Combining up to eight telescope beams in a single chip

Details Combining up to eight telescope beams in a single chip Combining up to eight telescope beams in a single chip

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4006..986b&link_type=abstract

Proc. SPIE Vol. 4006, p. 986-995, Interferometry in Optical Astronomy, Pierre J. Lena; Andreas Quirrenbach; Eds.

Astronomy and Astrophysics

Astronomy

5

Scientific paper

In this paper we show that integrated optics offer a very simple and low cost way to combine up to eight beams of an interferometric optical array. These beam combiners will allow accurate visibilities and phase closure terms measurements, and provide consequently, high quality information for astronomical image reconstruction. We present optical designs for two different chips. Using previous laboratory experiments we extrapolate the performances, constraints and limits of different beam combination concepts. In particular spatial encoding and temporal encoding of `all-in-one' schemes are compared and their main properties are evaluated.

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