13 Jul 2011 Composite laser crystals (sometimes called hybrid laser crystals) are laser crystals which have been fabricated by combining different parts. Typically, adhesive-free diffusion bonding of carefully prepared crystal surfaces is used, e.g., to combine an Nd:YAG or Yb:YAG crystal with an undoped YAG crystal. The same can be done e.g. with Nd:YVO4. Another possibility is to bond a Cr:YAG crystal (a saturable absorber material for passive Q switching) to Nd:YAG. In other cases, a nonlinear crystal material for nonlinear frequency conversion is bonded to a laser crystal. Composite gain media can also be made of glasses and from ceramics.
NdYAG+CrYAG
YAG+NdYAG+CrYAG
NdYVO4+YVO4
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