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Control of vertical-cavity laser polarization with anisotropic transverse cavity geometries

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2 Author(s)
Choquette, K.D. ; Sandia Nat. Labs., Albuquerque, NM, USA ; Leibenguth, R.E.

We show the two-fold polarization degeneracy of etched air-post vertical-cavity surface emitting laser diodes can be lifted and a dominant polarization state selected through use of anisotropic transverse laser cavity geometries. For lasers with rhombus-shaped cavities, fundamental mode lasing emission linearly polarized along one specified crystal axis is obtained up to twice the threshold current. For dumbbell-shaped lasers, fundamental mode lasing emission linearly polarized along one specified crystal axis is maintained over the entire operating range of the device producing a maximum orthogonal polarization suppression ratio of 14 dB.<>

Published in:

Photonics Technology Letters, IEEE  (Volume:6 ,  Issue: 1 )