中国物理B ›› 2011, Vol. 20 ›› Issue (10): 108503-108503.doi: 10.1088/1674-1056/20/10/108503
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
梁德春, 安琪, 金鹏, 李新坤, 魏恒, 吴巨, 王占国
Liang De-Chun(梁德春), An Qi(安琪), Jin Peng(金鹏)†, Li Xin-Kun(李新坤), Wei Heng(魏恒), Wu Ju(吴巨), and Wang Zhan-Guo(王占国)
摘要: This paper reports the fabrication of J-shaped bent-waveguide superluminescent diodes utilizing an InAlGaAs/AlGaAs quantum dot active region. The emission spectrum of the device is centred at 884 nm with a full width at half maximum of 37 nm and an output power of 18 mW. By incorporating an Al composition into the quantum dot active region, short-wavelength superluminescent diode devices can be obtained. An intersection was found for the light power-injection current curves measured from the straight-waveguide facet and the bent-waveguide facet, respectively. The result is attributed to the conjunct effects of the gain and the additional loss of the bent waveguide. A numerical simulation is performed to verify the qualitative explanation. It is shown that bent waveguide loss is an important factor that affects the output power of J-shaped superluminescent diode devices.
中图分类号: (Light-emitting devices)