Experimental verification of the properties of a spectroscopic device consisting of two etalons coupled by an afocal system, and which behaves as a high-luminosity single-etalon single-aperture Fabry-Perot spectrometer, has been made. These preliminary results, limited by the available equipment, confirm the predicted theoretical properties of the double-etalon modulator device. As a corollary to this experimental verification, it has been found that successful operation of the device requires very close alignment of the optical axes of the etalons.
© 1988 Optical Society of America
G. Hernandez and F. G. McCormac, "Afocal coupled etalons: experimental confirmation of a high-resolution double-etalon modulator spectrometer," Appl. Opt. 27, 3492-3495 (1988)