Nd∶GdVO_4晶体生长及其1064nm的激光特性

Growth and Laser Properties of Nd∶GdVO 4 Crystal at 1064nm

本文报道了用 Ｃｚｏｃｈｒａｌｓｋｉ 方法生长 Ｎｄ∶ Ｇｄ Ｖ Ｏ４ 晶体，测量了该晶体的偏振吸收谱和荧光谱，表明晶体在８０８ ．５ｎｍ 有吸收峰，其发射波长在１０６４ｎｍ 。晶体中掺 Ｎｄ 浓度的原子分数为１ ．５６ ％ 的 Ｎｄ∶ Ｇｄ Ｖ Ｏ４ 的４ Ｆ３／２ 荧光寿命为１００μｓ 。用激光二极管泵浦１ｍ ｍ 厚的 Ｎｄ∶ Ｇｄ Ｖ Ｏ４ 晶体，得到了超过１ Ｗ１０６４ｎｍ 的输出光，泵浦阈值为２０ｍ Ｗ，光光转换效率为５５ ．９ ％ ，斜效率为６３ ％ 。

Nd∶GdVO 4 crystal has been grown by using Czochralski method.The polarization absorption and emission spectra of Nd∶GdVO 4 crystal have been measured.The wavelength of the main absorption peak is centered at 808.5nm,and that of the emission peak is centered at 1064nm.The fluorescence lifetime of 4 F 3/2 for 1.56 at% Nd 3+ doped in GdVO 4 crystal is 100μs.Up to 1W output power laser at 1064nm is obtained when Nd∶GdVO 4 crystal is pumped by laser diode (LD) at 808.5nm ,the pumping threshold is 20mW,the light light conversion efficiency is 55.9%,and the slope efficiency is 63%.