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Proceedings Paper

Design of a three-telescope interferometer using a multimode interference waveguide
Author(s): Frederic Rooms; Alain Morand; Isabelle Schanen-Duport; Jean-Philippe Berger; Pierre Benech
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Paper Abstract

In order to observe smaller stellar objects, interferometric techniques are used. We propose a new recombiner for three telescopes realised by ion-exchanged on glass (K+/Na+) using a self-imaging multimode waveguide. The first part of this work consists of a theoretical study. We demonstrate that such a component is feasible even if the guided modes are weakly confined. To achieve this goal, we use three different modelling methods: Finite Difference Beam Propagation Method, Guided Modes Analysis and Radiated Modes Analysis. Each of these methods gives different information and permits to design a recombiner fulfilling the astronomical exigencies. The emphasis is put on excess losses, spatial filtering and polarization dependency. After this demonstration, results obtained with a first component used as a power splitter are presented. We conclude by presenting the remaining work.

Paper Details

Date Published: 18 June 2002
PDF: 9 pages
Proc. SPIE 4640, Integrated Optics: Devices, Materials, and Technologies VI, (18 June 2002); doi: 10.1117/12.431634
Show Author Affiliations
Frederic Rooms
Alain Morand
Isabelle Schanen-Duport


Published in SPIE Proceedings Vol. 4640:
Integrated Optics: Devices, Materials, and Technologies VI
Yakov S. Sidorin; Ari Tervonen, Editor(s)

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