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Proceedings Paper

Photomixer systems as submillimeter oscillators and coherent test sources
Author(s): John C. Pearson; Pin Chen; Herbert M. Pickett
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Paper Abstract

The development of widely tunable coherent frequency sources for application as local oscillators or simply as test equipment above 1 THz remains an impediment in receiver development and characterization. Photomixer sources have demonstrated sufficient power to pump SIS mixers to over 600 GHz and have demonstrated over 2.5 THz of bandwidth in a single device. First generation photomixer system solved the problem of frequency calibration, but failed to fully address the needed spectral purity required for heterodyne applications. A number of improved laser technologies are greatly simplifying the implementation and improving the spectral purity of photomixer systems, however a full system demonstration in the THz frequency range remains elusive. The current state of the art for photomixer based sources is explored in light of heterodyne local oscillator and coherent tests sources for antenna and component characterization at THz frequencies.

Paper Details

Date Published: 17 February 2003
PDF: 9 pages
Proc. SPIE 4855, Millimeter and Submillimeter Detectors for Astronomy, (17 February 2003); doi: 10.1117/12.459378
Show Author Affiliations
John C. Pearson, Jet Propulsion Lab. (United States)
Pin Chen, Jet Propulsion Lab. (United States)
Herbert M. Pickett, Jet Propulsion Lab. (United States)


Published in SPIE Proceedings Vol. 4855:
Millimeter and Submillimeter Detectors for Astronomy
Thomas G. Phillips; Jonas Zmuidzinas, Editor(s)

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