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Paper Abstract and Keywords
Presentation 2008-01-25 09:30
Generation of Spiral Rotational Modes due to Evanescent Coupling between Two Circular Optical Fiber Arrays
Hiroyuki Yoshida, Noriaki Tsukada (HIT) OFT2007-56
Abstract (in Japanese) (See Japanese page) 
(in English) We investigate coupling dynamics between two circular optical fiber arrays by use of the discrete coupled wave equations. The calculations are performed with the periodic boundary phase conditions (one round accumulation phase of the arrays is to be $2\pi$ integers) . The numerical results show that when the relative phase difference between two arrays is given by 0, $2\pi$, and $2\pi$ $m$, a stationary mode, a single spiral rotational mode, and a $m$ fold spiral rotational mode are induced, respectively. Furthermore, it is shown that the rotational direction of the spiral modes depends on the coupling strength between two fiber arrays, the rotational velocity of the spiral modes depends on the nonlinear coefficient, and the conversion from the stationary mode to the rotational mode occurs due to the nonlinearity. The phenomena shown in this report give an optical beam steering technique and must be useful to fabricate optical divider and optical combiner.
Keyword (in Japanese) (See Japanese page) 
(in English) Optical Fiber / Evanescent Coupling / Circular Fiber Arrays / Discrete Coupled Wave Equation / Nonlinear Coefficient / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 451, OFT2007-56, pp. 37-40, Jan. 2008.
Paper # OFT2007-56 
Date of Issue 2008-01-17 (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)
Download PDF OFT2007-56

Conference Information
Committee OFT  
Conference Date 2008-01-24 - 2008-01-25 
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 2008-01-OFT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Generation of Spiral Rotational Modes due to Evanescent Coupling between Two Circular Optical Fiber Arrays 
Sub Title (in English)  
Keyword(1) Optical Fiber  
Keyword(2) Evanescent Coupling  
Keyword(3) Circular Fiber Arrays  
Keyword(4) Discrete Coupled Wave Equation  
Keyword(5) Nonlinear Coefficient  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Hiroyuki Yoshida  
1st Author's Affiliation Hiroshima Institute of Technology (HIT)
2nd Author's Name Noriaki Tsukada  
2nd Author's Affiliation Hiroshima Institute of Technology (HIT)
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Speaker Author-1 
Date Time 2008-01-25 09:30:00 
Presentation Time 25 minutes 
Registration for OFT 
Paper # OFT2007-56 
Volume (vol) vol.107 
Number (no) no.451 
Page pp.37-40 
#Pages 4 
Date of Issue 2008-01-17 (OFT) 

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