Design of superstructure fiber Bragg gratings with a Fourier analysis technique and its applications to multiple ultranarrow transmission gratings

2008 ◽  
Vol 47 (11) ◽  
pp. 115001
Author(s):  
Xueming Liu
Keyword(s):  
Fourier Analysis ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Analysis Technique ◽  
Fourier Analysis Technique

Motion at an Explosive Source as Deduced From Surface Waves

1960 ◽  
Vol 31 (1-2) ◽  
pp. 5-17
Author(s):  
Carl Kisslinger
Keyword(s):  
Fourier Analysis ◽  
Vertical Acceleration ◽  
Analysis Method ◽  
Phase Velocities ◽  
The Earth ◽  
Analysis Technique ◽  
Explosive Source ◽  
History Of ◽  
Frequency Components ◽  
Fourier Analysis Technique

Abstract The history of events occurring near the source following a small explosion has been deduced from the Rayleigh waves recorded at two distances. The Fourier analysis method developed by Sato, and Lamb’s solution for the displacement on a half-space have been employed in two distinct approaches to this problem. The displacement history from the first approach shows an essentially rectilinear vibration of the earth partiele, following the initial compression. The second technique yields the vertical point force equivalent to the explosion. The vertical acceleration at the source from the first method agrees fairly well in general form with the force found in the second. Information about the phase velocities and the initial phases of the constituent frequency components is a valuable by product of the Fourier analysis technique.

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