Patent ID: 6845111

Claim:
A laser apparatus, comprising: a lasing layer fabricated of an active lasing medium, said lasing layer having an upper surface and a lower surface; and a substrate layer having an upper surface and a lower surface, the upper surface of said substrate layer being diffusion-bonded to the lower surface of said lasing layer, said substrate layer being laser inactive, wherein: said laser apparatus has a first apparatus axis and a second apparatus axis being in a plane defined by said lasing layer and said first apparatus axis being perpendicular to said second apparatus axis; said lasing layer having a first lasing layer thermal expansion coefficient in a direction defined by said first apparatus axis and having a second lasing layer thermal expansion coefficient in a direction defined by said second apparatus axis; said substrate layer having a first substrate layer thermal expansion coefficient in a direction defined by said first apparatus axis and having a second substrate layer thermal expansion coefficient in a direction defined by said second apparatus axis; and said first lasing layer thermal expansion coefficient being matched to said first substrate layer thermal expansion coefficient and said second lasing layer thermal expansion coefficient being matched to said second substrate layer thermal expansion coefficient.