Polarization modulation time-domain terahertz polarimetry.
Opt Express
; 20(11): 12303-17, 2012 May 21.
Article
em En
| MEDLINE
| ID: mdl-22714218
ABSTRACT
We present high precision measurements of polarization rotations in the frequency range from 0.1 to 2.5 THz using a polarization modulation technique. A motorized stage rotates a polarizer at ~ 80 Hz, and the resulting modulation of the polarization is measured by a lock-in technique. We achieve an accuracy of 0.050° (900 µrad) and a precision of 0.02° (350 µrad) for small rotation angles. A detailed mathematical description of the technique is presented, showing its ability to fully characterize elliptical polarizations from 0.1 to 2.5 THz.
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Base de dados:
MEDLINE
Assunto principal:
Refratometria
/
Telecomunicações
Idioma:
En
Revista:
Opt Express
Assunto da revista:
OFTALMOLOGIA
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Estados Unidos