| With the application of exploration of laser technology in a long-distance optical communication to the demand of doping of adulterate ion launching wave is 1.5 μm Er3+ ion launch visible band and infrared band individually 550nm(4S3/2→4S15/21.54μm(4I13/22→4I15/2)and 2.94μm(4I11/2→ 4I13/2) laser, behind it 1.54μm is eyes and then performance conveniently. More important it is applied widely in laser medication laser ranging and laser communication and so on. Because about 980nm LD is very universal, it possessed more symbolical than real. It may reach to the purpose of absorbing efficiency improperly to pump light and reduce laser osciuation threshold value.In this paper, Er:Yb:KY(WO4)2 laser crystal sized 15mm×18mm has been grown by TSSG method. The crystal was identified as 6-Er:Yb:KYW by XRD analysis. The transition temperature and melting point were 1031 °C and 1067℃ by TG-DTA curve, respectively. The infrared spectra and Raman spectra were measured, and vibrational frequencies of infrared and raman active modes for Er:Yb:KYW crystal were assigned. Absorption spectrum of the sample was measured, there existed four strong peaks at 380, 525nm, 933nm and 981nm, and the absorption cross section was 3.2×10-20 cm2 at main peak 981nm. Fluorescence spectrum of the crystal was measured by excitation source with 488nm and 978nm respectively, and the lifetime of 4I13/2 was 4.8ms, which showed that Yb3+ as sensitization doped in Er:KYW crystal was significance for absorbing pump light and obtaining strong laser of 1540nm.
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