Using oxide nonlinear crystals to convert frequencies to the THz range

A study is performed of using such oxide nonlinear crystals as beta barium borate, lithium triborate, and lithium tetraborate to create powerful sources of terahertz radiation that work in windows of atmospheric transparency. It is shown that in terms of combined properties, such oxide crystals can provide greater efficiency and power output in the terahertz range than the widely used semiconductor and organic crystals.