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Title: High efficiency 2 micrometer laser utilizing wing-pumped Tm.sup.3+ and a laser diode array end-pumping architecture

Wing pumping a Tm.sup.3+ doped, end pumped solid state laser generates 2 .mu.m laser radiation at high average powers with high efficiency. Using laser diode arrays to end-pump the laser rod or slab in the wing of the Tm.sup.3+ absorption band near 785 nm results in 2-for-1 quantum efficiency in Tm.sup.3+ because high Tm.sup.3+ concentrations can be used. Wing pumping allows the thermal power generated in the rod or slab to be distributed over a large enough volume to make thermal management practical in the laser gain medium even at high average power operation. The approach is applicable to CW, Q-switched, and rep-pulsed free-laser operation.
Inventors:
 [1]
  1. (Livermore, CA)
Issue Date:
OSTI Identifier:
871241
Assignee:
Regents of University of California (Oakland, CA) LLNL
Patent Number(s):
US 5689522
Contract Number:
W-7405-ENG-48
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
Language:
English
Subject:
efficiency; micrometer; laser; utilizing; wing-pumped; tm; diode; array; end-pumping; architecture; pumping; doped; pumped; solid; generates; radiation; average; powers; arrays; end-pump; rod; slab; absorption; band; near; 785; nm; results; 2-for-1; quantum; concentrations; allows; thermal; power; generated; distributed; volume; management; practical; medium; operation; approach; applicable; cw; q-switched; rep-pulsed; free-laser; thermal management; power generated; absorption band; diode arrays; laser generates; laser operation; laser rod; laser diode; laser radiation; average power; diode array; power operation; quantum efficiency; thermal power; laser utilizing; pumped solid; /372/