Vertical cavity surface emitting laser arrays for illumination
First Claim
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1. An infra-red illumination source comprising:
- a plurality of vertical cavity surface emitting laser chips, each chip comprised of a plurality of vertical cavity surface emitting laser elements, the elements on each chip emitting infra-red light and being coupled together so that they can be driven at least in parallel, the chips being coupled together by a combination of series and parallel couplings; and
a power supply coupled to the chips for providing drive current to the elements.
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Abstract
Arrays of vertical cavity surface emitting lasers ("VCSEL"s) used for illumination in both infra-red and visible light wavelengths are described. By using several different arrays, each array generating light of a different wavelength, a replacement for conventional lighting sources can be obtained. The present invention offers lower power consumption and longer operating lifetime than known lighting technologies.
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Citations
7 Claims
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1. An infra-red illumination source comprising:
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a plurality of vertical cavity surface emitting laser chips, each chip comprised of a plurality of vertical cavity surface emitting laser elements, the elements on each chip emitting infra-red light and being coupled together so that they can be driven at least in parallel, the chips being coupled together by a combination of series and parallel couplings; and a power supply coupled to the chips for providing drive current to the elements. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification