Abstract
Vertical-cavity surface-emitting lasers (VCSEL) are cost-effective light sources for various applications such as telecommunications or gas sensing. Compared to classical edge-emitting lasers, VCSELs are particularly qualified for monolithic one- and two-dimensional array integration. To achieve higher output power larger active volumes are needed. For edge-emitters this problem is solved by cleaving longer lasers, only limiting the maximum output power by laser facet degradation, whereas for VCSELs larger apertures are needed which have to be pumped and cooled homogeneously. Just recently, first monolithic VCSEL arrays for 1.55 jam have been presented showing maximum output powers beyond 30 mW [1].
© 2007 IEEE
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