<p>A superluminescent diode has an active layer confined in a channel cut into current blocking layers on a semiconductor substrate. This structure gives a small output beam diameter and high coupling efficiency, even when coupled into single-mode fiber. At the end of the channel distant from the output facet, the active layer makes slanting contact with a rough diffusing surface formed by the current blocking layers and substrate. This easily-manufactured diffusing surface reduces optical gain within the active layer, thereby preventing lasing without requiring an antireflection coating.</p>
申请公布号
EP0372394(A1)
申请公布日期
1990.06.13
申请号
EP19890122103
申请日期
1989.11.30
申请人
OKI ELECTRIC INDUSTRY COMPANY, LIMITED
发明人
KASHIMA, YASUMASA OKI ELECTRIC INDUSTRY CO., LTD.;KOBAYASHI, MASAO OKI ELECTRIC INDUSTRY CO., LTD.;HOSOI, YOJI OKI ELECTRIC INDUSTRY CO., LTD.;TSUBOTA,TAKASHI OKI ELECTRIC INDUSTRY CO., LTD.