Hollow Fiber

The optical fiber used for optical transmission is called hollow fiber, which makes the optical fiber hollow to form a cylindrical space. Hollow optical fiber is mainly used for energy transmission, which can be used for X-ray, ultraviolet and far-infrared light energy transmission.

There are two types of hollow fiber structures:

First, the glass is made into a cylinder, and the principle of its fiber core and cladding is the same as that of the step type. Using the total reflection of light between air and glass. Because most of the light can propagate in the lossless air, it has the function of propagation at a certain distance.

The second is to make the reflectivity of the inner surface of the cylinder close to 1, so as to reduce the reflection loss. In order to improve the reflectivity, it is necessary to set dielectrics in the Jane to reduce the loss of the working wavelength band. For example, the wavelength of 10.6pm and the loss of several db/m can be achieved.