Silica photonic crystal fiber structure in order to simplify the process of making them

In this research، a new structure of photonic crystal fibers (PCFs) will be proposed،in which instead of using the aire- holes in the cladding region، the flourine (2%) doped solid silica rods in order to reduce the problems associated with deformities of air-holes in the cladding region will be used. Also، in the following، a few of the propagation charactristics of the proposed Photonic Crystal Fiber with a conventional silica Photonic Crystal Fiber such as، Normalized frequency،effective refractive index،total dispersion and higher order dispersions (Group velocity dispersion and Third Order Dispersion) will be analyzed and compared. Finally it will be observed that، the proposed PCF structure is much simpler than the conventional one in the fabrication process. But they are not suitable for femtosecond solitons propagation. Also، it will be shown that، the situation of the conventional Photonic Crystal Fiber is much better than the proposed structure in the femtosecond optical solitons propagation.