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Tunable, narrow-band light source in the 1.25 mu m region based on broad-area quantum dot lasers with feedback

Tierno, A. and Ackemann, T. (2007) Tunable, narrow-band light source in the 1.25 mu m region based on broad-area quantum dot lasers with feedback. Applied Physics B: Lasers and Optics, 89 (4). pp. 585-588. ISSN 0946-2171

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Abstract

The coherence of broad-area laser diodes with quantum dot gain medium is improved by frequency-selective feedback. A linewidth of 5-10 GHz at power levels of 10-140 mW is achieved in the wavelength region around 1240 nm, where no other good semiconductor lasers are available. The tuning range is at least 20 nm.