Potsdam University Potsdam Quantum Optics Group

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14476 Potsdam-Golm
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K. Wundke, S. Pötting, J. Auxier, A. Schülzgen, N. Peyghambarian, and N. F. Borrelli
PbS quantum-dot doped glasses for ultrashort-pulse generation
Appl. Phys. Lett. 76 (2000) 10-12


    We investigate the use of PbS quantum-dot doped glasses as saturable absorbers for ultrashort-pulse lasers by means of absorption bleaching experiments and numerical analysis of the pulse shaping process using Haus' master equation. We explain the mode-locking mechanism and the limitations of these absorbers. The generation of transform-limited fs-pulses is predicted by soliton mode-locking initiated by the absorption saturation of higher excited states of the quantum-dot saturable absorber.

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