Yu. N. Konoplev

Optimization of the structure of an optical fiber polarizer with a metal film at a wavelength of 980 nm

The dependence of the extinction ratio of a 980-nm fiber polarizer with an Al film on the thickness of magnesium fluoride buffer layer has been experimentally and theoretically investigated. At the optimal thickness of the buffer layer, hb = 0.078 (normalized to the wavelength), extinction ratios of 23 and 41 dB were obtained for polarizers having fiber shell residual layers of 2.01 and 1.607 μm, respectively. The optimal thin-film structure is determined, which will make it possible to design polarizers with extinction ratios up to 100 dB.

A 50% Beam Splitter for s -Polarized Light in the 700- to 900-nm Range

A 50/50 beam splitter for s-polarized light in the 700-to 900-nm range on the basis of refractory oxides was synthesized and studied.