Study the Narrow band pass laser filter

This study was made depending on the equivalent theory performance of narrow pass band filter. This paper studies the equivalent refractive index (N) and the equivalent thickness (Г) to the symmetric arrangements which consists of two materials containing three layers arranged as multilayer: (LHL) (HLH). The wavelength of the laser which is modified with multilayer filter is ( 0=625nm) containing of materials arranged symmetrically.