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Paper Abstract and Keywords
Presentation 2011-05-20 14:35
A study on rotation characteristics of speckle patterns observed in an output light spot from an optical fiber (II)
Yusuke Takahashi, Muneki Kawahara, Makoto Hasegawa (Chitose Inst. of Sci. & Tech.) EMD2011-4
Abstract (in Japanese) (See Japanese page) 
(in English) When coherent light beams (laser beams) are incident on one end of an optical fiber, transmitted to another end to exit from there so as to form an output light spot on a screen, non-uniform intensity distribution called speckle patterns is often recognized in the output light spot. The authors have confirmed that when a multimode optical fiber is placed in a loop onto a support plate, the speckle patterns in the output light spot appear to rotate while rotating the support plate. In this paper, even when an optical fiber was placed in a U-shape, instead of a loop, onto the support plate, the similar rotation of speckle pattern was observed. Furthermore, it was confirmed that a distance between the optical fiber placed in parallel at the edge of the support plate provides certain influences on the observed rotating characteristics of the speckle patterns. Thus, the pattern rotation seems to be caused by displacement of the optical fiber at the edge of the support plate. In addition, in the case where the optical fiber was placed in the U-shape on the support plate, slight differences in the pattern rotation characteristics were recognized between a random polarization-type laser source and a linear polarization-type laser source.
Keyword (in Japanese) (See Japanese page) 
(in English) optical fiber / speckle pattern / coherent light / laser light / sensing / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 55, EMD2011-4, pp. 15-20, May 2011.
Paper # EMD2011-4 
Date of Issue 2011-05-13 (EMD) 
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 EMD  
Conference Date 2011-05-20 - 2011-05-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku Univ. Cyber-Science Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EMD 
Conference Code 2011-05-EMD 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A study on rotation characteristics of speckle patterns observed in an output light spot from an optical fiber (II) 
Sub Title (in English)  
Keyword(1) optical fiber  
Keyword(2) speckle pattern  
Keyword(3) coherent light  
Keyword(4) laser light  
Keyword(5) sensing  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Yusuke Takahashi  
1st Author's Affiliation Chitose Institute of Science and Technology (Chitose Inst. of Sci. & Tech.)
2nd Author's Name Muneki Kawahara  
2nd Author's Affiliation Chitose Institute of Science and Technology (Chitose Inst. of Sci. & Tech.)
3rd Author's Name Makoto Hasegawa  
3rd Author's Affiliation Chitose Institute of Science and Technology (Chitose Inst. of Sci. & Tech.)
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Speaker Author-1 
Date Time 2011-05-20 14:35:00 
Presentation Time 25 minutes 
Registration for EMD 
Paper # EMD2011-4 
Volume (vol) vol.111 
Number (no) no.55 
Page pp.15-20 
#Pages 6 
Date of Issue 2011-05-13 (EMD) 

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