Pulse shortening in the passive Q-switched lasers with intracavity stimulated Raman scattering

The model of passive Q-switching. is expanded on the Raman self-active lasers. The numerical optimization demonstrates a possibility of the essential pulse shortening at fundamental as well as at Stokes wavelengths, T his is achieved by the control of an initial saturable absorption and a resonator's Q-factor at both wavelengths. The achievable pulse widths are in an order of magnitude shorter than those in the absence of Raman self-scattering even in the presence of the excited-state absorption in the saturable absorber. (C) 2003 Elsevier. Science B.V. All rights reserved.