High Power Fiber Cables
Normally fiber patch cables with connectors such as SMA can tolerate only around 1W of power. Just several hundred milliwatts of leaked power will heat the epoxy inside the ferrule. This causes 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 fibers are designed to operate with high power application. They feature air-gap-ferrule technology that excludes the absorption of the light energy by materials around the fiber end face. In addition, both ends are coated with Anti-Reflection coating for 400-700 nm. The threshold damage of the coating is >1MW/cm2, the threshold damage value will vary with launch conditions and operating wavelength.