Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11003649 | Optics & Laser Technology | 2019 | 5 Pages |
Abstract
A high power gas terahertz laser based on L-shaped cavity was demonstrated. We, for the first time, investigated the output performances of D2O gas 385â¯Î¼m THz laser by optimizing the output coupler transmittance of the L-shaped cavity both in theory and experiment. Under the pump energy of 1.6â¯J, the optimum output coupler transmittance was about 0.78 and the optimum gas pressure was about 500â¯Pa. Up to 8.4â¯mJ pulse energy at 385â¯Î¼m was achieved at output coupler transmittance of 0.8, corresponding to a photon conversion efficiency of 43.7%. Pulse width of 120â¯ns, and beam quality factor M2 of 1.58 were obtained at the highest output energy. In addition, the experimental results are in agreement with the theoretical simulation results.
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Authors
Lijie Geng, Zhifeng Zhang, Ruiliang Zhang, Yusheng Zhai, Yuan Luo, Yuling Su,