Concerns with regards to the capacity of the single-mode fiber have emerged as a result of exponentially increasing bandwidth requirements. The demonstration of the thulium-doped fiber amplifier and the hollow-core photonic bandgap fiber (HC-PBGF) have highlighted the amplification and fiber propagation aspects of the 2 μm waveband respectively, indicating its potential to serve as an adjunct to the present communication infrastructure at the O/C bands. In addition, the 2 μm waveband is not restricted to fiber communications. Applications, while not exhaustive, include spectroscopy, free-space communications, LIDAR, optical logic and signal processing as well as enabling the optical Kerr effect on silicon. As such, the application-rich nature of the waveband has induced an influx of interest from the photonics community.

中文翻译：

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工作于 1881-1947 nm 的紧凑型硅光子混合环外腔 (SHREC) 波长可调谐激光二极管的分析


由于带宽需求呈指数增长，人们对单模光纤的容量产生了担忧。掺铥光纤放大器和空心光子带隙光纤（HC-PBGF）的演示分别突出了2μm波段的放大和光纤传播方面，表明其作为现有通信基础设施的辅助手段的潜力在 O/C 频段。此外，2μm波段并不局限于光纤通信。应用虽然并不详尽，但包括光谱学、自由空间通信、激光雷达、光学逻辑和信号处理以及在硅上实现光学克尔效应。因此，该波段应用丰富的性质引起了光子学界的广泛兴趣。