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Proceedings Paper

Continuous-wave optical parametric source for terahertz waves tunable from 1 to 4.5 THz frequency
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Paper Abstract

We demonstrate the continuous-wave operation of a cascade that has been successfully applied so far only for picosecond systems: A doubly-resonant optical-parametric oscillator (OPO) based on lithium niobate generates signal and idler waves close to degeneracy. Subsequently, these two light fields are converted to a terahertz wave via difference frequency mixing in an orientation-patterned gallium arsenide crystal placed inside the OPO cavity. Using this scheme, we achieved tunability from 1 to 4:5 THz frequency, a linewidth smaller than 10 MHz, and a Gaussian beam profile. The output power is of the order of tens of μW, with a scalability into the milliwatt regime.

Paper Details

Date Published: 20 February 2014
PDF: 8 pages
Proc. SPIE 8964, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIII, 896408 (20 February 2014); doi: 10.1117/12.2041915
Show Author Affiliations
Jens Kießling, Fraunhofer-Institut für Physikalische Messtechnik (Germany)
Karsten Buse, Fraunhofer-Institut für Physikalische Messtechnik (Germany)
Univ. of Freiburg (Germany)
Konstantin L. Vodopyanov, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Ingo Breunig, Univ. Freiburg (Germany)

Published in SPIE Proceedings Vol. 8964:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIII
Konstantin L. Vodopyanov, Editor(s)

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