Plastic Bragg Cell in far-infrared region

Abstract
Photoacoustic diffraction is first observed in far-infrared (FIR) range. A cell made of TPX (4-methyl-pentene-1) is employed as a Bragg Cell in both visible and FIR regions. It is experimentally demonstrated that the TPX Bragg Cell is a very convenient tool as a plasma simulator in the FIR laser scattering apparatus.