RUMORED BUZZ ON MAGNETO-OPTICAL CRYSTAL

各向异性透明晶体如方解石、石英等的折射率，是其固有的特性，称为永久双折射。All nonlinear crystals for nonlinear frequency conversion are birefringent. This is because they will have their nonlinearity only by becoming non-isotropic, and that also causes birefringence.The birefringence of nonlinear crystal materia