Characterization of the differential dispersion in a kilometric silica fiber stellar interferometer

Guillaume Huss; Laurent Delage; Emmanuel Longueteau; Francois Reynaud

doi:10.1117/12.457131

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21 February 2003 Characterization of the differential chromatic dispersion in a kilometric silica fiber stellar interferometer

Guillaume Huss, Laurent Delage, Emmanuel Longueteau, Francois Reynaud

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Proceedings Volume 4838, Interferometry for Optical Astronomy II; (2003) https://doi.org/10.1117/12.457131
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

We describe a preliminary experimental study of an interferometer built with two 500-meters-long arms made of polarization maintaining optical fibers. The control of the field polarization state along the single-mode fiber arms enables to measure fringe contrast up to 93% with a laser source emitting a 1290nm carrier wavelength. Preliminary contrast measurements achieved with broadband spectrum sources exhibit differential dispersion effect resulting from fiber inhomogeneities. Partial compensation of this effect is achieved by introducing additional fiber pieces on one arm. Moreover, we experimentally characterize the differential chromatic dispersion evolution as a function of the various additional fiber sections. Using the channeled spectrum method, a spectral analysis of the interferometric mixing allows to accurately measure the differential effect of chromatic dispersion i.e. second and third order term of the spectral phase shift.

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Guillaume Huss, Laurent Delage, Emmanuel Longueteau, and Francois Reynaud "Characterization of the differential chromatic dispersion in a kilometric silica fiber stellar interferometer", Proc. SPIE 4838, Interferometry for Optical Astronomy II, (21 February 2003); https://doi.org/10.1117/12.457131

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