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Paper Abstract and Keywords
Presentation 2010-08-27 17:45
Incident-Power-Dependent Extinction Ratio of 1.3-um Electroabsorption Modulator Integrated with DFB laser: Theory and Experiment
Takeshi Fujisawa, Takayuki Yamanaka, Takashi Tadokoro, Naoki Fujiwara, Masakazu Arai, Wataru Kobayashi, Yoshihiro Kawaguchi, Ken Tsuzuki, Fumiyoshi Kano (NTT) EMD2010-61 CPM2010-77 OPE2010-86 LQE2010-59 Link to ES Tech. Rep. Archives: EMD2010-61 CPM2010-77 OPE2010-86 LQE2010-59
Abstract (in Japanese) (See Japanese page) 
(in English) We have found that the extinction ratio of an electroabsorption modulator integrated with DFB laser strongly depends on the incident power to the modulator. Our theoretical consideration based on the full device simulation reveals that the temperature change in the modulator dominates the phenomenon. To obtain the intrinsic extinction characteristics of the modulator, a microscopic theory, which takes into account quantum mechanical many-body interactions in semiconductors, is used to exclude unknown experimental fitting parameters. Heat-flux analysis is performed for the calculation of the temperature distribution in the entire device. As the incident power to the modulator increases, the photo-current is also increased, leading to the increase in the temperature of the modulator by some tens of degrees Celsius induced by Joule heating. The increase red-shifts the absorption spectrum of the modulator and the detuning, which is the difference between a lasing wavelength and a band-edge wavelength of the modulator, becomes small, leading to larger extinction ratio. Calculated results are in good agreement with the experiment showing the validity of our discussion, and indicate that the extinction ratio of electroabsorption modulators is strongly affected by the internal heating of the device.
Keyword (in Japanese) (See Japanese page) 
(in English) Electroabsorption modulator / quantum well / many-body theory / heat-flux analysis / / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 181, LQE2010-59, pp. 163-168, Aug. 2010.
Paper # LQE2010-59 
Date of Issue 2010-08-19 (EMD, CPM, OPE, LQE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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Download PDF EMD2010-61 CPM2010-77 OPE2010-86 LQE2010-59 Link to ES Tech. Rep. Archives: EMD2010-61 CPM2010-77 OPE2010-86 LQE2010-59

Conference Information
Committee EMD OPE LQE CPM  
Conference Date 2010-08-26 - 2010-08-27 
Place (in Japanese) (See Japanese page) 
Place (in English) Chitose Arcadia Plaza 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To LQE 
Conference Code 2010-08-EMD-OPE-LQE-CPM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Incident-Power-Dependent Extinction Ratio of 1.3-um Electroabsorption Modulator Integrated with DFB laser: Theory and Experiment 
Sub Title (in English)  
Keyword(1) Electroabsorption modulator  
Keyword(2) quantum well  
Keyword(3) many-body theory  
Keyword(4) heat-flux analysis  
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1st Author's Name Takeshi Fujisawa  
1st Author's Affiliation NTT Photonics Laboratories (NTT)
2nd Author's Name Takayuki Yamanaka  
2nd Author's Affiliation NTT Photonics Laboratories (NTT)
3rd Author's Name Takashi Tadokoro  
3rd Author's Affiliation NTT Photonics Laboratories (NTT)
4th Author's Name Naoki Fujiwara  
4th Author's Affiliation NTT Photonics Laboratories (NTT)
5th Author's Name Masakazu Arai  
5th Author's Affiliation NTT Photonics Laboratories (NTT)
6th Author's Name Wataru Kobayashi  
6th Author's Affiliation NTT Photonics Laboratories (NTT)
7th Author's Name Yoshihiro Kawaguchi  
7th Author's Affiliation NTT Photonics Laboratories (NTT)
8th Author's Name Ken Tsuzuki  
8th Author's Affiliation NTT Photonics Laboratories (NTT)
9th Author's Name Fumiyoshi Kano  
9th Author's Affiliation NTT Photonics Laboratories (NTT)
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Speaker Author-1 
Date Time 2010-08-27 17:45:00 
Presentation Time 25 minutes 
Registration for LQE 
Paper # EMD2010-61, CPM2010-77, OPE2010-86, LQE2010-59 
Volume (vol) vol.110 
Number (no) no.178(EMD), no.179(CPM), no.180(OPE), no.181(LQE) 
Page pp.163-168 
#Pages
Date of Issue 2010-08-19 (EMD, CPM, OPE, LQE) 


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