Accession Number : ADA289657

Title :   ARPA Solid State Laser and Nonlinear Materials Program.

Descriptive Note : Final rept.,

Corporate Author : SCHWARTZ ELECTRO-OPTICS INC CONCORD MA RESEARCH DIV

Personal Author(s) : Moulton, Peter F.

PDF Url : ADA289657

Report Date : JUN 1994

Pagination or Media Count : 233

Abstract : The Research Division of Schwartz Electro-Optics, as part of the ARPA Solid State Laser and Nonlinear Materials Program, conducted a three-year study "Erbium-Laser-Based Infrared Sources." The aim of the study was to improve the understanding of semiconductor-laser-pumped, infrared (IR) solid state lasers based on the trivalent rare-earth ion erbium (Er) doped into a variety of host crystals. The initial program plan emphasized operation of erbium-doped materials on the 2.8-3.0 micrometers laser transition. Pulsed, Q-switched sources using that transition, when employed as a pump source for parametric oscillators, can provide tunable mid-IR energy. The dynamics of erbium lasers are more complex than conventional neodymium (Nd)-doped lasers and we intended to use pump-probe techniques to measure the level and temporal behavior of gain in various materials. To do so we constructed a number of different cw Er-doped lasers as probe sources and employed the Cr:LiSAF(LiSrAlF6) laser as a pulsed pump source that would simulate pulsed diode arrays. We identified the 970-nm wavelength pump band of Er as the most efficient and were able to make use of recently developed cw and pulsed InGaAs strained-quantum-well diode lasers in the effort. At the conclusion of the program we demonstrated the first pulsed diode bar pumping of the most promising materials for pulsed operation, the oxide garnets YSGG and GGG and the fluoride BaY2F8. (jg) p.1

Descriptors :   *SOLID STATE LASERS, *COMPOSITE MATERIALS, *NONLINEAR SYSTEMS, *ERBIUM, DIODES, OSCILLATORS, LASER PUMPING, Q SWITCHING, IONS, SOURCES, PROBES, PARAMETRIC ANALYSIS, FLUORESCENCE, SPECTROSCOPY, DYNAMICS, MATERIALS, EXCITATION, ENERGY, ARRAYS, PULSED LASERS, LASERS, LITHIUM, SAPPHIRE, LASER APPLICATIONS, PULSES, OXIDES, ALUMINUM, SILICON, GAIN, OPERATION, TUNING, GALLIUM, VALENCE, TITANIUM, ABSORPTION, INFRARED RADIATION, PUMPS, NEODYMIUM, FLUORIDES, BARIUM, STRONTIUM, GARNET, INTERMEDIATE INFRARED RADIATION, VANADIUM, GADOLINIUM, YTTRIUM, SCANDIUM, RARE EARTH COMPOUNDS.

Subject Categories : Physical Chemistry
      Inorganic Chemistry
      Laminates and Composite Materials
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE