A 0. 4 mm Interferometer System Using Dielectric Waveguide Page: 4 of 11
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I HfCOOLED
PUTltV
DETECTORS
CO? LASER
POLARIZATION
MOOUIATOR
CHANNEL
FERRITE
CO? LASER
-- HOLLOW DIELECTRIC
WAVEGOiOf
^--N (l POLVETHVIEN? LENSES
MV( AR BEAMSPLITTERS
GOLD COATED GLASS MIRRORS
SCMOTTK V OIODE
Figure I. Schematic of the submillimeter-wave polarimeter/interferoraeter
system using hollow dielectric waveguide and heterodyne detection.
nitrogen. Upon entering the waveguide, the submillimeter laser beams assume an
EH^ high-order waveguide mode and are transmitted without the need for relay
lenses to maintain a uniform beam size. Thin transparent pellicles of mylar are
used to seal the ends of the waveguide against the atmosphete. For the sake of
simplicity, only one of the four chords is shown in Fig. 1 and is henceforth
described. As shown in Fig. 2, the probing beam traverses a poloidal plasma cross
section and experiences a phase shift, i, (22)
<t>, = 2.82 • 10
(rad)
and a Faraday rotation, 0
0 v = 1.5 • 10
p(deg)
-12
(14)
f+ ZQ
j_z ne(Z)B(Z)dZ
(1)
(2)
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Hutchinson, D. P.; Ma, C. H.; Staats, P. A. & Vander Sluis, K. L. A 0. 4 mm Interferometer System Using Dielectric Waveguide, article, January 1, 1982; Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc1087095/m1/4/: accessed May 31, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.