Laboratory demonstration of spatial-coherence analysis of a blackbody through an up-conversion interferometer.
In the field of high resolution imaging in astronomy, we experimentally demonstrate the spatial-coherence analysis of a blackbody using an up-conversion interferometer in the photon counting regime. The infrared radiation of the blackbody is converted to a visible one in both arms of the interferometer thanks to the sum-frequency generation processes achieved in Ti-diffused periodically poled lithium niobate waveguides. The coherence analysis is performed through a dedicated imaging stage which mimics a classical telescope array analyzing an astrophysical source. The validity of these measurements is confirmed by the comparison with spatial-coherence analysis through a reference interferometer working at infrared wavelengths.
Xlim, Département Photonique, Université de Limoges, UMR CNRS 7252, 123 Avenue Albert Thomas, 87060 Limoges CEDEX, France.
J-T
JT
Gomes
Xlim, Département Photonique, Université de Limoges, UMR CNRS 7252, 123 Avenue Albert Thomas, 87060 Limoges CEDEX, France.
L
L
Delage
Xlim, Département Photonique, Université de Limoges, UMR CNRS 7252, 123 Avenue Albert Thomas, 87060 Limoges CEDEX, France.
R
R
Baudoin
Xlim, Département Photonique, Université de Limoges, UMR CNRS 7252, 123 Avenue Albert Thomas, 87060 Limoges CEDEX, France.
L
L
Grossard
Xlim, Département Photonique, Université de Limoges, UMR CNRS 7252, 123 Avenue Albert Thomas, 87060 Limoges CEDEX, France.
L
L
Bouyeron
Xlim, Département Photonique, Université de Limoges, UMR CNRS 7252, 123 Avenue Albert Thomas, 87060 Limoges CEDEX, France.
D
D
Ceus
Xlim, Département Photonique, Université de Limoges, UMR CNRS 7252, 123 Avenue Albert Thomas, 87060 Limoges CEDEX, France.
F
F
Reynaud
Universität Paderborn, Angewandte Physik, Warburger Strasse 100-33098 Paderborn, Germany.
H
H
Herrmann
Universität Paderborn, Angewandte Physik, Warburger Strasse 100-33098 Paderborn, Germany.
W
W
Sohler