Modeling of the fringe shift in multiple beam interference for glass fibers
Hamed, Abdallah;
Abstract
A quadratic model is suggested to describe the fringe shift that occurred due to the
phase variations of uncladded glass fiber introduced between the two plates of the liquid
wedge interferometer. The fringe shift of the phase object is represented in the harmonic
term which appears in the denominator of the Airy distribution formula of Fabry–Perot’s
interferometer. A computer program is written to plot the computed fringe shifts of the
described model.
An experiment is conducted using a liquid wedge interferometer where the fiber of a nearly
quadratic thickness variation is introduced between the two plates of the interferometer.
The obtained fringe shift shows a good agreement with the proposed quadratic model.
Also, it is compared with the previous theoretical shift based on ray optics of semi-circular
shape.
phase variations of uncladded glass fiber introduced between the two plates of the liquid
wedge interferometer. The fringe shift of the phase object is represented in the harmonic
term which appears in the denominator of the Airy distribution formula of Fabry–Perot’s
interferometer. A computer program is written to plot the computed fringe shifts of the
described model.
An experiment is conducted using a liquid wedge interferometer where the fiber of a nearly
quadratic thickness variation is introduced between the two plates of the interferometer.
The obtained fringe shift shows a good agreement with the proposed quadratic model.
Also, it is compared with the previous theoretical shift based on ray optics of semi-circular
shape.
Other data
Title | Modeling of the fringe shift in multiple beam interference for glass fibers | Authors | Hamed, Abdallah | Keywords | Multiple beam interference;laser radiation;computerized images | Issue Date | Apr-2008 | Publisher | Indian Academy of Science | Journal | Pramana - Journal of Physics | Volume | 70 | Issue | 4 | Start page | 643 | End page | 648 |
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