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ID 113645
著者
Oe, Ryo Tokushima University
Taue, Shuji Okayama University|Kochi University of Technology
Nagai, Kosuke Tokushima University
Shibuya, Kyuki Tokushima University
Fukano, Hideki Okayama University
中嶋, 善晶 The University of Electro-Communications
資料タイプ
学術雑誌論文
抄録
Optical frequency combs (OFCs) have attracted attention as optical frequency rulers due to their tooth-like discrete spectra together with their inherent mode-locking nature and phase-locking control to a frequency standard. Based on this concept, their applications until now have been demonstrated in the fields of optical frequency metrology. However, if the utility of OFCs can be further expanded beyond their application by exploiting new aspects of OFCs, this will lead to new developments in optical metrology and instrumentation. Here, we report a fiber sensing application of OFCs based on a coherent link between the optical and radio frequencies, enabling high-precision refractive index measurement based on frequency measurement in radio-frequency (RF) region. Our technique encodes a refractive index change of a liquid sample into a repetition frequency of OFC by a combination of an intracavity multi-mode-interference fiber sensor and wavelength dispersion of a cavity fiber. Then, the change in refractive index is read out by measuring the repetition frequency in RF region based on a frequency standard. Use of an OFC as a photonic RF converter will lead to the development of new applications in high-precision fiber sensing with the help of functional fiber sensors and precise RF measurement.
掲載誌名
Optics Express
ISSN
10944087
出版者
OSA publishing
26
15
開始ページ
19694
終了ページ
19706
発行日
2018-07-20
権利情報
© 2018 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.
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言語
eng
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出版社版
部局
理工学系