Design of a three-telescope interferometer using a multimode interference waveguide

Frederic Rooms; Alain Morand; Isabelle Schanen-Duport; Jean-Philippe Berger; Pierre Benech

doi:10.1117/12.431634

18 June 2002 Design of a three telescope interferometers using a multimode interference waveguide

Frederic Rooms, Alain Morand, Isabelle Schanen-Duport, Jean-Philippe Berger, Pierre Benech

Proceedings Volume 4640, Integrated Optics: Devices, Materials, and Technologies VI; (2002) https://doi.org/10.1117/12.431634
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States

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.

Citation Download Citation

Frederic Rooms, Alain Morand, Isabelle Schanen-Duport, Jean-Philippe Berger, and Pierre Benech "Design of a three telescope interferometers using a multimode interference waveguide", Proc. SPIE 4640, Integrated Optics: Devices, Materials, and Technologies VI, (18 June 2002); https://doi.org/10.1117/12.431634

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