The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 03, 2012
Filed:
Dec. 29, 2010
Kyung Hyun Park, Daejeon, KR;
Namje Kim, Daejeon, KR;
Young Ahn Leem, Daejeon, KR;
Sang-pil Han, Daejeon, KR;
Hyunsung Ko, Seoul, KR;
Chul-wook Lee, Daejeon, KR;
Dong-hun Lee, Daejeon, KR;
Jaeheon Shin, Daejeon, KR;
Eundeok Sim, Daejeon, KR;
Yongsoon Baek, Daejeon, KR;
Kyung Hyun Park, Daejeon, KR;
Namje Kim, Daejeon, KR;
Young Ahn Leem, Daejeon, KR;
Sang-Pil Han, Daejeon, KR;
Hyunsung Ko, Seoul, KR;
Chul-Wook Lee, Daejeon, KR;
Dong-Hun Lee, Daejeon, KR;
Jaeheon Shin, Daejeon, KR;
Eundeok Sim, Daejeon, KR;
Yongsoon Baek, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
Provided is a multiple distributed feedback laser device which includes a first distributed feedback region, a modulation region, a second distributed feedback region, and an amplification region. An active layer is disposed on the substrate of the first distributed feedback region, the modulation region, the second distributed feedback region, and the amplification region. A first diffraction grating is disposed in the first distributed feedback region to be coupled to the active layer in the first distributed feedback region. A second diffraction grating is disposed in the second distributed feedback region to be coupled to the active layer in the second distributed feedback region. The multiple distributed feedback laser device further includes a first micro heater configured to supply heat to the first diffraction grating and a second micro heater configured to supply heat to the second diffraction grating.