CO2 laser frequency multiplication
The duration of the mode-locked CO(2) laser pulses was measured to be 0.9 + or - nsec by the technique of (second harmonic) autocorrelation. Knowing the pulse duration, the spot size, and the harmonic conversion efficiency, a detailed fit of experiment to theory gave an estimate of the nonlinear coefficient of AgGaSe(2). d36 = 31 + or - V(1), in agreement with the most accurate literature values. A number of experiments were made with longer pulse trains in which the highest harmonic energy conversion reached 78%. The damage threshold was measured and it turned out to be related much more strongly to fluence than intensity. The shorter pulse trains had peak intensities of close to 300 MW 1/cm squared whereas the longer trains (3 usec) had intensities up to 40 MW 1/cm squared.
- Research Organization:
- Textron, Inc., Everett, MA (United States). Textron Defense Systems
- OSTI ID:
- 5256618
- Report Number(s):
- AD-A-248574/6/XAB; CNN: N00014-91-C-2279
- Country of Publication:
- United States
- Language:
- English
Similar Records
CO2 laser frequency multiplication
CO2 laser frequency doubling. Final report, 24 Sep 91-24 Apr 92