Efficient (~ 20%) single-mode, cw and quasi-cw laser action of Nd 3+ ions (in the 4 F 3/2 → 4 I 11/2 channel) has been achieved with diode-laser pumping for the first time at room temperature in monoclinic KY(WO 4 ) 2 , KGd(WO 4 ) 2 , and KLu(WO 4 ) 2 crystals with an ordered structure.
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Каминский et al. (1992) studied this question.