Controlled polarization switching in VCSELs by means of asymmetric current injection

We have investigated the potential of asymmetric current injection for polarization switching in GaAs-based intracavity contacted vertical-cavity surface-emitting lasers using two sets of p- and n-type contacts per device. When using the contacts aligned along the [11~0] crystal direction, the obser...

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Bibliographic Details
Published in:IEEE photonics technology letters 2004-03, Vol.16 (3), p.708-710
Main Authors: Augustin, L.M., Smalbrugge, E., Choquette, K.D., Karouta, F., Strijbos, R.C., Verschaffelt, G., Geluk, E.-J., van de Roer, T.G., Thienpont, H.
Format: Article
Language:English
Subjects:
Asymmetry
Crystals
Current injection
Distributed Bragg reflectors
Distributed feedback devices
Emission
Fiber lasers
Gallium arsenide
Laser feedback
Lasers
Optical fiber polarization
Optical polarization
Polarization
Surface emitting lasers
Switches
Switching
Vertical cavity surface emitting lasers
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Summary:We have investigated the potential of asymmetric current injection for polarization switching in GaAs-based intracavity contacted vertical-cavity surface-emitting lasers using two sets of p- and n-type contacts per device. When using the contacts aligned along the [11~0] crystal direction, the observed laser polarization is parallel to [110], whereas, using the contacts along the [110] crystal direction, the polarization of the laser emission switches to a direction making an angle of 25/spl deg/-90/spl deg/ towards [110]. To overcome this peculiar result, a careful design of the contact layers in the intracavity structure is required.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2004.823693