IEICE Electronics Express | |
High-sensitivity optical fiber refractive index sensor using multimode interference structure | |
Yoshiki Matsumoto1  Shuji Taue1  Hideki Fukano1  | |
[1] The Graduate School of Natural Science and Technology, Okayama University | |
关键词: MMI; multimode interference; optical fiber sensor; refractive index sensor; | |
DOI : 10.1587/elex.9.302 | |
学科分类:电子、光学、磁材料 | |
来源: Denshi Jouhou Tsuushin Gakkai | |
【 摘 要 】
References(7)Cited-By(5)This letter presents the experimental investigation to increase the sensitivity of an optical fiber refractive index sensor with a multimode interference (MMI) structure. It is confirmed that the interference wavelength can be set in the long-wavelength region by adjusting the sensing-part length. Moreover, it is shown that the fineness of the cores in the input and output fibers is essential to obtain a sharp interference signal. We demonstrate the high sensitivity of an MMI-structured optical fiber sensor by applying it to refractive index measurements of ethanol/water solutions. This refractive index sensor reveals a resolution as fine as 1.8 × 10-5, which is the highest value so far reported in this type and has one order higher sensitivity than a commercially available Abbe refractometer (∼ 10-4).
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201911300651830ZK.pdf | 379KB | download |