Generation of 100-kW pulsed far-infrared laser at 50 μm
演讲课题：Generation of 100-kW pulsed far-infrared laser at 50 μm
演讲人：Yen-Chieh Huang
演讲摘要：
In the far-infrared spectrum between 30-100 m, free-electron laser is the only wavelength-tunable coherent radiation source capable of generating kW-level power with a linewidth of the order of 1 percent. Here, we report the detection of 62-kW radiation power at about 53 m in units of wavelength from a KTP off-axis THz parametric oscillator, when pumping it with 13.7-mJ energy in a 450-ps pulse from a single-frequency Nd:YAG laser and seeding it with a 7-μJ, 40-GHz-linewidth Stokes pulse from asynchronously pumped KTPTHz parametric generator. When limiting the radiation linewidth to 1.4X10-3, we measured 44-kW power at 5.7 THz in a 87-ps pulse width. With 63% coupling efficiency of the silicon-prism coupler atop the KTP crystal, the measured 62- and 44-kW far-infrared radiation correspond to 98- and 70-kW powers emitted from the seeded KTP off-axis THz parametric oscillator.
