Continuous-wave THz generation through photomixing using a dual-frequency Yb3+:KGd(WO4)2 laser

Romain Czarny; Medhi Alouini; Christian Larat; Sukhdeep Dhillon; Michel M. Krakowski; Shailendra Bansropun; Valentin Ortiz; Carlo Sirtori; Bruno Gerard; Daniel Dolfi

doi:10.1117/12.581285

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8 December 2004 Continuous-wave THz generation through photomixing using a dual-frequency Yb³⁺:KGd(WO₄)₂ laser

Romain Czarny, Medhi Alouini, Christian Larat, Sukhdeep Dhillon, Michel M. Krakowski, Shailendra Bansropun, Valentin Ortiz, Carlo Sirtori, Bruno Gerard, Daniel Dolfi

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Proceedings Volume 5619, Passive Millimetre-Wave and Terahertz Imaging and Technology; (2004) https://doi.org/10.1117/12.581285
Event: European Symposium on Optics and Photonics for Defence and Security, 2004, London, United Kingdom

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, and 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); https://doi.org/10.1117/12.581285

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