Absorption measurements on silver bromide crystals and fibers in the infrared

The absorption coefficients of single crystals of silver bromide, deformed crystals and polycrystalline fibers, extruded from single crystals, were measured by laser calorimetry. The measurements were carried out at three wavelengths in the near-infrared and middle-infrared ranges. The absorption coefficients of the fibers were higher than the coefficients of the crystals and deformed crystals, over the entire spectral range. We suggest that this absorption is due to the weak absorption tail. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4789633]