A fiber Bragg grating (FBG) pressure sensor with high sensitivity and resolution has been designed and demonstrated. The sensor is configured by firmly fixing the FBG with a metal bellows structure. The sensor works by means of measuring the Bragg wavelen
A novel large-stage atomic force microscope (AFM) for nondestructive characterization of optical thin films is built. An open sample stage and a probe unit are employed to measure samples with large size and weight. Three optical thin films with large are