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Electrical polarization control of vertical-cavity surface-emitting lasers using polarized feedback and a liquid crystal

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6 Author(s)
Wilkinson, C.I. ; Dept. of Electron. & Electr. Eng., Sheffield Univ., UK ; Woodhead, J. ; Frost, J.E.F. ; Roberts, J.S.
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We report electrical control of the polarization state of a vertical-cavity surface-emitting laser (VCSEL), The VCSEL is subject to strong external optical feedback (up to 6% of emission), with polarization controlled by a liquid-crystal (LC) element, It is found that the contrast ratio of the complete system can be enhanced compared to the contrast ratio of the LC element alone.

Published in:

Photonics Technology Letters, IEEE  (Volume:11 ,  Issue: 2 )