Results 101 to 110 of about 21,165 (218)

Doppler shift system [PDF]

open access: yes, 1974
A system is described for measuring velocities of radiating particles based on Doppler shift. Light from the particles is directed through a narrow band optical filter to a Fabry-Perot interferometer initially tuned to a selected center line ...
Aisenberg, S.
core   +1 more source

Fabry–Perot interferometer as a solar background noise suppressor: application to daytime lidar

open access: yesAnnals of Geophysics, 2012
Continuous atmospheric probing by a lidar is a requirement for many applications. However, due to high solar background noise during the daytime, lidar operations are mostly restricted to night-time.
Karnam Raghunath   +2 more
doaj   +1 more source

Modified All-Fiber Fabry–Perot Interferometer and Its Refractive Index, Load, and Temperature Analyses

open access: yesIEEE Photonics Journal, 2015
An all-fiber Fabry-Perot (FP) interferometer is proposed and validated by the arc splicing technique. By using conventional fiber and special hollow-core photonic crystal fiber, several FP cavities were formed at the conventional fiber tip using arc ...
D. Jauregui-Vazquez   +7 more
doaj   +1 more source

Simultaneous Inclination and Azimuth Sensing Based on a Multi-Core Fiber Fabry–Perot Interferometer with Vernier Effect

open access: yesPhotonics
Azimuth sensing plays a vital role in numerous industrial applications where tilt angle serves as a key parameter. To address the demand for accurate and reliable measurements, we propose an all-fiber two-dimensional inclinometer based on the Vernier ...
Jiayu Liu   +5 more
doaj   +1 more source

THE SIMULATION OF A FABRY-PEROT INTERFEROMETER [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1997
A Fabry-Perot interferometer has a very high (~1,000,000) resolution, so recently this has been widely used for many fields of space science. To understand the working principle of this a mathematical modeling is needed, and to analyze the interferogram ...
Gi-Hyuk Choi, David Rees
doaj  

Gas temperature and density measurements based on spectrally resolved Rayleigh-Brillouin scattering [PDF]

open access: yes
The use of molecular Rayleigh scattering for measurements of gas density and temperature is evaluated. The technique used is based on the measurement of the spectrum of the scattered light, where both temperature and density are determined from the ...
Lock, James A., Seasholtz, Richard G.
core   +1 more source

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