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Paper Abstract and Keywords
Presentation 2007-05-25 11:10
Novel optical frequency domain reflectometry with measurement range beyond laser coherence length by using concatenative reference method
Xinyu Fan, Yusuke Koshikiya, Fumihiko Ito (NTT) OFT2007-13
Abstract (in Japanese) (See Japanese page) 
(in English) Coherent optical frequency domain reflectometry (C-OFDR) shows promise as a powerful tool for the maintenance of optical access networks. For this application, the most important parameters are spatial resolution and measurement range. To obtain a narrow spatial resolution together with a long measurement range, we need a laser with both a broad tunable range and a narrow linewidth to give us a long coherence length. Nowadays, laser diodes (LD) are commercially available that have a broad tunable wavelength range, and a spatial resolution of 22 micrometers has been realized. To extend the measurement range to several kilometers while maintaining a narrow spatial resolution, we must solve the problem of laser coherence length limitation. In this paper, we will propose a novel method based on C-OFDR with a measurement range beyond laser coherence length by using concatenative reference method, which generates concatenative reference signal from an auxiliary interferometer.
Keyword (in Japanese) (See Japanese page) 
(in English) optical frequency domain reflectometry (OFDR) / concatenative reference method / coherence length / / / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 52, OFT2007-13, pp. 61-66, May 2007.
Paper # OFT2007-13 
Date of Issue 2007-05-17 (OFT) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
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 2007-05-24 - 2007-05-25 
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 2007-05-OFT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Novel optical frequency domain reflectometry with measurement range beyond laser coherence length by using concatenative reference method 
Sub Title (in English)  
Keyword(1) optical frequency domain reflectometry (OFDR)  
Keyword(2) concatenative reference method  
Keyword(3) coherence length  
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1st Author's Name Xinyu Fan  
1st Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
2nd Author's Name Yusuke Koshikiya  
2nd Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
3rd Author's Name Fumihiko Ito  
3rd Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
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Speaker Author-1 
Date Time 2007-05-25 11:10:00 
Presentation Time 25 minutes 
Registration for OFT 
Paper # OFT2007-13 
Volume (vol) vol.107 
Number (no) no.52 
Page pp.61-66 
#Pages 6 
Date of Issue 2007-05-17 (OFT) 

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