Wavelength and polarization multiplexed vertical cavity surface

Coherent light generators – Particular resonant cavity – Distributed feedback

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372 45, 372 50, 372 27, 372103, H01S 308, H01S 3085, H01S 3103

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active

060027053

ABSTRACT:
The present invention relates to a vertical cavity surface emitting laser device comprising a plurality of semiconductor layers formed upon a substrate and capable of emitting a laser beam of a selected wavelength and a selected polarization, wherein said polarization is established by the presence of stress inducing elements disposed on said free surface of the laser device which induce a stress in the active layers of the laser device. The stress inducing elements are made of a material having a higher coefficient of thermal expansion than the material which comprises the surface layer of the laser device.

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