Consideration On Realization Of Low-Loss Total Reflection-Type Hollow-Core Fiber At Mid-Infrared

Theoretical analysis has been made to see the possibility of realization of low-loss hollow core optical fiber made of a glass functioning as the cladding whose refractive index is lower than unity. It is shown that such total reflection-type waveguide can be realized only when the refractive index of the cladding is near unity not far from unity and also the absorption loss is extremely small.