Experiments with the fiber-connected interferometer for the MIRA project

Koichi Sato; Jun Nishikawa; Masanori Yoshizawa; Toshio Fukushima; Yasuo Torii; Ko Matsuda; Koichi Kubo; Hikaru Iwashita; Shunsaku Suzuki; David Saint-Jacques

doi:10.1117/12.390192

5 July 2000 Experiments with the fiber-connected interferometer for the MIRA project

Koichi Sato, Jun Nishikawa, Masanori Yoshizawa, Toshio Fukushima, Yasuo Torii, Ko Matsuda, Koichi Kubo, Hikaru Iwashita, Shunsaku Suzuki, David Saint-Jacques

Author Affiliations +

Proceedings Volume 4006, Interferometry in Optical Astronomy; (2000) https://doi.org/10.1117/12.390192
Event: Astronomical Telescopes and Instrumentation, 2000, Munich, Germany

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.

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Koichi Sato, Jun Nishikawa, Masanori Yoshizawa, Toshio Fukushima, Yasuo Torii, Ko Matsuda, Koichi Kubo, Hikaru Iwashita, Shunsaku Suzuki, and David Saint-Jacques "Experiments with the fiber-connected interferometer for the MIRA project", Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); https://doi.org/10.1117/12.390192

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