How to create a photonic bandgap fiber, method for producing a geometrical method, and a photonic bandgap fiber for producing a photonic band gap fiber

摘要

Coupling of surface modes and core mode in (PBF) air-core photonic band gap fiber may generate a large propagation loss. In the computer simulation, analyze the relationship between the existence of surface modes and geometry of PBF with pores triangular pattern, only the core mode (that the fiber does not support surface modes in the entire wavelength range of the band gap is present To clarify the scope of the radius) (for example) the core characteristic dimension. In particular, the pore radius and pore spacing and is equal, in the case of 0.47, the core supports a single mode, it does not support surface modes to the core radius of between about 1.05 to about 0.7, It suggests that it should show the propagation loss is very low such fibers. By without requiring a complete analysis of the defect mode, and checks whether any of the geometry of the fiber or bulk mode alone, the presence of surface modes can be predicted easily and quickly.