E. Clinton, M. Poirier, A. Scott, D. Touahri, S. Ilias, R. Doyon "Design and fabrication of large spectral waveband mirror coatings for scanning Fabry-Perot etalons" Proc. of SPIE, 7067, art. no. 706703, 2008
Abstract: Earlier publications described a novel approach to the design of mirror coatings for scanning Fabry Perot etalons. Since that time, we have extended the design process, fabricated mirror coatings and used them to build etalons. One design process improvement is the minimization of off-axis de-tuning. It can be significantly worse with a real mirror coating than the normal "blue shift" associated with the basic Fabry-Perot geometry. This option provides for the control of de-tuning in optimization. Another improvement is optimization for multiple-order operation of the etalon. This technique reduces etalon mirror travel while allowing tunability over a broad spectral range. The focus of this paper, however, is the experimental results obtained for coatings and etalons built for the Fine Guidance Sensor-Tunable Filter Imager (FGS-TFI) - a Canadian Space Agency funded science instrument for the James Web Space Telescope (JWST). We present measured data for both the coating and the etalon performance.
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