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Paper Abstract and Keywords
Presentation 2013-01-25 13:20
Y-00 quantum cipher from transmitter using directly modulated DFB Laser for secure access networks -- 80-km transmission experiment at 2.5 Gb/s --
Fumio Futami, Osamu Hirota (Tamagawa Univ.) OCS2012-94
Abstract (in Japanese) (See Japanese page) 
(in English) Recently National Security Agency (NAS) and Defense Advanced Research Projects Agency (DARPA) in the United States are focusing on the R&D of the cyber security, which clearly shows the ensuring cyber security is the urgent issue. Last year, DARPA changed its policy and started the project of the physical cipher, “Quiness”, for protecting eavesdropping the information in the fiber communication link. The goal of the project is rather high, the bit rate of 1 - 10 Gb/s and distance of 1,000 – 10,000 km. The authors have been conducting theoretically and experimentally the R&D of Y-00 quantum cipher, a physical cipher, to meet such performance. So far, the authors evaluated experimentally Y-00 performance of the security levels as well as the communication systems. The random cipher nature was experimentally measured as the security level evaluation. Y-00 transmission experiments were also demonstrated at the data rate over giga-bit per second in long distance optical fiber transmission lines and error-free performance of 2.5-Gb/s Y-00 transceiver over 160-km installed optical fiber over two months was demonstrated. In this report, the authors propose a direct modulation scheme of Y-00 transmitter for downsizing the transceiver and demonstrate 80-km transmission experiment at data rate of 2.5 Gb/s.
Keyword (in Japanese) (See Japanese page) 
(in English) Y-00 quantum cipher / Y-00 transceiver / downsizing / direct modulation / / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 395, OCS2012-94, pp. 53-58, Jan. 2013.
Paper # OCS2012-94 
Date of Issue 2013-01-17 (OCS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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 OCS CS  
Conference Date 2013-01-24 - 2013-01-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Ehime Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Core and metro networks, Optical access systems, Next-generation PON, Broadband access systems, Wide-area Ethernet, Optical transport network, High-speed interface, Analog optical transmissions, Quantum communications, etc. 
Paper Information
Registration To OCS 
Conference Code 2013-01-OCS-CS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Y-00 quantum cipher from transmitter using directly modulated DFB Laser for secure access networks 
Sub Title (in English) 80-km transmission experiment at 2.5 Gb/s 
Keyword(1) Y-00 quantum cipher  
Keyword(2) Y-00 transceiver  
Keyword(3) downsizing  
Keyword(4) direct modulation  
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1st Author's Name Fumio Futami  
1st Author's Affiliation Tamagawa University (Tamagawa Univ.)
2nd Author's Name Osamu Hirota  
2nd Author's Affiliation Tamagawa University (Tamagawa Univ.)
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Speaker Author-1 
Date Time 2013-01-25 13:20:00 
Presentation Time 25 minutes 
Registration for OCS 
Paper # OCS2012-94 
Volume (vol) vol.112 
Number (no) no.395 
Page pp.53-58 
#Pages
Date of Issue 2013-01-17 (OCS) 


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