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Interference between two coherently driven monochromatic terahertz sources

MPS-Authors
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Preu,  S.
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;
International Max Planck Research School, Max Planck Institute for the Science of Light, Max Planck Society;

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Malzer,  S.
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Doehler,  G. H.
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Wang,  L. J.
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Preu, S., Malzer, S., Doehler, G. H., Zhao, Q. Z., Hanson, M., Zimmerman, J. D., et al. (2008). Interference between two coherently driven monochromatic terahertz sources. APPLIED PHYSICS LETTERS, 92(22): 221107. doi:10.1063/1.2938874.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002D-6C9A-F
Abstract
We report the interference between two phase-locked, continuous-wave, and coherent terahertz (Thz) photomixers. Both spatial and temporal coherence are observed with a narrow linewidth of less than 10 MHz. Phase locking is achieved by using one pair of lasers for both sources. The concept of optical narrow linewidth (fiber) distribution of the mixing signal opens various applications. We outline the necessary steps to extend this scheme for very long base line interferometric THz detection in the tens of kilometer range and for the improvement of spatial resolution for active stand-off THz imaging. (C) 2008 American Institute of Physics.