期刊
OPTICS AND LASER TECHNOLOGY
卷 122, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2019.105888
关键词
Dilute Nitride; GaInNAs; Light emitting diodes; Resonant Cavity; RCLED
资金
- Scientific Research Projects Coordination Unit of Istanbul University [FBA-201832506]
- Engineering and Physical Sciences Research Council (EPSRC) of the UK [EP/M015165/1]
- Royal Academy of Engineering (RAEng) through a RAEng Research Fellowship (TOAST)
- EPSRC [EP/M015165/1] Funding Source: UKRI
Resonant cavity LEDs (RCLEDs) are a viable and low-cost alternative light source to lasers for optical communication systems in the 1.3 mu m O-band. Most work in this area has been conducted on InP-based material, which is inherently costly, devices often require cooling and the refractive index contrast for constructing mirrors is low. Here, we demonstrate a high-performance GaAs-based RCLED using a dilute nitride GaInNAs active layer emitting in the 1.3 mu m wavelength window. While previous 1.3 mu m RCLEDs have used metallic mirrors on the back of the device, we exploit the high refractive index contrast of the GaAs/AlAs system to place Distributed Bragg mirrors on both sides of the active layer and achieve superior performance. The external quantum efficiency of the devices is 20% and the full width at half maximum of the emission spectrum is 5.2 nm at room temperature, into a narrow angular cone. The emission power from an 88 mu m diameter aperture is 0.5 mW, which, together with the narrow spectral linewidth, makes the device suitable for deployment in a coarse Wavelength Division Multiplexing (WDM) communications system.
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