A1 Refereed original research article in a scientific journal
Modulation depth of Michelson interferometer with Gaussian beam
Authors: Tuomas Välikylä, Jyrki Kauppinen
Publisher: Optical Society of America
Publication year: 2011
Journal: Applied Optics
Number in series: 36
Volume: 50
Issue: 56
First page : 6671
Last page: 6677
Number of pages: 7
ISSN: 1559-128X
eISSN: 2155-3165
DOI: https://doi.org/10.1364/AO.50.006671(external)
Web address : http://dx.doi.org/10.1364/AO.50.006671(external)
Abstract
rror misalignment or the tilt angle of the Michelson interferometer can be estimated from the modulation depth measured with collimated monochromatic light. The intensity of the light beam is usually assumed to be uniform, but, for example, with gas lasers it generally has a Gaussian distribution, which makes the modulation depth less sensitive to the tilt angle. With this assumption, the tilt angle may be underestimated by about 50%. We have derived a mathematical model for modulation depth with a circular aperture and Gaussian beam. The model reduces the error of the tilt angle estimate to below 1%. The results of the model have been verified experimentally.
rror misalignment or the tilt angle of the Michelson interferometer can be estimated from the modulation depth measured with collimated monochromatic light. The intensity of the light beam is usually assumed to be uniform, but, for example, with gas lasers it generally has a Gaussian distribution, which makes the modulation depth less sensitive to the tilt angle. With this assumption, the tilt angle may be underestimated by about 50%. We have derived a mathematical model for modulation depth with a circular aperture and Gaussian beam. The model reduces the error of the tilt angle estimate to below 1%. The results of the model have been verified experimentally.
UTU Research Portal