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Proceedings Paper

Narrow-linewidth 1.5μm quantum dot distributed feedback lasers
Author(s): Annette Becker; Vitalii Sichkovskyi; Marko Bjelica; Ori Eyal; Philipp Baum; Anna Rippien; Florian Schnabel; Bernd Witzigmann; Gadi Eisenstein; Johann Peter Reithmaier
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Paper Abstract

The ever-growing need for higher data rates is a driving force for the implementation of higher order coherent communication formats. A key element in coherent detection is the local oscillator (LO) of the decoding unit. This device has to provide coherent light with a narrow linewidth in order to distinguish between different phase and amplitude states of the incoming signal. As predicted by theory, a drastic linewidth reduction is expected from quantum dot (QD) laser materials by the quasi zero-dimensional nature of the gain function. The impact of different gain materials consisting of different numbers of QD layers on the linewidth of distributed feedback (DFB) lasers was investigated and shows an unambiguous dependence on the layer design. Intrinsic linewidths as low as 110 kHz could be determined.

Paper Details

Date Published: 7 March 2016
PDF: 8 pages
Proc. SPIE 9767, Novel In-Plane Semiconductor Lasers XV, 97670Q (7 March 2016); doi: 10.1117/12.2209088
Show Author Affiliations
Annette Becker, Univ. Kassel (Germany)
Vitalii Sichkovskyi, Univ. Kassel (Germany)
Marko Bjelica, Univ. Kassel (Germany)
Ori Eyal, Technion-Israel Institute of Technology (Israel)
Philipp Baum, Univ. Kassel (Germany)
Anna Rippien, Univ. Kassel (Germany)
Florian Schnabel, Univ. Kassel (Germany)
Bernd Witzigmann, Univ. Kassel (Germany)
Gadi Eisenstein, Technion-Israel Institute of Technology (Israel)
Johann Peter Reithmaier, Univ. Kassel (Germany)


Published in SPIE Proceedings Vol. 9767:
Novel In-Plane Semiconductor Lasers XV
Alexey A. Belyanin; Peter M. Smowton, Editor(s)

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