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Nd-doped glass (3.5 wt% Nd2O3) is sputtered on Corning No. 7059 glass to make an active thin-film waveguide. The thin film is pumped with a Xe flash tube, and the amplification of 1.06-μm laser light that propagates in the thin film is observed.
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Yajima et al. (1972) studied this question.
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