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可重复生长的非线性红外晶体ＡｇＧａＧｅ２是Ｉ—ＩＩＩ－ＶＩ２簇化合物之一。具有对称的负单轴特性。使用光栅选频可调谐ＴＥＡＣＯ２激光器输出的９Ｐ（Ｘ）支线泵浦ＡｇＣａＳｅ２晶体可产生波长４．７５μｍ左右的激光。晶体长度为６．７ｍｍ，在１０．６１μｍ处按互关相位匹配加工。
Reproducible nonlinear infrared crystal AgGaGe2 is one of I-III-VI2 cluster compounds. Symmetrical negative uniaxial characteristics. The 9P (X) branch-line-pumped AgCaSe2 crystal output from a grating selective-frequency tunable TEACO2 laser produces a laser with a wavelength of about 4.75μm. Crystal length of 6.7mm, at 10.61μm by phase-matching process.