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Proceedings Paper

Glasses doped with PbS nanocrystals as optically nonlinear medium for saturable absorber
Author(s): Vidmantas Gulbinas; Alexander S. Dement'ev; Leonas Valkunas; Gintautas Tamulaitis; I. Motchalov; H. Raaben
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Paper Abstract

Transient changes in absorption of PbS-doped glasses are investigated by means of absorption pump-probe spectroscopy. Two opposite nonlinear effects, bleaching and induced absorption, are observed and their dynamics are investigated in the vicinity of the lowest optical transition of carriers quantum-confined in PbS nanocrystals of different size. Applicability of this composite material as saturable absorber is studied and the nonlinear absorption of the PbS- doped glass is compared with that of solutions of dyes commonly used as saturable absorbers. A potential of utilization of PbS-doped glass in mode locking is discussed and long-time stability of the medium under intense laser irradiation is demonstrated.

Paper Details

Date Published: 8 March 2001
PDF: 5 pages
Proc. SPIE 4318, Smart Optical Inorganic Structures and Devices, (8 March 2001); doi: 10.1117/12.417608
Show Author Affiliations
Vidmantas Gulbinas, Institute of Physics (Lithuania)
Alexander S. Dement'ev, Institute of Physics (Lithuania)
Leonas Valkunas, Institute of Physics (Lithuania)
Gintautas Tamulaitis, Vilnius Univ. (Lithuania)
I. Motchalov, Ctr. TOM (Russia)
H. Raaben, Ctr. TOM (Russia)

Published in SPIE Proceedings Vol. 4318:
Smart Optical Inorganic Structures and Devices
Steponas P. Asmontas; Jonas Gradauskas, Editor(s)

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