The OFC lab manual provides a comprehensive overview of optical fiber fundamentals, detailing apparatus requirements, the theory behind single-mode and multi-mode fibers, and practical experimental setups. This manual contains ten laboratory experiments to be performed by students taking the optical fiber communication course (EE 420). The transmitter module takes the input signal in electrical form and then transforms it into optical. Fibre optic cable functions as a "light guide," guiding the light introduced at one end of the cable through to the other end. The light source can either be a light-emitting diode (LED) or a laser.