Efficient laser action is reported for the (F(2)(+))(A) center in KI with tunability now extending from 2.38 to 3.99 microm. For the F(2)(+) and (F(2)(+))(A) centers coexisting in KI, the combined lasing range is 1.98-3.85 microm. The 1.73-microm line of a pulsed Er:YLF laser pumped both centers simultaneously.
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Irwin Schneider (1982) studied this question.
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