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SMART precision interferometry at 794 nm

Monnier, J. D. and Berger, J.-P. and Millan-Gabet, R. and Traub, W. A. and Carleton, N. P. and Pedretti, E. and Coldwell, C. M. and Papaliolios, C. D. (2003) SMART precision interferometry at 794 nm. In: Interferometry for Optical Astronomy II. Proceedings of SPIE. No.4838. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 1127-1138. ISBN 0819446173.

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Single-mode fibers have been used in the near-infrared to dramatically reduce calibration error for long-baseline interferometry. We have begun an effort to apply the advantages of spatial filtering at visible wavelengths for precision measurements of pulsating Cepheids using the IOTA interferometer. Rather than employing photometric taps to calibrate fluctuating coupling efficiency, we are using an "asymmetric" coupler which allows this calibration to be done without losing photons. The Single-Mode Asymmetric Recombination Technique (SMART) experiment has finished lab-testing, and has been installed at IOTA for full commissioning in Summer 2002. We report the results of lab characterization and first sky tests, as well as first fringes on a star using a visible-wavelength single-mode coupler. With both lab and sky experience using unpolarized light, we have found that circular silica fibers are quite practical for precision interferometric measurements. We conclude that circular fibers (as opposed to polarization maintaining fibers) have an undeserved poor reputation and that birefringence effects pose no significant difficulty.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Monnier, J. D.0000-0002-3380-3307
Berger, J.-P.0000-0001-5025-0428
Millan-Gabet, R.0000-0003-0447-5866
Additional Information:© 2003 Society of Photo-Optical Instrumentation Engineers (SPIE). We thank J, Prohaska and the Center for Advanced Fiberoptic Applications for use of a spectrometer. JDM acknowledges the support of a Harvard-Smithsonian Center for Astrophysics Fellowship.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Harvard-Smithsonian Center for AstrophysicsUNSPECIFIED
Subject Keywords:Fiber Optics, Optical Interferometry, Cepheids, Spatial Filtering
Series Name:Proceedings of SPIE
Issue or Number:4838
Record Number:CaltechAUTHORS:20180719-112810041
Persistent URL:
Official Citation:John D. Monnier, Jean-Philippe Berger, Rafael Millan-Gabet, Wesley A. Traub, Nathaniel P. Carleton, Ettore Pedretti, Charles M. Coldwell, Costas D. Papaliolios, "SMART precision interferometry at 794 nm", Proc. SPIE 4838, Interferometry for Optical Astronomy II, (21 February 2003); doi: 10.1117/12.459696;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88002
Deposited By: George Porter
Deposited On:19 Jul 2018 20:39
Last Modified:16 Nov 2021 00:22

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