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Presentation 2017-12-07 13:15
[Poster Presentation] High extinction ratio of polarization splitter based on directional coupler
Hiroya Mitsuno, Takeo Maruyama (Kanazawa Univ.) OPE2017-100 Link to ES Tech. Rep. Archives: OPE2017-100
Abstract (in Japanese) (See Japanese page) 
(in English) High refractive index difference of silicon waveguide enables high-density integration, but due to strong polarization dependence, it becomes a factor which makes the design complicated. As a solution of this problem, we proposed a design of waveguide type polarization splitter based on directional coupler which is advantageous in terms of size. In the past, there is a report of 10 dB extinction ratio in 1550 nm wavelength band, but this time we propose a structure with over 20 dB extinction ratio in 1550 nm wavelength band. It was confirmed by FDTD analysis that it can be realized by setting the combination of coupling length to 1: 2. Furthermore, we fabricated devises using foundry service and report results of measured polarization characteristics. From the result of the measurement, it was confirmed that this device was operating and an extinction ratio of 20 dB or more was obtained.
Keyword (in Japanese) (See Japanese page) 
(in English) polarization splitter / directional coupler / silicon photonics / silicon waveguide / extinction ratio / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 339, OPE2017-100, pp. 59-62, Dec. 2017.
Paper # OPE2017-100 
Date of Issue 2017-11-30 (OPE) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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 OPE2017-100 Link to ES Tech. Rep. Archives: OPE2017-100

Conference Information
Committee OPE  
Conference Date 2017-12-07 - 2017-12-08 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To OPE 
Conference Code 2017-12-OPE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) High extinction ratio of polarization splitter based on directional coupler 
Sub Title (in English)  
Keyword(1) polarization splitter  
Keyword(2) directional coupler  
Keyword(3) silicon photonics  
Keyword(4) silicon waveguide  
Keyword(5) extinction ratio  
1st Author's Name Hiroya Mitsuno  
1st Author's Affiliation Kanazawa University (Kanazawa Univ.)
2nd Author's Name Takeo Maruyama  
2nd Author's Affiliation Kanazawa University (Kanazawa Univ.)
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Date Time 2017-12-07 13:15:00 
Presentation Time 100 
Registration for OPE 
Paper # IEICE-OPE2017-100 
Volume (vol) IEICE-117 
Number (no) no.339 
Page pp.59-62 
#Pages IEICE-4 
Date of Issue IEICE-OPE-2017-11-30 

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