Chinese Optics Letters, 2010, 8 (4): 411, Published Online: Apr. 20, 2010
High energy optically pumped NH3 terahertz laser with simple cavity 
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太赫兹 TEA CO2激光器 NH3 140.3070 Infrared and far-infrared lasers 140.4130 Molecular gas lasers 140.6630 Superradiance, superfluorescence
Abstract
A high energy pulsed terahertz (THz) laser is studied experimentally. The laser cavity simply consists of a quartz glass waveguide, a coated GaAs input window, and a crystal quartz output window. NH<sub>3</sub> is filled in the cavity as gain medium, and pumped by an 8-J line-tunable transversely excited atmospheric (TEA) CO<sub>2</sub> laser. When 9R(16) transition acts as the pump line, 55.6-mJ THz radiation (90 \mu m) is obtained at 730-Pa NH<sub>3</sub> pressure. The corresponding conversion efficiency is 13.54%. Energy and optimal pressure of amplified spontaneous emission and laser oscillation are compared.
Liang Miao, Duluo Zuo, Zhixian Jiu, Zuhai Cheng, Chunchao Qi, Junzhu Wu. High energy optically pumped NH3 terahertz laser with simple cavity[J]. Chinese Optics Letters, 2010, 8(4): 411.
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