Down-converters with doped solid solution crystals GaSe1-xSx for THz spectrometry

Z.-M. Huang; J.-G. Huang; Y.-Q. Gao; Q.-J. Yang; Yu. M. Andreev; K. A. Kokh; G. V. Lanskii; A. A. Lisenko; V. A. Svetlichnyi

doi:10.1117/12.2268341

12 May 2017 Down-converters with doped solid solution crystals GaSe_1-xS_x for THz spectrometry

Z.-M. Huang, J.-G. Huang, Y.-Q. Gao, Q.-J. Yang, Yu. M. Andreev, K. A. Kokh, G. V. Lanskii, A. A. Lisenko, V. A. Svetlichnyi

Author Affiliations +

Proceedings Volume 10173, Fourth International Symposium on Laser Interaction with Matter; 101731W (2017) https://doi.org/10.1117/12.2268341
Event: 4th International Symposium on Laser Interaction with Matter, 2016, Chengdu, China

Abstract

We launched into a development of a new stand-off sensing system that can detect atmospheric and hazardous gases in real atmosphere utilizing THz technology. Narrow line width, <0.1 cm^-1, long-wave (mid-IR and THz) source based on difference frequency generation (DFG) in collinear configuration in GaSe_0.91S_0.09:Al(0.03 at. %) using seeded YAG laser and KTP OPO as pump sources was designed. The low optical loss coefficient and large hardness, together with the simplicity of the processing, make GaSe_0.91S_0.09:Al(0.03 at. %) as a high-reliable and effective THz-wave generator suitable for out-of-door application. We demonstrate incoherent terahertz wave detection by stand-off room temperature Schottky diodes located at over 110 m using open waveguide formed by multitude HPE lenses, mirrors and/or unpolished reflectors.

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Z.-M. Huang, J.-G. Huang, Y.-Q. Gao, Q.-J. Yang, Yu. M. Andreev, K. A. Kokh, G. V. Lanskii, A. A. Lisenko, and V. A. Svetlichnyi "Down-converters with doped solid solution crystals GaSe_1-xS_x for THz spectrometry", Proc. SPIE 10173, Fourth International Symposium on Laser Interaction with Matter, 101731W (12 May 2017); https://doi.org/10.1117/12.2268341

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