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Effects of Thin Film Multi Layers Thickness and Refractive Index on Narrowband Filters Transmission's | ||
| Albahir journal | ||
| Article 1, Volume 3, Issue 5, 2016, Pages 19-26 | ||
| Author | ||
| Elham Jasim Mohammad | ||
| Abstract | ||
| Abstract Both thickness and refractive index of a multi-layered membrane have a great effect on getting a narrow pulse width. So choosing the coating material should be regarded with accuracy of refractive index. The thickness of multilayer of coating has an important effect on type of multilayered coating material and at the end has a great role on cost control. In this paper we will get analysis and design of different kinds of filters named band-pass filter, by choosing materials for different coating to have less possible narrow pulse width. The 1st design is TiO2/SiO2, 2nd design In GaAs/SiO2 and 3rd design is GaAs/SiO2, each of these designs consists of a number of layers (31) are presented respectively. These designs consist of two materials high/low index with wavelength range from (750-1100) nm and the design wavelength is (900) nm. From this study we get the effect of thickness and refractive index by having the transmission characteristics curve versus wavelength for any type of dielectrics thin film of multilayered membrane. At the end we get optimal design for a narrow laser pulse width. | ||
| Keywords | ||
| Band; pass filter; TiO; InGaAs; GaAs; Narrow laser pulse width | ||
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