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Proceedings Paper

Rapid prototyping of integrated sol-gel devices for astronomical interferometry
Author(s): A. Ghasempour; D. Alexandre; C. Brites; P. J. Moreira; F. Reynaud; P. V. S. Marques; A. M. P. Leite; P. J. V. Garcia
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Paper Abstract

Integrated optics is a mature technology with standard applications to telecommunications. Since the pioneering work of Berger et al. 1999 beam combiners for optical interferometry have been built using this technology. Classical integrated optics device production is very expensive and time consuming. The rapid production of devices using hybrid sol-gel materials in conjunction with UV laser direct writing techniques allows overcoming these limitations. In this paper this technology is tested for astronomical applications. We report on the design, fabrication and characterization of multiaxial two beam combiners and a coaxial beam combiner for astronomical interferometry. Different multiaxial two beam combiner designs were tested and high contrast (better than 90%) was obtained with a 1.3 μm laser diode and with an SLD ( λ0 = 1.26 μm, FWHM of 60 nm). High contrast fringes were produced with 1.3 μm laser diode using the coaxial two beam combiner. These results show that hybrid sol-gel techniques produce devices with high quality, allowing the rapid prototyping of new designs and concepts for astronomy.

Paper Details

Date Published: 28 July 2008
PDF: 8 pages
Proc. SPIE 7013, Optical and Infrared Interferometry, 701317 (28 July 2008); doi: 10.1117/12.788845
Show Author Affiliations
A. Ghasempour, INESC Porto (Portugal)
Univ. do Porto (Portugal)
Ctr. de Astrofísica, Univ. do Porto (Portugal)
D. Alexandre, INESC Porto (Portugal)
Univ. do Porto (Portugal)
Univ. de Trás-os-Montes e Alto Douro (Portugal)
C. Brites, INESC Porto (Portugal)
P. J. Moreira, INESC Porto (Portugal)
Ctr. de Astrofísica, Univ. do Porto (Portugal)
F. Reynaud, XLIM, IRO (France)
P. V. S. Marques, INESC Porto (Portugal)
Univ. do Porto (Portugal)
A. M. P. Leite, Univ. do Porto (Portugal)
P. J. V. Garcia, Ctr. de Astrofísica, Univ. do Porto (Portugal)
Univ. do Porto (Portugal)

Published in SPIE Proceedings Vol. 7013:
Optical and Infrared Interferometry
Markus Schöller; William C. Danchi; Françoise Delplancke, Editor(s)

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