Accession Number : AD0726659

Title :   Some Methods for Generating Tunable Laser Emission.

Descriptive Note : Final rept. 15 Nov 67-15 Nov 70,

Corporate Author : ROCHESTER UNIV N Y INST OF OPTICS

Personal Author(s) : Hercher,Michael

Report Date : JUN 1971

Pagination or Media Count : 30

Abstract : 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 Nd:YAG 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-5000A(7-diethylamino 4-methyl dye); 5200-5600A(fluorescein dye); and 5600-6500A(rhodamine 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)

Descriptors :   (*LASERS, TUNING DEVICES), (*COHERENT RADIATION, FREQUENCY MULTIPLIERS), RAMAN SPECTROSCOPY, OPTICAL PUMPING, INFRARED RADIATION, LIGHT, ATOMIC ENERGY LEVELS

Subject Categories : Lasers and Masers
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE