Two-photon resonances of rare-earth ions in crystals, studied by four-photon mixing
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2014 ◽
Vol 1015
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pp. 566-569
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1980 ◽
Vol 32
(4)
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pp. 403-408
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2016 ◽
Vol 660
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pp. 226-230
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1984 ◽
Vol 40
(6)
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pp. 684-688
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