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Paper Abstract and Keywords
Presentation 2011-05-27 10:00
Refractive index sensor for liquids and solids using dielectric multilayer films deposited on optical fiber end surface
Kyung-Su Kim, Yosuke Mizuno (Tokyo Inst. of Tech.), Masayuki Nakano, Seiichi Onoda (Watanabe), Kentaro Nakamura (Tokyo Inst. of Tech.) OFT2011-10
Abstract (in Japanese) (See Japanese page) 
(in English) Fiber-optic refractive index (RI) sensors have been extensively studied for chemical, engineering, and biomedical applications. Most of the conventional RI sensors, however, suffer from the following problems: (1) the sensing area is relatively large, i.e., the spatial resolution is not high, (2) the sensor head is not physically strong, (3) the system is complicated and expensive, and (4) only RI of liquids can be measured. In this paper, in order to resolve the problems above, we propose and demonstrate a novel fiber-optic RI sensor using dielectric multilayer thin films deposited on the optical fiber end surface. We experimentally show that the center frequency of the reflected light spectrum depends on the RI of the liquids and solids attached to the fiber end with a coefficient of +0.61 nm/RIU (refractive index unit). This result is in good agreement with our simulation result based on the characteristic-matrix method. We also discuss how we can improve the sensitivity and compensate the temperature effect for the practical applications.
Keyword (in Japanese) (See Japanese page) 
(in English) Refractive index (RI) sensor / band-pass filter on fiber-end (BOF) / optical fiber sensor / dielectric multilayer thin-film / characteristic-matrix method / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 69, OFT2011-10, pp. 43-48, May 2011.
Paper # OFT2011-10 
Date of Issue 2011-05-19 (OFT) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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Conference Information
Committee OFT  
Conference Date 2011-05-26 - 2011-05-27 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To OFT 
Conference Code 2011-05-OFT 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Refractive index sensor for liquids and solids using dielectric multilayer films deposited on optical fiber end surface 
Sub Title (in English)  
Keyword(1) Refractive index (RI) sensor  
Keyword(2) band-pass filter on fiber-end (BOF)  
Keyword(3) optical fiber sensor  
Keyword(4) dielectric multilayer thin-film  
Keyword(5) characteristic-matrix method  
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Keyword(7)  
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1st Author's Name Kyung-Su Kim  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
2nd Author's Name Yosuke Mizuno  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
3rd Author's Name Masayuki Nakano  
3rd Author's Affiliation Watanabe, Co. Ltd (Watanabe)
4th Author's Name Seiichi Onoda  
4th Author's Affiliation Watanabe, Co. Ltd (Watanabe)
5th Author's Name Kentaro Nakamura  
5th Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
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Speaker Author-1 
Date Time 2011-05-27 10:00:00 
Presentation Time 25 minutes 
Registration for OFT 
Paper # OFT2011-10 
Volume (vol) vol.111 
Number (no) no.69 
Page pp.43-48 
#Pages
Date of Issue 2011-05-19 (OFT) 


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