Glasses doped with PbS nanocrystals as optically nonlinear medium for saturable absorber

Vidmantas Gulbinas; Alexander S. Dement'ev; Leonas Valkunas; Gintautas Tamulaitis; I. Motchalov; H. Raaben

doi:10.1117/12.417608

8 March 2001 Glasses doped with PbS nanocrystals as optically nonlinear medium for saturable absorber

Vidmantas Gulbinas, Alexander S. Dement'ev, Leonas Valkunas, Gintautas Tamulaitis, I. Motchalov, H. Raaben

Proceedings Volume 4318, Smart Optical Inorganic Structures and Devices; (2001) https://doi.org/10.1117/12.417608
Event: Advanced Optical Materials and Devices, 2000, Vilnius, United States

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.

Citation Download Citation

Vidmantas Gulbinas, Alexander S. Dement'ev, Leonas Valkunas, Gintautas Tamulaitis, I. Motchalov, and H. Raaben "Glasses doped with PbS nanocrystals as optically nonlinear medium for saturable absorber", Proc. SPIE 4318, Smart Optical Inorganic Structures and Devices, (8 March 2001); https://doi.org/10.1117/12.417608

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