| 摘要 |
A surface emitting laser having a substrate with top and bottom surfaces; a first stack of mirror layers of alternating indices of refraction located upon the top surface of the substrate; and active layer disposed over the first stack; a second stack of mirror layers of alternating indices of refraction disposed over the active layer and a recessed portion located centrally in the second stack extending through at least some of the second stack of mirror layers for improving the spectral width characteristic of the laser.
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