Size measurements of an optical fiber by diffraction pattern analysis in Fraunhofer approximation

2018 ◽  
Author(s):  
Karima Boumrar ◽  
Ali Boukellal ◽  
Pierre Pfeiffer ◽  
Rabah Mokdad
Keyword(s):  
Optical Fiber ◽  
Diffraction Pattern ◽  
Pattern Analysis ◽  
Fraunhofer Approximation

Study of Fraunhofer Diffraction Pattern from a Circular Aperture Using an Optical Fiber Microprobe

2011 ◽  
Vol 378-379 ◽  
pp. 565-568
Author(s):  
Wan Maisarah Mukhtar ◽  
P. Susthitha Menon ◽  
Sahbudin Shaari
Keyword(s):  
Optical Fiber ◽  
Diffraction Pattern ◽  
Light Propagation ◽  
Optical Power ◽  
Transverse Motion ◽  
Circular Aperture ◽  
Fraunhofer Diffraction ◽  
Fresnel Number ◽  
Function Profile ◽  
Effect Of Light

Fraunhofer diffraction pattern from a circular aperture with the diameter of 10µm was observed using an optical fiber microprobe. The optical fiber microprobe started to detect optical power when the distance between the probe and the circular aperture was more than 292µm. When the probe was moved in a lateral motion, the light propagation showed a Bessel function profile. When the optical fiber microprobe was moved from 293µm to 309µm from the centre of the circular aperture in a transverse motion, the power detected was not consistent with a continuation of maxima and minima due to the effect of light propagation from the circular aperture. We also observed that the distance between the probe and the centre of the circular aperture was directly proportional with the radius of focused spot and inversely proportional with the Fresnel number.

Two-stage spatial filtering for diffraction pattern analysis

1981 ◽  
Vol 20 (6) ◽  
pp. 1050 ◽  
Author(s):  
J. A. Blodgett ◽  
R. L. Easton
Keyword(s):  
Diffraction Pattern ◽  
Pattern Analysis ◽  
Spatial Filtering ◽  
Two Stage

Shadow: A System for X-ray Powder Diffraction Pattern Analysis

1988 ◽  
Vol 32 ◽  
pp. 523-530
Author(s):  
Scott A. Howard
Keyword(s):  
Diffraction Pattern ◽  
Powder Diffraction ◽  
Pattern Analysis ◽  
Shadow System ◽  
X Ray ◽  
The Third

The Shadow system consists of a set of programs and files, the relation of which is illustrated in Figures 1 and 2. Of the three programs in the system, Shadow and XRDPLT are used routinely. The third, INSCAL, is used in the determination of various parameters characterizing the instrument. Two files, Shadow.DFT and XRDPLT.DFT, contain default values for parameters controlling the reduction and display of data. A third file, WSGDAT, contains the instrument parameters.

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