Important notice for Attenuation fiber

The Attenuation Fiber of SWCC CORPORATION is formed of a core doped with cobalt and is characterized by its refractive index profile. Thus it has superior quality in the attenuation property. This Attenuation Fiber has been patented in the US, Japan and European countries as shown below.

Japan: 3271886
The United States: 5841926
Germany: 69734031.7
Britain, France, Italy, Sweden, the Netherlands: 0783117

We suggest strongly that you use our Attenuation Fiber, Optical Fixed Attenuator, Attenuation Fiber Patch Cord, etc. when you use the Cobalt Doped Attenuation Fiber or products incorporating such fiber in Japan, the US and European countries.