Watt-level self-frequency-doubling laser at 540 nm of Nd:LCB crystal by utilizing the energy level splitting

We demonstrated the output power improvement of a self-frequency-doubling (SFD) green laser in Nd3+-doped La2CaB10O19 (Nd:LCB) crystal. The spectra were measured and calculated by the Judd-Ofelt theory [1,2], which provide the design guides for the SFD lasers. Taking advantage of energy level splitting of Nd3+ ions, the output power of 1.7 W SFD green laser was realized with a monolithic configuration at the wavelength of 540 nm because of avoiding the intrinsic absorption of Nd3+ ions, which represent the highest output power in the Nd: LCB crystal. This work not only develops a promising SFD laser crystal, but also provides an effective way for the improvement of the SFD laser output power.

Automated summary

In this study, we demonstrated the improvement in output power of a self-frequency-doubling (SFD) green laser in Nd:LCB crystal. The spectra were measured and calculated using the Judd-Ofelt theory, providing design guidelines for SFD lasers. By taking advantage of energy level splitting of Nd3+ ions, we achieved an output power of 1.7W for a SFD green laser at a wavelength of 540nm, which represents the highest output power in the Nd:LCB crystal and avoids intrinsic absorption of Nd3+ ions. This work not only develops a promising SFD laser crystal, but also provides an effective approach for enhancing SFD laser output power.