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Paper Abstract and Keywords
Presentation 2007-05-25 11:10
Mid-infrared DFG using direct-bonded QPM-LN waveguides and its application for trace-gas detection
Tsutomu Yanagawa, Osamu Tadanaga, Katsuaki Magari, Yoshiki Nishida (NTT), Hiroshi Miyazawa (NEL), Masaki Asobe, Hiroyuki Suzuki (NTT) LQE2007-5 Link to ES Tech. Rep. Archives: LQE2007-5
Abstract (in Japanese) (See Japanese page) 
(in English) We achieve efficient difference frequency generation in direct-bonded quasi-phase-matched LiNbO3 waveguides. Mid-infrared light sources in the 2-4$\mu$m bands are obtained with communication band laser diodes. There are many strong absorption lines in the wavelength range originating mainly from normal vibration modes of environmental gasses such as greenhouse effect gasses. Therefore, a drastic improvement in the sensitivity is expected in trace gas detection. We show simultaneous detection of CO isotopomer absorption spectra in the 2.3$\mu$m band with a broadband mid-infrared generation utilizing the feature of small LiNbO3 material refractive dispersion. We also show the detection of ambient CO2 and CH4 absorption spectra with multi-pass cells in the 2.7$\mu$m and 3.3$\mu$m bands. Additionally, the mid-infrared optical axis is easily adjusted in our setup using input collinear near-infrared lights.
Keyword (in Japanese) (See Japanese page) 
(in English) mid-infrared / DFG / QPM / direct-bonding / LiNbO3 / waveguide / greenhouse effect / trace gas  
Reference Info. IEICE Tech. Rep., vol. 107, no. 71, LQE2007-5, pp. 19-26, May 2007.
Paper # LQE2007-5 
Date of Issue 2007-05-18 (LQE) 
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)
Download PDF LQE2007-5 Link to ES Tech. Rep. Archives: LQE2007-5

Conference Information
Committee LQE  
Conference Date 2007-05-25 - 2007-05-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Kanazawa Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Quantum optics, nonlinear optics, ultra-high speed phenomenon, etc 
Paper Information
Registration To LQE 
Conference Code 2007-05-LQE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Mid-infrared DFG using direct-bonded QPM-LN waveguides and its application for trace-gas detection 
Sub Title (in English)  
Keyword(1) mid-infrared  
Keyword(2) DFG  
Keyword(3) QPM  
Keyword(4) direct-bonding  
Keyword(5) LiNbO3  
Keyword(6) waveguide  
Keyword(7) greenhouse effect  
Keyword(8) trace gas  
1st Author's Name Tsutomu Yanagawa  
1st Author's Affiliation NTT Corporation (NTT)
2nd Author's Name Osamu Tadanaga  
2nd Author's Affiliation NTT Corporation (NTT)
3rd Author's Name Katsuaki Magari  
3rd Author's Affiliation NTT Corporation (NTT)
4th Author's Name Yoshiki Nishida  
4th Author's Affiliation NTT Corporation (NTT)
5th Author's Name Hiroshi Miyazawa  
5th Author's Affiliation NTT Electronics Corporation (NEL)
6th Author's Name Masaki Asobe  
6th Author's Affiliation NTT Corporation (NTT)
7th Author's Name Hiroyuki Suzuki  
7th Author's Affiliation NTT Corporation (NTT)
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Speaker Author-1 
Date Time 2007-05-25 11:10:00 
Presentation Time 25 minutes 
Registration for LQE 
Paper # LQE2007-5 
Volume (vol) vol.107 
Number (no) no.71 
Page pp.19-26 
#Pages
Date of Issue 2007-05-18 (LQE) 


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