公开(公告)号：US4648096A

公开(公告)日：1987-03-03

申请号：US660934

申请日：1984-10-15

申请人： Shigeyuki Akiba ,  Katsuyuki Utaka ,  Kazuo Sakai ,  Yuichi Matsushima

发明人： Shigeyuki Akiba ,  Katsuyuki Utaka ,  Kazuo Sakai ,  Yuichi Matsushima

IPC分类号： H01S5/00 ,  H01S5/12 ,  H01S5/16 ,  H01S3/19

CPC分类号： H01S5/164 ,  H01S5/12 ,  H01S5/124

摘要： A distributed feedback semiconductor laser which has periodic corrugations in a light emitting layer or an adjoining layer in the direction of travel of light and performs laser oscillation by the injection of carriers into said light emitting layer. In accordance with the present invention, there are provided, in the neighborhood of the center of a laser region, a region for changing the phase of the periodic corrugations by about 180 degrees, and, on the extension of the laser oscillation region at both sides thereof, a window region formed of a semiconductor larger in energy gap but smaller in refractive index than the light emitting layer, the length of the window region being so limited as to prevent substantial reflection of laser output light in the window region.

摘要翻译： 一种分布式反馈半导体激光器，其在光的行进方向上在发光层或邻接层中具有周期性波纹，并通过将载流子注入所述发光层来执行激光振荡。 根据本发明，在激光区域的中心附近设置用于将周期性波纹的相位改变约180度的区域，并且在两侧的激光振荡区域的延伸上 由能隙较大且折射率小于发光层的半导体形成的窗口区域，窗口区域的长度受到限制，以防止激光输出光在窗口区域中的实质反射。