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21 November 2017 Spectral behavior of integrated optics asymmetric y-junction used for optimizing a planar optics telescope beam combiner
Isabelle Schanen-Duport, Dominique Persegol, Virginie Collomb, Vincent Minier, Pierre Haguenauer
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Proceedings Volume 10569, International Conference on Space Optics — ICSO 2000; 105691D (2017) https://doi.org/10.1117/12.2307933
Event: International Conference on Space Optics 2000, 2000, Toulouse Labège, France
Abstract
Astronomical aperture synthesis requires to combine beams coming from telescopes, with constraints on mechanical and thermal stability, accuracy on the measurement of the interferences visibility. One adapted way for solving the problem is integrated planar optics. A first two telescope beam combiner made by ion exchange technique on glass substrate and build with symmetric Y-junction provides laboratory white light interferograms simultaneously with photometric calibration. In order to increase the interferometric signal without loss of photometric output, we propose to replace symmetric Y-junctions by asymmetric ones. In this paper, we report the conception, the manufacturing and the characterization of asymmetric Y-junction realized by ion exchange on glass substrate. The specific application of astronomical interferometry required the characterization of such component in term of spectral behavior, so we report the simulation and the measurement of asymmetric Y-junction response versus wavelength.
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Isabelle Schanen-Duport, Dominique Persegol, Virginie Collomb, Vincent Minier, and Pierre Haguenauer "Spectral behavior of integrated optics asymmetric y-junction used for optimizing a planar optics telescope beam combiner", Proc. SPIE 10569, International Conference on Space Optics — ICSO 2000, 105691D (21 November 2017); https://doi.org/10.1117/12.2307933
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KEYWORDS
Waveguides
Integrated optics
Glasses
Ion exchange
Telescopes
Ions
Near field
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