Optical characteristics of a quantum-dot laser with a metallic waveguide

We report the optical characteristics of a quantum-dot laser with a metal-coated waveguide, which shows a large group index of 4.2 compared to 3.2 for an uncoated laser. Temperature-dependent measurements reveal a high characteristic temperature in the temperature range of 7 degrees C-25 degrees C....

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Bibliographic Details
Published in:Optics letters 2010-07, Vol.35 (14), p.2373-2375
Main Authors: CHANG, Guo-En, LU, Chien-Yao, YANG, Shang-Hua, LIEN CHUANG, Shun
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Lasers
Optical elements, devices, and systems
Optical waveguides and coupleurs
Optics
Physics
Semiconductor lasers
laser diodes
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Summary:We report the optical characteristics of a quantum-dot laser with a metal-coated waveguide, which shows a large group index of 4.2 compared to 3.2 for an uncoated laser. Temperature-dependent measurements reveal a high characteristic temperature in the temperature range of 7 degrees C-25 degrees C. The optical gain, refractive index change, and linewidth enhancement factor are extracted from the measured Fabry-Perot amplified spontaneous emission spectra. We use the pulse measurements to eliminate the thermal effect and obtain a low linewidth enhancement factor of 0.35.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.35.002373