High Power Fiber Cables
Normally fiber patch cables with connectors such as SMA can only tolerate around 1 W of power. Several hundred milliwatts of leaked power can heat the epoxy inside the ferrule causing the epoxy to liquify and cover the end face, which in turn leads to attenuation, localized heating, and quick power degradation. In contrast, high power fiber cables are designed to operate in high power applications. They feature air gap ferrule technology that lacks energy-absorbing materials around the fiber end faces. In addition, both ends are coated with an anti-reflection coating in the 400-700 nm range. The damage threshold of the coating is >1 MW/cm2, however this threshold varies depending on launch conditions and operating wavelength.