Hanot, C. and Mawet, D. and Loicq, J. and Vandormael, D. and Plesseria, J. Y. and Surdej, J. and Habraken, S. (2007) Fresnel Rhombs as Achromatic Phase Shifters for Infrared Nulling Interferometry: First experimental results. In: Techniques and Instrumentation for Detection of Exoplanets Ill. Proceedings of SPIE. No.6693. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 66931L. ISBN 9780819468413. https://resolver.caltech.edu/CaltechAUTHORS:20150527-090016715
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Abstract
One of the most critical units of nulling interferometers is the Achromatic Phase Shifter. The concept we propose here is based on optimized Fresnel rhombs, using the total internal reflection phenomenon, modulated or not. The total internal reflection induces a phase shift between the polarization components of the incident light. We present the principles, the current status of the prototype manufacturing and testing operations, as well as preliminary experiments on a ZnSe Fresnel rhomb in the visible that have led to a first error source assessment study. Thanks to these first experimental results using a simple polarimeter arrangement, we have identified the bulk scattering as being the main error source. Fortunately, we have experimentally verified that the scattering can be mitigated using spatial filters and does not decrease the phase shifting capabilities of the ZnSe Fresnel rhomb.
Item Type: | Book Section | ||||||
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Additional Information: | © 2007 Society of Photo-Optical Instrumentation Engineers (SPIE). September 19, 2007. The authors acknowledge the financial support of ESA and of the Euro Space Society. | ||||||
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Subject Keywords: | Fresnel Rhomb, Achromatic Phase Shifters, nulling interferometry, subwavelength gratings, Zinc Selenide, bulk scattering | ||||||
Series Name: | Proceedings of SPIE | ||||||
Issue or Number: | 6693 | ||||||
DOI: | 10.1117/12.758405 | ||||||
Record Number: | CaltechAUTHORS:20150527-090016715 | ||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20150527-090016715 | ||||||
Official Citation: | C. Hanot ; D. Mawet ; J. Loicq ; D. Vandormael ; J. Y. Plesseria, et al. "Fresnel rhombs as achromatic phase shifters for infrared nulling interferometry: first experimental results", Proc. SPIE 6693, Techniques and Instrumentation for Detection of Exoplanets III, 66931L (September 19, 2007); doi:10.1117/12.758405 | ||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
ID Code: | 57846 | ||||||
Collection: | CaltechAUTHORS | ||||||
Deposited By: | Ruth Sustaita | ||||||
Deposited On: | 27 May 2015 18:12 | ||||||
Last Modified: | 10 Nov 2021 21:56 |
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