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A translational polarization rotator

Chuss, David T., Wollack, Edward J., Pisano, Giampaolo, Ackiss, Sheridan, U-Yen, Kongpop and Ng, Ming wah 2012. A translational polarization rotator. Applied Optics 51 (28) , pp. 6824-6830. 10.1364/AO.51.006824

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We explore a free-space polarization modulator in which a variable phase is introduced between the right- and left-handed circular polarization components and used to rotate the linear polarization of the outgoing beam relative to that of the incoming beam. In this device, the polarization states are separated by a circular polarizer that consists of a quarter-wave plate in combination with a wire grid. A movable mirror is positioned behind and parallel to the circular polarizer. As the polarizer–mirror distance is changed, an incident linear polarization will be rotated through an angle that is proportional to the introduced phase delay. We demonstrate a prototype device that modulates Stokes Q and U over a 20% bandwidth, from 77 to 94 GHz.

Item Type: Article
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: Optical Society of America
ISSN: 0003-6935
Last Modified: 04 Jun 2017 06:27

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