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Paper Abstract and Keywords
Presentation 2017-01-19 13:20
Consideration of effects of a core location on bend losses in a buried waveguide
Hiroto Watanabe, Yuta Nito, Junji Yamauchi, Hisamatsu Nakano (Hosei Univ.) PN2016-77 EMT2016-106 OPE2016-152 LQE2016-141 EST2016-116 MWP2016-90
Abstract (in Japanese) (See Japanese page) 
(in English) This paper describes the effects of a core depth on the pure bend loss in a buried waveguide whose core is placed near an air-cladding interface. The eigenmode analysis of a straight waveguide shows that the field extends as the distance between the core and the air region is decreased. Since the extended field is liable to be transformed into a leaky wave when the waveguide is bent, the pure bend loss may increase as the core location approaches the air-cladding interface. On the other hand, the eigenmode field of a bent waveguide reveals that the field is formed depending on the phase relation between the original and folded waves at the air-cladding interface, leading to reduction of the pure bend loss. As a result, the opposite effects occur, which are caused by the appearance and disappearance of the leaky wave as a function of core depth, so that there exists a core location where the total pure bend loss is minimized. Finally, to confine the field to the core and suppress a leaky wave near the air-cladding interface, we propose a new technique based on the introduction of a partial over-cladding layer. The present structure reduces not only the pure bend loss but also the polarization dependent loss over a wide spectral range.
Keyword (in Japanese) (See Japanese page) 
(in English) Beam-propagation method / bent waveguide / bending loss / / / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 390, EST2016-116, pp. 241-246, Jan. 2017.
Paper # EST2016-116 
Date of Issue 2017-01-11 (PN, EMT, OPE, LQE, EST, MWP) 
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 PN2016-77 EMT2016-106 OPE2016-152 LQE2016-141 EST2016-116 MWP2016-90

Conference Information
Committee OPE EST LQE EMT PN MWP IEE-EMT  
Conference Date 2017-01-18 - 2017-01-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Iseshi Kanko Bunka Kaikan 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EST 
Conference Code 2017-01-OPE-EST-LQE-EMT-PN-MWP-EMT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Consideration of effects of a core location on bend losses in a buried waveguide 
Sub Title (in English)  
Keyword(1) Beam-propagation method  
Keyword(2) bent waveguide  
Keyword(3) bending loss  
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1st Author's Name Hiroto Watanabe  
1st Author's Affiliation Hosei University (Hosei Univ.)
2nd Author's Name Yuta Nito  
2nd Author's Affiliation Hosei University (Hosei Univ.)
3rd Author's Name Junji Yamauchi  
3rd Author's Affiliation Hosei University (Hosei Univ.)
4th Author's Name Hisamatsu Nakano  
4th Author's Affiliation Hosei University (Hosei Univ.)
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Speaker Author-1 
Date Time 2017-01-19 13:20:00 
Presentation Time 25 minutes 
Registration for EST 
Paper # PN2016-77, EMT2016-106, OPE2016-152, LQE2016-141, EST2016-116, MWP2016-90 
Volume (vol) vol.116 
Number (no) no.386(PN), no.387(EMT), no.388(OPE), no.389(LQE), no.390(EST), no.391(MWP) 
Page pp.241-246 
#Pages 6 
Date of Issue 2017-01-11 (PN, EMT, OPE, LQE, EST, MWP) 

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