Optoelectronics -the study of optics and electronics- affects our everyday lives from the basic use of computers and home entertainment systems to the complex areas of medical science and telecommunications. This introductory-level lab manual introduces the basic concepts of optoelectronics and can be used in any courses dealing with applied physics, fiber optics, or electronic devices. Beginning with a review of topics, such as light characteristics, optical switches, light emitters and detectors, users then develop their own optoelectronics circuits that will be used in conducting experiments.