Automatic Power Reduction: Complete Guide to APR in Optical Systems
Automatic Power Reduction, commonly called APR, is an important safety feature used in high-power optical communication equipment. It is especially relevant to systems that use Erbium-Doped Fiber Amplifiers (EDFAs), optical amplifiers, and high-capacity fiber networks. In a normal fiber optic system, optical power travels inside the fiber. When the fiber is cut, disconnected, or experiences…