Fiber optic synthetic aperture interferometer

Details Fiber optic synthetic aperture interferometer Fiber optic synthetic aperture interferometer

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990optr.rept.....h&link_type=abstract

Final Technical Report, Aug. 1987 - Mar. 1990 OPTRA, Inc., Beverly, MA.

Physics

Optics

Astronomy, Atmospheric Circulation, Fiber Optics, Glass Fibers, Interferometers, Lasers, Length, Optical Communication, Synthetic Apertures, Telescopes, Data Links, Diameters, Light Sources, Modules, Portable Equipment, Stars

Scientific paper

This report describes a Fiber Optic Stellar Interferometer built by Optra, Inc. for the purposes of (1) measuring stellar diameters using a pair of small portable telescopes (rather than a large observatory telescope), and (2) measuring atmospheric turbulence. The key element of this concept is the use of singlemode optical fibers to link the separate small telescopes with the interferometer module. We have shown that the proposed turbulence measurements are entirely feasible using a distant light source (preferably a laser). The demonstration of the ability to obtain white light fringes through the fibers was not successful. We believe that this is due to a mismatch in the lengths of the fibers, and we have proposed a simple and flexible solution to this problem.

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