High Energy Pulsed Liquid Laser
Semiannual technical summary rept. 1 Feb-31 Jul 1973
GTE LABS INC WALTHAM MA
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Significant advances have been made in both the performance and understanding of liquid lasers. High average powers in excess of 400 watts at 5 pps have been obtained during the course of the work. Some scaling laws in terms of the relationship between active volume and power loading have emerged. Finally, a large body of information relating steady-state laser performance to imposed thermal gradients has been obtained, and a method has been devised for reducing the data so that the information it contains is readily displayed. In addition, a hydrodynamic model for the liquid in turbulent flow under various temperature differentials has been obtained. This model provides detailed information on the radial thermal gradient. Under the special condition of extrapolation to zero power input, the model can be related to the experiment and significant information on the nature and the effect of the thermal gradient on laser performance. The picture that emerges from this is then qualitatively extended to the case of high average power loading.
- Lasers and Masers