Coherent optical beam forming with passive millimeter-wave arrays

Autor:	Alan H. Greenaway, Paul M. Blanchard, Andrew R. Harvey, Ken Webster
Rok vydání:	1999
Předmět:	Physics business.industry Phased array Aperture synthesis Antenna aperture Astrophysics::Instrumentation and Methods for Astrophysics Image processing Atomic and Molecular Physics and Optics Optics Optical modulator Light beam Angular resolution business Image resolution
Zdroj:	Journal of Lightwave Technology. 17:418-425
ISSN:	0733-8724
DOI:	10.1109/50.749381
Popis:	Passive millimeter-wave imaging requires large apertures to achieve an angular resolution comparable to that of typical infrared imagers. Aperture synthesis offers a route to achieving high resolution without using a single large aperture, by interferometrically combining the signals from a number of smaller distributed apertures. In such a system the individual millimeter-wave signals must be transported to a common location with good phase fidelity and combined to form the image. This paper discusses a technique called coherent optical beam forming which performs optical transport of the up-converted millimeter-wave signal and direct image formation at the optical frequency. Proof of principle experiments are described that demonstrate coherent optical beam forming with a point source and a method of self-calibrating the array to remove phase errors.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bc54a8159acd96fbc943d986d34e256d https://doi.org/10.1109/50.749381 Zobrazit plný text záznamu