本工作首次在新型Nd∶Gd_0.1Y_0.9AlO₃（Nd∶GYAP）晶体上实现了540 nm倍频绿光激光器。Nd∶GYAP晶体产生在1 μm波段的基频激光中心波长为1 079.4 nm，在此基础上利用LBO晶体产生的倍频绿色激光的中心波长为539.4 nm，阈值为46 mW，最大输出功率为65 mW。这一激光系统产生的约为540 nm的绿色激光相较于传统Nd离子掺杂的晶体1 064 nm激光倍频而来的532 nm绿色激光，可以有效地避开Nd³⁺位于530 nm附近的吸收峰。因此，具有更长波长、发射峰位于约540 nm处的绿色激光器可以使激光输出更有效，并扩展绿色激光器的应用。

The 540 nm frequency-doubled green laser was first realized on a novel Nd∶Gd_0.1Y_0.9AlO₃(Nd∶GYAP) crystal. The fundamental-frequency wavelength that was generated by Nd∶GYAP crystal centered at 1 079.4 nm, and the frequency-doubled green laser was centered at 539.4 nm with a threshold of 46 mW and a maximum output power of 65 mW. An LBO was selected as the frequency-doubling crystal. The ~540 nm green laser can avoid the absorption peak of Nd³⁺ at near 530 nm. The green laser with longer wavelengths at approximately 540 nm can make the output more efficient, and expand the application of the green laser.