We propose and experimentally demonstrate an 850 nm single-mode surface-emitting distributed feedback laser based on the surface grating. The laser composes a second-order grating section sandwiched by two first-order grating sections. The second-order grating provides not only surface emission, but also phase shift to remove the emission degeneracy. A high side-mode suppression ratio of 47 dB has been achieved. By employing a large-area rectangle-shaped oxidized aperture, a low threshold current of 1.8 mA and a low differential resistance of 59 Ω are successfully achieved in a horizontal-cavity surface-emitting laser.

中文翻译：

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基于表面光栅的具有大面积氧化孔径的单模表面发射DFB激光器。

我们提出并实验证明了基于表面光栅的850 nm单模表面发射分布式反馈激光器。激光器组成一个由两个一阶光栅部分夹在中间的二阶光栅部分。二阶光栅不仅提供表面发射，而且提供相移以消除发射的简并性。实现了47 dB的高侧模抑制比。通过采用大面积矩形氧化孔，在水平腔面发射激光器中成功实现了1.8 mA的低阈值电流和59Ω的低差分电阻。