基于半导体材料仅在响应波段外激光作用下,探测器对波段外激光吸收很小,而在响应波段内激光和波段外激光共同作用下,探测器对波段外激光的吸收增强,文中提出了差动法测量材料的透射率和反射率。并利用吸收系数的表达式,对比有无波段内激光两种情况的吸收系数,检测其吸收的增强。理论上认为这是一种较好的测量方法。 Based on the semiconductor material only in the response band outside the laser, the detector outside the band laser absorption is very small, and in the response band laser and band laser together, the detector on the band outside the laser absorption increased, the paper proposed the difference Actually measure the material’s transmission and reflectance. And the absorption coefficient of the expression, compared with or without the band laser absorption coefficient of two cases, to detect the absorption enhancement. In theory, this is a better measurement method.