Dispersion Compensation in the Fiber-Based Terahertz Communication Links

A combination of the low loss, low positive dispersion long THz fiber and a high negative dispersion short waveguide are used to demonstrate efficient dispersion compensation in a resultant fiber based THz transmission link. The transmission fiber is a graded index porous optical fiber featuring a non-uniform air-hole array with variable air-hole diameters and inter-hole separations for the dispersion reduction. The dispersion compensation waveguide is a metallic hollow tube. The fiber-based THz transmission links with low losses of 0.02 cm^-1, no dispersions and high data rates in the vicinity of its carrier frequency of 0.5 THz can be achieved by combining these two waveguides.