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Proceedings Paper

Integrated optic beam combiners in lithium niobate for stellar interferometer
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Paper Abstract

Integrated optics can provide compact and robust solutions for ground and space-based interferometry by integrating optical devices with different functionalities, such as spatial filters, combiners/nullers, and phase modulators, on a single chip. Lithium niobate (LiNbO3) has two distinct advantages over silica-based technologies, including good transparency further into the near-infrared (covering J, H, K, and L bands) and the ability to support electrically-controlled phase modulation through the linear electro-optic (EO) effect. The design, fabrication and preliminary tests of integrated optic components on LiNbO3 substrates for astronomical beam combiners operating in the H and L bands is reported. The components include single-mode waveguides of sufficient length for spatial filtering, symmetric junctions for wavelength insensitive power splitters/combiners, and electro-optic waveguide modulators for path-length control.

Paper Details

Date Published: 28 June 2006
PDF: 5 pages
Proc. SPIE 6268, Advances in Stellar Interferometry, 626834 (28 June 2006); doi: 10.1117/12.671628
Show Author Affiliations
Guangyu Li, Univ. of Michigan (United States)
Tobias Eckhause, Univ. of Michigan (United States)
Kim A. Winick, Univ. of Michigan (United States)
John D. Monnier, Univ. of Michigan (United States)
Jean-Philippe Berger, Lab. d'Astrophysique, CNRS, Observatoire de Grenoble (France)

Published in SPIE Proceedings Vol. 6268:
Advances in Stellar Interferometry
John D. Monnier; Markus Schöller; William C. Danchi, Editor(s)

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