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magnesium-fluoride
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Novel in-line effective fiber polarizer based on chromium and gold nano metal films: design and experiment
, Article Laser Physics ; Volume 27, Issue 1 , 2017 ; 1054660X (ISSN) ; Panahi, O ; Malekmohamadi, S ; Mousavi, M ; Mardiha, M ; Kheyrollahi, M ; Sharif University of Technology
Abstract
The performance of the magnesium fluoride/chromium/gold in-line fiber optic polarizer on the thickness of magnesium fluoride buffer layer and chromium metal thin film was theoretically investigated. To prove the theoretical study, the magnesium fluoride/chromium/gold polarizer was made based on the simulation results. The obtained polarizer showed an extinction ratio of about 40 dB which is in a good agreement with the theoretical result at the corresponding thicknesses. Both theoretical and experimental results showed that by covering the side polished single mode fiber with the optimum layer thicknesses, a novel and an efficient fiber polarizer with the high extinction ratio could be...
The dependency of optical properties on density for hot pressed MgF2
, Article Infrared Physics and Technology ; Volume 51, Issue 6 , 2008 , Pages 546-549 ; 13504495 (ISSN) ; Madaah Hosseini, H. R ; Asghari Shivaee, H ; Sharif University of Technology
2008
Abstract
The effects of the most important parameters of hot pressing, including temperature, time and pressure on densification, microstructure and infrared transparency of MgF2 ceramics are discussed. The results show that the absorption or scattering of incident radiation is strongly dependent on the amount of porosity. By increasing the temperature or the pressure, transparency at infrared wavelengths has been increased due to the rise in density. For the longer hot pressing times, a continuous increase in density and infrared transparency has been seen as well. Cold pressing before hot press has minor effects on the density and infrared transparency of MgF2. © 2008 Elsevier B.V. All rights...