Precise Brillouin phase spectrum measurement in coherent BOTDA sensor with phase fluctuation cancellation

2016 ◽  
Author(s):  
Z. -L. Li ◽  
L. -S. Yan ◽  
L. Y. Shao ◽  
W. Pan ◽  
B. Luo ◽  
...  
Keyword(s):  
Phase Fluctuation ◽  
Phase Spectrum ◽  
Spectrum Measurement

scholarly journals Dispersion Compensation Method for Lamb Waves Based on Measured Wavenumber

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
J. Li ◽  
Y. Han
Keyword(s):  
Steel Plate ◽  
Lamb Waves ◽  
Dispersion Compensation ◽  
Distance Estimation ◽  
Phase Spectrum ◽  
Compensation Method ◽  
Phase Compensation ◽  
Material Parameters ◽  
Spectrum Measurement

In this study, a delta wavenumber dispersion compensation (∆K-DC) method was developed and applied, not only with the theoretical wavenumber but also with the measured wavenumber. Dispersion compensation can be achieved by the following steps: relative wavenumber measurement, traveling distance estimation, phase compensation, and wave correction. The feasibility of ∆K-DC with the theoretical wavenumber and measured wavenumber was validated with a high-dispersive A0 mode in a 2 mm steel plate experiment. The results showed that phase spectrum measurement was an effective method to construct the wavenumber curve, the propagation distances estimated by SAP2 were very accurate, and the dispersive signals can be compensated perfectly by applying the phase compensation and wave correction methods for each wavepacket. The present results highlight the application of ∆K-DC on dispersion compensation without any material parameters of a waveguide.

Principle of relative phase spectrum measurement in SIP

2009 ◽  
Author(s):  
Rujun Chen ◽  
Zhanxiang He ◽  
Lanfang He ◽  
Xuejun Liu
Keyword(s):  
Relative Phase ◽  
Phase Spectrum ◽  
Spectrum Measurement

Novel Phase Spectrum Measurement Method based on Stimulated Brillouin Scattering

2008 ◽  
Author(s):  
Asier Villafranca ◽  
Javier Lasobras ◽  
Francisco López ◽  
Rafael Alonso ◽  
Ignacio Garcés
Keyword(s):  
Measurement Method ◽  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
Phase Spectrum ◽  
Spectrum Measurement ◽  
Stimulated Brillouin

scholarly journals Improved short-baseline neutrino oscillation search and energy spectrum measurement with the PROSPECT experiment at HFIR

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
M. Andriamirado ◽  
A. B. Balantekin ◽  
H. R. Band ◽  
C. D. Bass ◽  
D. E. Bergeron ◽  
...  
Keyword(s):  
Energy Spectrum ◽  
Neutrino Oscillation ◽  
Short Baseline ◽  
Spectrum Measurement
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