Optimization of the YVO4–Nd3+:YVO4 Laser Spectrum for Femtosecond Pulse Generation

详细

A method for forming a broadened luminescence spectrum (in order to implement femtosecond lasing) has been proposed based on the polarization angular dependences of the luminescence of YVO₄−Nd³⁺:YVO₄ vanadate crystals. The operation of a femtosecond (θ = 25°, ϕ = 0) YVO₄−Nd³⁺:YVO₄ laser based on the ⁴F_3/2‒⁴I_11/2 transition with a semiconductor saturable absorber SESAM used for passive mode locking has been demonstrated for the first time. The minimum pulse width reached 780 fs.