Understanding Lasers and Fiberoptics
Sabbir Ezekiel of MIT walks through how lasers and fiberoptic systems actually work, aimed at engineers, scientists, and medical or technical staff who use the technology but never studied the physics behind it. The course keeps mathematics minimal and leans on plain language, graphic illustrations, and video demonstrations to build physical intuition rather than derivations. Topics move from the basic mechanism that makes a laser different from ordinary light, through cavity and beam behavior, to how optical fibers guide and transmit that light over distance. Applications mentioned throughout ground the theory in practice: bar code readers, compact discs, medical procedures, communications links, sensors, materials processing, printers, spectroscopy, navigation systems, and non-destructive testing. Produced by the MIT Center for Advanced Engineering Study and hosted on MIT OpenCourseWare, the material is organized as a short video series rather than a single talk, making it usable as a self-paced primer for anyone who needs working knowledge of laser and fiberoptic basics without a heavy technical background. No certificate is offered; materials are free to access.