Energy-efficient and small enough to fit in a smartphone, an optical amplifier developed at Stanford could improve fiber optic networks and spur new technologies in biosensing, data communications, and more. Optical amplifiers are critical components in modern optical communication systems, enabling the amplification of weak optical signals to compensate for attenuation during transmission. This review article focuses on the fundamentals and broad applications of SOAs, specifically for optical. Optical fiber communications have been the key technology which supports the high-speed transmission of information all over the world, and the optical amplifier is the backbone to enable a steady and rapid growth over the years. The new amplifier offers high performance, is compact enough.
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