Accession Number:

ADA159817

Title:

Development of Solid State Vibrational Lasers.

Descriptive Note:

Final rept. 1 Apr 84-31 Mar 85,

Corporate Author:

CORNELL UNIV ITHACA NY LAB OF ATOMIC AND SOLID STATE PHYSICS

Personal Author(s):

Report Date:

1985-08-01

Pagination or Media Count:

15.0

Abstract:

Continuous-wave lasing in the 5 micrometers wavelength region has been obtained on the 2 to 1 vibrational transition of impurity CN- ions in KBr. Population inversion is produced by optical pumping of the weakly allowed first-overtone level of the molecule with a tunable F2 sub A color center laser. We have investigated the energy budget of this solid-state vibrational laser when the v 2 upper laser level is pumped with a CW color center laser. Using pulsed fluorescence techniques and numerical simulations, we find that due to vibrational energy exchange between pairs of CN- ions in the v 1 lower level, waste pump energy is recycled to the v 2 upper level. Ideally the efficiency of this recycyling scheme approaches unity, but due to energy transfer into higher vibrational levels, and because of spectral diffusion within the inhomogeneously broadened CN- profile, the observed recycling efficiency is reduced. To our knowledge this is the first experiment demonstrating defeat of the Manley-Rowe limit. Keywords Continuous-wave lasing Vibrational transition Population inversion Optical pumping Overtone Tunable Color center laser Energy budget Solid-state vibrational laser Color center Fluorescence Vibrational energy exchange Energy transfer Inhomogeneous Manley-Rowe.

Subject Categories:

  • Lasers and Masers

Distribution Statement:

APPROVED FOR PUBLIC RELEASE