Optical generation of Terahertz based on all fiber highly coherent optical parametric light source

Narrow band Terahertz generation based on an all fiber, highly coherent pump light source derived from fiber optical parametric process is reported. A pair of phase conjugated beams with high coherence and narrow bandwidth are generated via all fiber parametric process as the seed light. The amplified highly coherent light beam is injected into DSTMS to stimulate the emission of Terahertz radiation. A terahertz wave with the frequency of 1.25 THz and linewidth less than 512 MHz is generated.