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Paper Abstract and Keywords
Presentation 2010-01-21 15:40
Optical Reflectometry Using Optical Frequency Comb with Multi-Phase Modulation
Hiroshi Takahashi, Zuyuan He, Kazuo Hotate (Univ. of Tokyo) OFT2009-72
Abstract (in Japanese) (See Japanese page) 
(in English) As a technology to diagnose the breakdown points in fiber optic networks/devices, various kinds of optical fiber reflectometry have been developed with rapidly improved performance. We proposed an optical coherence domain reflectometry using optical frequency comb (OCDR-OFC), which enables high spatial resolution, large dynamic range, and fast measurement speed at the same time. We succeeded in measuring the reflectivity distribution with 2-cm spatial resolution, over 35-dB dynamic range, and 10-s measurement time. However, the measurement range of OCDR-OFC is currently limited to 1.25-m measurement range as the trade off between spatial resolution and measurement range.
In this paper, we propose and demonstrate a novel optical frequency comb generation method with multi-phase modulation to increase the sideband number of generated optical frequency comb. In this basic experiment, we first generate the optical frequency comb using multi-phase modulation. Then we measure the reflectivity profile with the generated optical frequency comb.
In the experiment on OCDR using optical frequency comb with multi-phase modulation, we succeeded in demonstrating reflectivity distribution measurement with 5-cm spatial resolution, over 45-dB dynamic range, 10-s measurement time, and 12-m measurement range at the same time. We showed the possibility of the measurement range elongation in a high spatial resolution reflectometry.
Keyword (in Japanese) (See Japanese page) 
(in English) optical reflectometry / optical coherence / optical frequency comb / multi-phase modulation / reflectivity / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 377, OFT2009-72, pp. 55-60, Jan. 2010.
Paper # OFT2009-72 
Date of Issue 2010-01-14 (OFT) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee OFT  
Conference Date 2010-01-21 - 2010-01-22 
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 2010-01-OFT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Optical Reflectometry Using Optical Frequency Comb with Multi-Phase Modulation 
Sub Title (in English)  
Keyword(1) optical reflectometry  
Keyword(2) optical coherence  
Keyword(3) optical frequency comb  
Keyword(4) multi-phase modulation  
Keyword(5) reflectivity  
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Keyword(8)  
1st Author's Name Hiroshi Takahashi  
1st Author's Affiliation The University of Tokyo (Univ. of Tokyo)
2nd Author's Name Zuyuan He  
2nd Author's Affiliation The University of Tokyo (Univ. of Tokyo)
3rd Author's Name Kazuo Hotate  
3rd Author's Affiliation The University of Tokyo (Univ. of Tokyo)
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Speaker Author-1 
Date Time 2010-01-21 15:40:00 
Presentation Time 25 minutes 
Registration for OFT 
Paper # OFT2009-72 
Volume (vol) vol.109 
Number (no) no.377 
Page pp.55-60 
#Pages 6 
Date of Issue 2010-01-14 (OFT) 

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