Determination of wavefront aberrations using a Fabry–Perot cavity

2011 ◽  
Vol 284 (13) ◽  
pp. 3197-3201 ◽  
Author(s):  
Kohei Takeno ◽  
Noriaki Ohmae ◽  
Norikatsu Mio ◽  
Tomohiro Shirai
Keyword(s):  
Wavefront Aberrations ◽  
Fabry Perot

scholarly journals Marseille Observatory Hα Survey of the Southern Galactic Plane and Magellanic Clouds

1998 ◽  
Vol 15 (1) ◽  
pp. 9-13 ◽  
Author(s):  
D. Russeil ◽  
Y. M. Georgelin ◽  
P. Amram ◽  
Y. P. Georgelin ◽  
A. Laval ◽  
...  
Keyword(s):  
Spiral Structure ◽  
Galactic Plane ◽  
Hii Regions ◽  
Magellanic Clouds ◽  
Spectral Information ◽  
Fourth Quadrant ◽  
Diffuse Emission ◽  
Gas Kinematics ◽  
Fabry Perot

AbstractThe ionised gas regions, which are the main tracers of the spiral arms, can be used for the study and determination of the spiral structure of our Galaxy. Towards this goal, the Marseille Observatory elaborated and developed an instrument, using a scanning Fabry–Perot interferometer, particularly suited for the observation of extended objects. A survey of the southern Galactic plane then started at the beginning of 1990. The major instrumental aim is to obtain spectral information, and therefore the ionised gas kinematics, in each pixel of the observed fields. Already 300 fields of 38′×38′ have been observed in Hα with a spatial resolution of 9″×9″, covering almost the entire fourth quadrant of the Galactic plane, and numerous discrete HII regions have been detected, as well as diffuse emission which is widely distributed. Also, the Magellanic Clouds have been studied using the same instrument.

Spectrum Determination of Terahertz Sources Using Fabry-Perot Interferometer and Bolometer Detector

2004 ◽  
Vol 25 (2) ◽  
pp. 215-228 ◽  
Author(s):  
Yanqing Deng ◽  
Roland Kersting ◽  
Victor Roytburd ◽  
Jingzhou Xu ◽  
Ricardo Ascazubi ◽  
...  
Keyword(s):  
Terahertz Sources ◽  
Fabry Perot

scholarly journals Accurate determination of terahertz optical constants by vector network analyzer of Fabry–Perot response

2013 ◽  
Vol 38 (24) ◽  
pp. 5438 ◽  
Author(s):  
Wenfeng Sun ◽  
Bin Yang ◽  
Xinke Wang ◽  
Yan Zhang ◽  
Robert Donnan
Keyword(s):  
Optical Constants ◽  
Accurate Determination ◽  
Vector Network Analyzer ◽  
Network Analyzer ◽  
Fabry Perot

scholarly journals Simplified Reflection Fabry-Perot Method for Determination of Electro-Optic Coefficients of Poled Polymer Thin Films

Polymers ◽  
2011 ◽  
Vol 3 (3) ◽  
pp. 1310-1324 ◽  
Author(s):  
Dong Hun Park ◽  
Jingdong Luo ◽  
Alex K.-Y. Jen ◽  
Warren N. Herman
Keyword(s):  
Thin Films ◽  
Polymer Thin Films ◽  
Poled Polymer ◽  
Electro Optic ◽  
Fabry Perot

scholarly journals Active Compensation of Radiation Effects on Optical Fibers for Sensing Applications

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8193
Author(s):  
Sohel Rana ◽  
Austin Fleming ◽  
Nirmala Kandadai ◽  
Harish Subbaraman
Keyword(s):  
Optical Fibers ◽  
Radiation Effects ◽  
Accurate Determination ◽  
Radiation Environment ◽  
Physical Parameters ◽  
Air Cavity ◽  
Sensing Applications ◽  
Fabry Perot ◽  
Radiation Induced

Neutron and gamma irradiation is known to compact silica, resulting in macroscopic changes in refractive index (RI) and geometric structure. The change in RI and linear compaction in a radiation environment is caused by three well-known mechanisms: (i) radiation-induced attenuation (RIA), (ii) radiation-induced compaction (RIC), and (iii) radiation-induced emission (RIE). These macroscopic changes induce errors in monitoring physical parameters such as temperature, pressure, and strain in optical fiber-based sensors, which limit their application in radiation environments. We present a cascaded Fabry–Perot interferometer (FPI) technique to measure macroscopic properties, such as radiation-induced change in RI and length compaction in real time to actively account for sensor drift. The proposed cascaded FPI consists of two cavities: the first cavity is an air cavity, and the second is a silica cavity. The length compaction from the air cavity is used to deduce the RI change within the silica cavity. We utilize fast Fourier transform (FFT) algorithm and two bandpass filters for the signal extraction of each cavity. Inclusion of such a simple cascaded FPI structure will enable accurate determination of physical parameters under the test.

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