Line-of-Sight Visible Light Communications With InGaN-Based Resonant Cavity LEDs
Line-of-Sight Visible Light Communications With InGaN-Based Resonant Cavity LEDs
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DOI：
10.1109/lpt.2013.2276105
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发表时间：
2013-08
影响因子：
2.6
通讯作者：
Chia-Lung Tsai;Zhong-Fan Xu
中科院分区：
文献类型：
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作者：
Chia-Lung Tsai;Zhong-Fan Xu
研究人员对基于 InGaN 的高效谐振腔发光二极管 (RCLED) 作为可见光通信的潜在光源进行了研究。实验上，通过金属有机气相外延生长了具有合理的蓝光发射晶体质量的 InGaN 多量子阱 LED。使用两对分布式布拉格反射器以及金属银层来形成包含光学腔的结构。由此产生的 InGaN RCLED 在光输出功率、外部量子效率和方向性方面表现出比传统 LED 更高的性能。此外，两个凸面相向的平凸透镜用于在发射器和接收器之间建立定向视线光学链路。在 100 厘米的距离内，数据传输速率高达 100 Mbit/s，这意味着只要能够有效过滤慢响应的磷光发射，就意味着使用磷光体转换的白色 RCLED 进行室内可见光通信的潜力。
Efficient InGaN-based resonant-cavity light-emitting diodes (RCLEDs) are investigated as potential light sources for visible light communications. Experimentally, InGaN multiple-quantum-well LEDs with a reasonable crystalline quality for blue light emission were grown by metal organic vapor phase epitaxy. A two-pair distributed Bragg reflector, along with a metallic Ag layer, was used to form a structure containing an optical cavity. The resulting InGaN RCLEDs exhibit improved performance over conventional LEDs in terms of light output power, external quantum efficiency, and directionality. In addition, two plano-convex lenses with facing convex surfaces were used to build a directed line-of-sight optical link between the transmitter and the receiver. Data transmission with rates up to 100 Mbit/s is demonstrated over a distance of 100 cm, implying the potential for indoor visible light communications with phosphor-converted white RCLEDs, provided that the slow-responding phosphorescent emission could be effectively filtered.