Some materials such as the fluoride and chalcogenide glasses used in the manufacture of optical fiber lasers cannot have any defects in order for the laser system to be efficient. This can be difficult to obtain because most existing quality control techniques are not compatible to these materials. To address this problem, a novel non-destructive testing (NDT) methodology has been developed based on infrared imaging. This application note shows how infrared imaging can be used to carry out NDT of tens of meters of optical fiber integrity in just a few seconds. Download the full paper for more on how this NDT technique is ideal for the identification of different types of defects in some laser materials.