Patent ID: 7177338

Claim:
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: 0 <G 1 ·G 2 <1 with G 1 =1 −L*/R 1 −D·d 2 G 2 =1 −L*/R 2 ·D·d 1 and L*=d 1 +d 2 −D·d 1 ·d 2 d 1 ,d 2 the distances of the resonator mirror from the principal planes of the thermal lens R 1 ,R 2 the radii of curvature of the resonator mirrors wherein the values d 1 , d 2 , R 1 and R 2 are selected in such a manner that the following critical refractive powers D I ,D II ,D III and D IV , for which D I = - 1 R 1 - d 1 - 1 R 2 - d 2 , D II = 1 d 2 - 1 R 1 - d 1 , D III = 1 d 1 - 1 R 2 - d 2 , D IV = 1 d 1 + 1 d 2 applies, the following equations are fulfilled: D II −D I =D IV −D III ≧8dptr. | D III −D II |≧2dptr.