| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1537198 | Optics Communications | 2010 | 5 Pages |
Abstract
A compact, walk-off compensated dual-wavelength KTP OPO near the degenerate point of 2.128 μm pumped by a Nd:YAG pulsed laser is employed as the pump for terahertz (THz) source based on difference frequency generation (DFG) in a GaSe crystal. Coherent THz radiation that is continuously tunable in the range of 81–1617 μm (0.186–3.7 THz) is achieved. An enhancement of 76.7% in average for the THz energies at different wavelengths is realized using the walk-off compensated KTP OPO than the common one. Using a 8 mm-long GaSe crystal, the maximum output THz pulse energy is 48.9 nJ with the peak power of 11 W, corresponding to the energy conversion efficiency of 5.4 × 10− 6 and the photon conversion efficiency of about 0.09%.
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Electronic, Optical and Magnetic Materials
Authors
Kai Zhong, Jianquan Yao, Degang Xu, Zhuo Wang, Zhongyang Li, Huiyun Zhang, Peng Wang,