OPTICAL PUMPS FOR LASERS--PHASE II.
Tri-annual rept. no. 5, 1 Apr-31 Jul 67,
WESTINGHOUSE RESEARCH LABS PITTSBURGH PA
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The work covered in the report can be separated into three tasks. The goal of Task A is to improve the lifetime of xenon flash lamps when operated under high repetition rates. In Task B, the object is to predict the performance of a cw laser system when pumped with a spectral gas discharge lamp. The main emphasis on this task will be the prediction of the spectrum from the lamp and its overlap with an experimentally determined excitation spectrum of a laser material. Verification of the theory and the development of the theory will be done by constructing lamps and measuring their spectral characteristics. Laser tests will also be performed if time and funds are available. In Task C the highly efficient pumping of NdYAG with a K-Hg lamp is to be demonstrated experimentally. Tasks A and B are new areas of study and therefore little in the way of results have been obtained. In Task A, based on information obtained in the literature, a lamp design for improving lifetime has been proposed. The lamp is basically an all quartz body with a molybdenum ribbon electrical feedthrough. In Task B the theoretical approach has been described. Experimental lamps have been constructed and their spectral outputs measured under both cw and pulsed operation. In Task C, a continuation of last years effort, an increase of output power from 9.85 watts to 12.9 watts at 1000 watts input has been measured. By increasing the lamp excitation from 500 Hz to 3000 Hz a much larger improvement is expected. Author
- Lasers and Masers
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