Abstract

The parameters necessary for equidistant equal-time optimum operation of a Fabry-Perot spectrometer with a spherical etalon have been determined. For least uncertainty determinations of winds (temperatures) the etalon normalized width a⁺ is 0.072 (0.035); the normalized source width dg⁺ is 0.16 (0.11), and the normalized etalon aperture f⁺ is 0.14 (0.065). The corresponding reflectivity and finesse are 0.80 (0.89) and 14.0 (28.6), respectively. From these results, a gain factor for a spherical etalon spectrometer, relative to a plane etalon spectrometer, has been found to be G ≃ 4.75d_s²D⁻², where d_s is the gap of the spherical etalon, and D is the diameter of the plane etalon. Thus a spherical etalon spectrometer with a gap ≥6.87 cm is a more powerful spectrometer than a plane etalon device with a 15-cm diam aperture.

© 1985 Optical Society of America

Analytical description of a Fabry-Perot spectrometer. 8: Optimum operation with equidistant equal-noise sampling

G. Hernandez
Appl. Opt. 24(15) 2442-2449 (1985)

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G. Hernandez
Appl. Opt. 21(3) 507-513 (1982)

Analytical description of a Fabry-Perot spectrometer 6: Minimum number of samples required in the determination of Doppler widths and shifts

G. Hernandez
Appl. Opt. 21(9) 1695-1698 (1982)

Fabry-Perot with an absorbing etalon cavity

G. Hernandez
Appl. Opt. 24(18) 3062-3067 (1985)

Analytical description of an imperfect Fabry-Perot etalon

Ivan Prikryl
Appl. Opt. 23(4) 621-627 (1984)