Upconversion of rare-earth ions has been paid more attention because of its application in visible laser and display area.Nd:KGW radiated yellow-orange luminescence under excitation of 808 nm diode laser

and the upconversion spectrum was measured.The upconversion emission peak wavelengths are at 657

631

610

596 and 540 nm.We analyzed the mechanism

and discussed the effect of upconversion on the infrared laser of Nd ions.The feasibility of Nd upconversion laser is also discussed.For comparison

the upconversion emission spectrum of Nd:YLF was also measured.The results indicated that the photon avalanche process was happened when high-doped Nd:KGW was excited by high power 808 nm LD

and yellow-green upconversion luminescence happened in the two materials doped with Nd ions.It's difficult to generate upconversion laser of Nd.