Volume 106, Number 6, June 2014
|Number of page(s)||5|
|Published online||23 June 2014|
Widely tunable and monochromatic terahertz difference frequency generation with organic crystal DSTMS
1 The Institute of Laser & Optoelectronics, College of Precision Instruments and Opto-electronics Engineering Tianjin University - Tianjin 300072, China
2 Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences - Beijing 100190, China
3 Key Laboratory of Opto-electronics Information Technology (Tianjin University), Ministry of Education Tianjin 300072, China
4 University of Chinese Academy of Sciences - Beijing 100049, China
Received: 15 April 2014
Accepted: 4 June 2014
Widely tunable and monochromatic terahertz (THz) difference frequency generation with organic crystal DSTMS was investigated experimentally. A double-pass KTiOPO4 optical parametric oscillator, pumped by a frequency-doubled Nd:YAG laser, was employed as the source of 1.3-1.6 µm dual wavelength. The THz tuning spectrum covered a range of 0.88−19.27 THz. The dependence of the THz output on the crystal thickness and pump wavelength was studied. The results were well explained based on theoretical calculations. With a pump energy of 2.47 mJ, the output energy reached 85.3 nJ/pulse at 3.80 THz, which corresponded to a peak power of 17.9 W and photon conversion efficiency of 3.6‰.
PACS: 07.57.Hm – Infrared, submillimeter wave, microwave, and radiowave sources / 42.65.Lm – Parametric down conversion and production of entangled photons / 42.70.Mp – Nonlinear optical crystals
© EPLA, 2014
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