8 December 2004 Continuous-wave THz generation through photomixing using a dual-frequency Yb3+:KGd(WO4)2 laser
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Abstract
We demonstrate a high-spectral-purity continuous-wave terahertz source, using a diode pumped Yb3+:KGd(WO4)2 dual frequency laser. THz radiation is generated by photomixing the two frequencies in a low temperature grown In:25Ga:75As photoconductor loading a dipole antenna. The frequency difference between the two optical modes is tuneable by step from d.c. to 3.1 THz. A maximum optical output power of 120 mW CW has been obtained with a beatnote-linewidth narrower than 30 kHz. Preliminary measurements show a tunable THz emission with a maximum output power in the order of a few tens of nW.
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Romain Czarny, Medhi Alouini, Christian Larat, Sukhdeep Dhillon, Michel M. Krakowski, Shailendra Bansropun, Valentin Ortiz, Carlo Sirtori, Bruno Gerard, Daniel Dolfi, "Continuous-wave THz generation through photomixing using a dual-frequency Yb3+:KGd(WO4)2 laser", Proc. SPIE 5619, Passive Millimetre-Wave and Terahertz Imaging and Technology, (8 December 2004); doi: 10.1117/12.581285; https://doi.org/10.1117/12.581285
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