Optical fiber has increased signal transmission bandwidth over longer distance, and as the importance of fiber rises, numerous colleges and universities worldwide introduce more courses in optoelectronics and optical communications. This kit is designed to meet the increasing demand for learning and training of fiber optic fundamentals and related practical skills. This Fiber Optic Experimental kit is a sister kit to LEOK-20, and is revised and rewritten to include new experiments such as to measure the parameters of optical fiber beam splitter, attenuator and isolator. Experiment Examples 1.Fundamental knowledge of optical fiber optics 2.Coupling method between optical fiber and light source 3.Multimode fiber numerical aperture (NA) measurement 4.Optical fiber transmission loss property and measurement 5.M-Z optical fiber interference 6.Optical fiber thermal-sensing principle 7.Optical fiber pressure-sensing principle 8.Optical fiber beam splitter parameter measurement 9.Variable optical attenuator and parameter measurement 10.Fiber optic isolator and parameter measurement