Integrated optics for astronomical interferometry. V. Extension to the K band

Details Integrated optics for astronomical interferometry. V. Extension to the K band Integrated optics for astronomical interferometry. V. Extension to the K band

Aug 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...390.1171l&link_type=abstract

Astronomy and Astrophysics, v.390, p.1171-1176 (2002)

Astronomy and Astrophysics

Astrophysics

11

Techniques: Interferometric

Scientific paper

We report laboratory and on sky characterizations of planar integrated optics beam combiners in the K ([2.0 mu m; 2.4 mu m]) and K' ([2.02 mu m; 2.30 mu m]) bands. Because of the strong scientific interests of the K band, we have extended the integrated optics technologies available in the telecom range (i.e. at 0.8 mu m, 1.3 mu m and 1.5 mu m) to 2.0-2.5 mu m. Ion exchange components optimized for these atmospheric bands provide stable contrasts higher than 95% with a laboratory white-light source and global throughputs of 35% in this spectral range. These results are completed with first stellar interferograms obtained with a silica-on-silicon two-way beam combiner on the IOTA interferometer. We characterized in the H and K bands the throughput of this beam combiner optimized for the H band ([1.47 mu m; 1.78 mu m]). On-sky fringes obtained on iota Aur in the H and K' bands clearly demonstrate a high instrumental contrast (larger than 50%) in both bands. This shows that integrated optics works with high performance outside its usual wavelength domain and provides good solutions for astronomical interferometry in a large wavelength range. We have measured single-mode ranges over 1 mu m on our components which would allow to observe in two spectral bands simultaneously or to integrate both metrology reference and science signals in a single chip for astrometric applications.

Affiliated with

Also associated with

No associations

Rating

Integrated optics for astronomical interferometry. V. Extension to the K band does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Integrated optics for astronomical interferometry. V. Extension to the K band, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Integrated optics for astronomical interferometry. V. Extension to the K band will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1673061