Eras in the History of Optical Communications

The story of optical communications unfolds across several distinct eras, each defined by new scientific insights, technological breakthroughs, and practical applications. Use the links below to explore each period in detail.

• Ancient & Visual Optical Signaling – Fire beacons, smoke signals, and the great optical telegraph networks of the late 18th and early 19th centuries.
• 19th Century Foundations – Light-guiding experiments and Alexander Graham Bell’s Photophone.
• Birth of Fiber Optics (1950s–1970) – Imaging fibers, the laser, Charles Kao’s vision, and Corning’s low-loss breakthrough.
• Commercialization & System Generations (1970s–2000) – Field trials, single-mode fiber, submarine cables, the EDFA, and the rise of WDM.
• Modern Era & Current Developments (2000s–Present) – Coherent optics, multi-terabit systems, free-space links, and space laser communications.