Ar~ 激光器的被动锁模

一、前言关于Ar~ 激光器的被动锁摸技术最近已有报道。在这类系统中,为了被动锁定Ar~ 的模式,将若丹明6G(一种通常用作Ar~ 泵浦染料激光系统中增益介质的染料)放入Ar~ 激光共振腔内作为饱和吸收体。锁模Ar~ 脉冲依次对若丹明6G激光器进行内腔泵浦,以同步产生短的染料激光脉冲。但是,对于锁模染料激光脉冲没有任何全面的报道,也没有得出染料激光脉冲的详细特性。某些研究工作者对Ar~ 激光脉冲的特性作过更加广泛的描述,包括按碰撞脉冲锁模     

Hyperspectral imaging technology for determination of dichlorvos residue on the surface of navel orange

A hyperspectral imaging system is developed to detect dichlorvos residue on the surface of navel orange.After acquiring hyperspectral images of 400 navel oranges,the actual content of dichlorvos residue is measured by gas chromatography.Optimal wavelengths are extracted using the regression coefficients of partial least squares （PLS）,and a PLS model with 12 factors is established.In the prediction set of 0.2282 11.652-mg/kg pesticide residue,the correlation coefficient and the root mean standard error are 0.8320 and 1.3416,respectively.The hyperspectral imaging technology can meet the requirement of online fast nondestructive detection.