Diode-pumped solid-state laser having a thermal lens inside the resonator

摘要

Disclosed is a diode-pumped solid-state laser having an asymmetrical optical resonator provided with at least two resonator mirrors, inside said resonator being provided at least one thermal lens having an optical refractive power D and having two principal planes respectively and said resonator being definable by the following stability criteria: 01.G₂<1 with G₁₌₁-L*/R₁-D.d₂ G₂₌₁-L*/R₂.D.d₁ and L*=d₁+d₂-D.d₁.d₂ d₁,d₂ the distances of the resonator mirror from the principal planes of the thermal lens R₁, R₂ the radii of curvature of the resonator mirrors. The invention is distinguished by the values d₁,d₂,R₁ and R₂ being selected in such a manner that the following critical refractive powers D_I,D_II,D_III and D_IV, for which $\begin{array}{cc}{D}_I=-\frac{1}{R_1-d_1}-\frac{1}{R_2-d_2},& D_{\mathrm{II}}=\frac{1}{d_2}-\frac{1}{R_1-d_1},\end{array}$ $\begin{array}{cc}{D}_{\mathrm{III}}=\frac{1}{d_1}-\frac{1}{R_2-d_2},& D_{\mathrm{IV}}=\frac{1}{d_1}+\frac{1}{d_2}\end{array}$ applies, the following equations are fulfilled: D_II-D_I=D_IV-D_III>=8 dptr. |D_III-D_II|>=2 dptr.