Nonlinear spectroscopy of PbS quantum-dot-doped glasses as saturable absorbers for the mode locking of solid-state lasers

A. M. Malyarevich, M. S. Gaponenko, K. V. Yumashev, A. A. Lagatsky, W. Sibbett, A. A. Zhilin, A. A. Lipovskii

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

The bleaching relaxation characteristics of PbS quantum dots with diameters in the range of 3.8-4.3 nm synthesized in silicate and phosphate glasses have been studied under the conditions of femtosecond excitation. It has been observed that increase of pump fluence from 0.1 to 2.2 mJ/cm(2) leads to the appearance of a second (slow) component in the bleaching relaxation kinetics and to the shortening of both the fast (from several tens of picoseconds to several picoseconds) and slow relaxation times. An absorption saturation fluence of approximate to 15 mu J/cm(2) with a nonsaturable absorption coefficient of 2.5-3 cm(-1) at 1.05 mu m has been evaluated for the PbS quantum-dot-doped glasses studied. The nature of the nonsaturable absorption and the mechanism of the bleaching relaxation in PbS quantum dots have been discussed. (c) 2006 American Institute of Physics.

Original languageEnglish
Article number023108
Number of pages5
JournalJournal of Applied Physics
Volume100
Issue number2
DOIs
Publication statusPublished - 15 Jul 2006

Keywords

  • NEODYMIUM LASERS
  • RELAXATION

Fingerprint

Dive into the research topics of 'Nonlinear spectroscopy of PbS quantum-dot-doped glasses as saturable absorbers for the mode locking of solid-state lasers'. Together they form a unique fingerprint.

Cite this