| 摘要 |
A semiconductor laser array includes a substrate and a first laser element provided on the substrate for emitting a first wavelength laser. The first laser element has a first multi-layer structure that includes a first active layer and a first waveguide structure. The first active layer has a first emission center. A second laser element for emitting a second wavelength laser is provided on the substrate and on the first multi-layer structure. The second laser element has a second multi-layer structure that includes a second active layer and a second wave guide structure. The second active layer has a second emission center. The second emission center is laterally and vertically spaced from the first emission center.
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