Accession Number : ADA308933

Title :   Improved, High Power, Eye Safe, Solid State Laser.

Descriptive Note : Final rept. 24 Aug-24 Sep 95,

Corporate Author : CRYSTAL ASSOCIATES INC WALDWICK NJ

Personal Author(s) : Stolzenberger, R. A.

PDF Url : ADA308933

Report Date : MAR 1996

Pagination or Media Count : 44

Abstract : The Phase I SBlR technical results demonstrate the feasibility of a solid-state Raman shifter to generate 1.56 micron light. The 1.56 micron laser source was based on a compact, Nd:YAG-pumped, intracavitv Barium Nitrate, solid-state Raman shifter (SSRS). The experiment demonstrated diffraction limited, 1.56 micron output at greater that 250 mJ/pulse, with an optical-to-optical conversion efficiency of 60%. Some nice features of this novel technique were a very large aperture (7.5 mm, used for maximum power extraction) conversion of the highly multimode pump beam to a diffraction limited, single transverse mode output via nonlinear Raman clean-up. Optical damage was avoided through the optical limiting properties of an intracavity nonlinear element. Extremely high conversion efficiency was achieved, and the measured Raman in Barium Nitrate was a record 11 cm/GW 1.064 micron. This Phase I effort provided a laboratory of the SSRS system capabilities, including pulse repetition rate scaling.

Descriptors :   *HIGH POWER, *LASER PUMPING, *SOLID STATE LASERS, *EYE SAFETY, *LASER SAFETY, *RAMAN SPECTRA, CONVERSION, OPTICAL RADAR, Q SWITCHING, OUTPUT, OPTICAL EQUIPMENT, OPTICAL PROPERTIES, HIGH RATE, REPETITION RATE, EFFICIENCY, EIGENVALUES, LASERS, PULSE RATE, NONLINEAR SYSTEMS, DIFFRACTION, SCALING FACTOR, EXTRACTION, MULTIMODE, CLEANING, APERTURES, BARIUM COMPOUNDS, LASER DAMAGE, TRANSVERSE, NITRATES, FREQUENCY SHIFT, ASTIGMATISM, INFRARED OPTICAL SYSTEMS, WAVEGUIDE COUPLERS, BARIUM ALLOYS.

Subject Categories : Lasers and Masers
      Safety Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE