| 摘要 |
<p>PROBLEM TO BE SOLVED: To accomplish an in-phase surface-emitting laser array element capable of high-speed direct modulation and high optical output.SOLUTION: A surface-emitting laser comprises: an InP substrate; a first reflector on the InP substrate; a first spacer layer and an active layer on the first reflector; a second spacer layer on the active layer; a tunnel junction layer arranged on one surface in the second spacer layer; and a second reflector on the spacer layer. The tunnel junction layer includes a plurality of elements of a surface-emitting laser array, and a layer disposed between the plurality of elements and having an optical gain.</p> |
