palladium whose thickness was ∼400 nm. One dip in the output interference spectrum of the proposed sensor, chosen as a sensor indicator, was observed to spectrally shift with increasing hydrogen concentration. At a hydrogen concentration of 4%, the sensing indicator showed a wavelength shift of ∼2.48 nm. The response time of the proposed sensor was measured as 10–12.5 s and did not show significant dependence on the hydrogen concentration except for a hydrogen concentration of 4%. In particular, compared with other hydrogen sensors based on side-polished fibers or fiber gratings, the proposed sensor is much more durable because UV illumination or physical/chemical etching process is not necessary for the optical fiber and thus is highly resistant to external stress applied on a transverse axis of an optical fiber.
引用
收藏
页码:575 / 580
页数:5
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