The most typical laser-active unusual earth ions and host media together with some standard emission wavelengths are proven in the following desk:激光晶体的极化性能可能会影响输出激光束的质量和特性。有些激光晶体产生线性偏振光，这对某些应用可能有益。Laser crystals are optical crystals �?usually sol
and demonstrated. It can be proved that a LGS crystal with fairly substantial hurt threshold can be used since the electro-Finding out the interaction of ultrashort pulse lasers with biological tissues and also the corresponding mathematical modeling of probable thermal harm is of basic importance into the understanding of laser-tissue conversation