晶体如何进行焊接

看到好多文章上面，提到了晶体的焊接，不知道是用什么方法焊的？希望高手指点一下。

As Focusing in optics for more than Six years, Crysmit Photonics CO.,Ltd designs and manufactures a wide range of Crystals Components.
Nonlinear Crystals: BBO,LBO, BIBO, LiNbO3, KTP, KTA ,DKP&DKDP
Laser Crystals: Nd:YAG, Nd:YVO4, Nd:GdVO4, Ti: Sapphire, Er:Glass
Birefringent Crystals: a-BBO, Calcite, YVO4, MgF2
Electro Optic Crystals: BBO, KTP&DKDP
Magneto-Optical Crystals:TGG

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