 Far-infrared laser

Far-infrared laser or terahertz laser (FIR laser, THz laser) is a laser with output wavelength in between 30-1000 µm (frequency 0.3-10 THz), in the far infrared or terahertz frequency band of the electromagnetic spectrum.FIR lasers have application in terahertz spectroscopy, terahertz imaging as well in fusion plasma physics diagnostics.