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DFB laser with nonuniform coupling coefficient realized by double-layer buried grating
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- Nilsson, S. (author)
- KTH,Mikroelektronik och Informationsteknik, IMIT
- Kjellberg, T. (author)
- Klinga, T. (author)
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- Wallin, J. (author)
- Streubel, K. (author)
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- (creator_code:org_t)
- Institute of Electrical and Electronics Engineers (IEEE), 1993
- 1993
- English.
- In: IEEE Photonics Technology Letters. - : Institute of Electrical and Electronics Engineers (IEEE). - 1041-1135 .- 1941-0174. ; 5, s. 1128-1131
- Journal article (peer-reviewed)
Abstract
Subject headings
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- A technique for the realization of a nonuniform grating coupling coefficient kappa , and its implementation in distributed-feedback (DFB) lasers is presented. This technique, which is an extension of the buried-grating concept, offers precise control of the coupling coefficient and enables a kappa -ratio greater than 10. DFB lasers with an asymmetric kappa -variation have been fabricated using this method. A front-to-rear facet output power ratio close to five was obtained, qualitatively in agreement with simulations.<>
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Telekommunikation (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Telecommunications (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- DFB laser;asymmetric kappa variation;distributed-feedback;double-layer buried grating;front-to-rear facet output power ratio;grating coupling coefficient;laser diodes;nonuniform coupling coefficient;diffraction gratings;distributed feedback lasers;optical couplers;semiconductor lasers
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