31 January 2008 Low-noise monolithic mode-locked semiconductor lasers through low-dimensional structures
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The design of a quantum well (QW) based high-saturation energy and low-loss gain region allows a high power density which ensures efficient saturation of the absorber, increases the efficiency, and lowers the noise of monolithic modelocked lasers. This is illustrated though 10 GHz all-active lasers with different number of quantum wells. By comparing a 40 GHz quantum dot and a 40 GHz quantum well laser we discuss the physical difference in the dynamics of the devices. The slow dynamics of quantum dots (QD), results in low self-phase modulation for picosecond pulses and a strong damping of intensity fluctuations, which gives rise to clean optical spectra and very low noise for passive mode-locking.
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Kresten Yvind, David Larsson, Jesper Mørk, Jørn M. Hvam, Mark Thompson, Richard Penty, and Ian White "Low-noise monolithic mode-locked semiconductor lasers through low-dimensional structures", Proc. SPIE 6909, Novel In-Plane Semiconductor Lasers VII, 69090A (31 January 2008); doi: 10.1117/12.768641; https://doi.org/10.1117/12.768641


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