Note: Coherent detection of terahertz radiation employing a continuous wave optical parametric source |
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Authors: | Kiessling Jens Sowade Rosita Mayorga Iván Cámara Buse Karsten Breunig Ingo |
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Affiliation: | Institute of Physics, University of Bonn, Bonn, Germany. jenkie@uni-bonn.de |
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Abstract: | The combination of an all-optical terahertz source with a photoconductive antenna to achieve coherent detection is presented. This approach aims to overcome the frequency limits introduced by optoelectronic terahertz sources commonly used. Here the Gaussian-shaped and linearly polarized terahertz waves are generated by a continuous wave optical parametric oscillator with a power of 3 μW at 1.4 THz. The infrared signal light of the optical parametric oscillator can be used to coherently detect the generated terahertz wave with a photoconductive antenna. As a proof-of-principle experiment we determine the thickness profile of a plastic lens using phase shifting interferometry. |
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