Photonic crystalline IR fibers for the spectral range of 2-40 μm

Abstract

Monocrystals of Ag<inf>1-x</inf>Tl<inf>x</inf>Br<inf>1-x</inf>I<inf>x</inf> and Ag<inf>1-x</inf>Tl<inf>x</inf>ClyIzBr<inf>1-y-z</inf> for the spectral range from 2.0 to 40.0 μm with improved photostability were developed and grown. The grown crystals were used for fabrication of single-mode IR fibers. Experimental studies of optical properties of these fibers have confirmed their single-mode operation at CO<inf>2</inf> laser wavelength and demonstrated wider mode field for microstructured fiber compared to fibers with conventional double-layered structure. © 2012 Optical Society of America.