Title :
Electrical polarization control of vertical-cavity surface-emitting lasers using polarized feedback and a liquid crystal
Author :
Wilkinson, C.I. ; Woodhead, J. ; Frost, J.E.F. ; Roberts, J.S. ; Wilson, R. ; Lewis, M.F.
Author_Institution :
Dept. of Electron. & Electr. Eng., Sheffield Univ., UK
Abstract :
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.
Keywords :
distributed Bragg reflector lasers; laser feedback; light polarisation; liquid crystal devices; semiconductor lasers; surface emitting lasers; DBR lasers; VCSEL; contrast ratio; electrical polarization control; liquid crystal; liquid-crystal element; polarization state; polarized feedback; strong external optical feedback; vertical-cavity surface-emitting lasers; Distributed Bragg reflectors; Laser feedback; Liquid crystals; Mirrors; Optical control; Optical feedback; Optical polarization; Optical surface waves; Surface emitting lasers; Vertical cavity surface emitting lasers;
Journal_Title :
Photonics Technology Letters, IEEE
