Jun-ichi Nishizawa, a Japanese scientist at Tohoku University, proposed the use of optical fibers for communications in 1963. Bell considered it his most important invention. The device allowed for the. Fiber-optic communication is a form of optical communication for transmitting information from one place to another by sending pulses of infrared or visible light through an optical fiber. Dates, of course, are often approximate, as putting a firm date on the introduction of a new technology is often impossible! the most important. The optical telegraph, invented by Claude Chappe in 1790, was the first practical telecommunications system using optical technology. This technology's journey spans nearly two centuries, marked by groundbreaking innovations and relentless research.