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Proceedings Paper

Experiments with the fiber-connected interferometer for the MIRA project
Author(s): Koichi Sato; Jun Nishikawa; Masanori Yoshizawa; Toshio Fukushima; Yasuo Torii; Ko Matsuda; Koichi Kubo; Hikaru Iwashita; Shunsaku Suzuki; David Saint-Jacques
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Paper Abstract

Fiber optics is useful for connecting the element telescopes of a long-baseline interferometer. Experiments with a fiber- connected interferometer are carried out as a part of MIRA- I.2 interferometer under construction. MIRA-I.2 is an interferometer consisting of two 300 mm siderostats which are placed on a 30 m south-north baseline. For this baseline, it is necessary to use fibers of about 100 m long. Fiber optics will be essential for the interferometric connection of large telescopes, such as Subaru, Gemini, and Keck on the summit of Mauna Kea. In this case, fiber length of about 1 km is needed. We achieved white light fringes using 10 m and 100 m fibers. With the 10 m fiber, visibility of 0.7 was achieved for both He-Ne laser and white light sources. Visibility of 0.7 for white light was obtained by compensating the dispersion effect of fiber with glass plates. Experiments will be extended to longer fibers such as 1000 m.

Paper Details

Date Published: 5 July 2000
PDF: 5 pages
Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); doi: 10.1117/12.390192
Show Author Affiliations
Koichi Sato, National Astronomical Observatory (Japan)
Jun Nishikawa, National Astronomical Observatory (Japan)
Masanori Yoshizawa, National Astronomical Observatory (Japan)
Toshio Fukushima, National Astronomical Observatory (Japan)
Yasuo Torii, National Astronomical Observatory (Japan)
Ko Matsuda, National Astronomical Observatory (Japan)
Koichi Kubo, National Astronomical Observatory (Japan)
Hikaru Iwashita, National Astronomical Observatory (Japan)
Shunsaku Suzuki, National Astronomical Observatory (Japan)
David Saint-Jacques, National Astronomical Observatory (Canada)

Published in SPIE Proceedings Vol. 4006:
Interferometry in Optical Astronomy
Pierre J. Lena; Andreas Quirrenbach, Editor(s)

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