【Abstract】 There has been an increasing interest in the research of diode laser pumped sol id state lasers in recent years because of the rapid development of high power d iode laser.This paper reports the crystal growth and the spectral properties of low temperature phase Nd 3+ : β LaSc 3(BO 3) 4crystal.The low temp er ature phase β LaSc 3(BO 3) 4 crystal belongs to the rhombohedral with space group R 32 and cell parameters a =0.9819, c =0.7987mm, Z =3.The 5at.% Nd 3+ :β LaSc 3(BO 3) 4 crystal is only grown by the flux method.Nd 3+ :β LaSc 3(BO 3) 4 crystal with dimension of 43mm×32mm×15mm has been g rown by TSSG method.Its spectral properties have been investigated.The results show that the FWHM of absorption band at 808nm is 3.3nm,the fluorescence lifetime is 112μs,the emission cross section at 1063nm is 15.6×10 -20 cm 2.Based on J udd Ofelt theory,the spectral parameters were obtained:the parameters of line s trengths Ω λ are Ω 2=2.85×10 -20 cm 2, Ω 4=3.69×10 -20 cm 2, Ω 6=4.73×10 -20 cm 2,the ratiative lifetime is 226μs,thu s,the quantum efficiency is 49.4%.On the other hand ,the second harmonic genera tion (SHG) effect has been observed in Nd 3+ :β LaSc 3(BO 3) 4 crystal. In conclusion,Nd 3+ : β LaSc 3(BO 3) 4 crystal cae be regarded as a king of high efficiency self frequency laser material.更多还原