Some Methods for Generating Tunable Laser Emission.
Final rept. 15 Nov 67-15 Nov 70,
ROCHESTER UNIV N Y INST OF OPTICS
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The program had as its goal the study of methods for obtaining high power coherent emission at a variety of wavelengths, using conventional lasers as primary sources. Conversion techniques included stimulated Raman scattering, sum frequency generation and combinations of the two--using Q-switched and CW NdYAG lasers as sources. A number of wavelengths in the visible were generated at peak powers of 10 to 100 KW by first generating stimulated Raman emission, and then second harmonics and sums of the Raman lines. The second phase of the program involved organic dye lasers mainly rhodamine 6G. Both laser-pumped dye lasers and flashlamp-pumped dye systems were studied experimentally. A flashlamp pumped dye laser was operated in a single mode which could be tuned from 4400A-5000A7-diethylamino 4-methyl dye 5200-5600Afluorescein dye and 5600-6500Arhodamine 6G dye at a peak power of several KW in microsec. pulses at 30 pps. A transverse-flow dye laser capable of KHz operation was built and will soon be tested. Work in this area recently culminated in a continuous, tunable dye laser 150 mW tuning range 5230A to 6560A pumped by a 2 watt argon ion laser. Author
- Lasers and Masers