In the present work theoretically optimization design of wide
and narrow band pass filters have been suggested over the
range (1300-1800 nm.) within infrared (IR) region to use in
modern optical laser system. These design based on quarterwave
stack, for the numerical calculation, we used glass as the
substrate, Zinc sulfide (ZnS) as and Cryolite ( Na3AlF6) as
high and low refractive index respectively. For the normal
incidence at the wavelength design 1550 nm, the results shows
that the transmittance for the suggested design, (A / (HL)
(HH)(LH) L(HL) (HH)(LH) / S), was (99.18 ). Also the
number of order and the effect of incidence angle were
investigated. The results shows when the number of order
increase, the transmittance increase and the full width at half
maximum decreases, while when the angle of incidence
increase the transmittance will decreases with shifting of
wavelength design toward shorter wavelengths of
electromagnetic spectrum.
تاريخ النشر
04/01/2015
الناشر
International Journal of Emerging Trends & Technology in Computer Science
سعيد الراشد | Saeed AlRashid | 4537