The early 1980s fiber optic networks used multimode fiber since that was the best that could be made. Links of ~15km were possible with 850nm lasers but 1310nm lasers were developed to allow longer links or an early version of wavelength-division multiplexing. Since the mid-20th century, the world has experienced monumental shifts in the way we interact with technology. During this era, the. Now we are in the era of the "Space Age" and in 1962, AT&T and NASA launched the world's first communications satellite, Telstar, opening a new era of telecommunications where technical competition between landlines (copper in this era), terrestrial microwave and satellites competed to build the. Rather, through clever and genius-level accomplishments, fiber technology evolved through a series of performance improvements. Due to its large core diameter, multimode fibre can be used with low-cost light sources, making it widely used for short-range transmission. From its inception as a theoretical concept in the 1960s, fiber optics has undergone significant developments, resulting in faster data transmission speeds, improved reliability, and unparalleled performance.
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