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

Abstract

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: 0<G1·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 DI,DII,DIII and DIV, 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: DII−DI=DIV−DIII≧8 dptr. |DIII−DII|≧2 dptr.

Dependencies are inferred from the claim text.