A narrow-linewidth laser operating at the telecommunications band combined with both fast and wide-band tuning features will have promising applications. Here we demonstrate a single-mode (both transverse and longitudinal mode) continuous microlaser around 1535 nm based on a fiber Fabry–Perot microcavity, which achieves wide-band tuning without mode hopping to the 1.3 THz range and fast tuning rate to 60 kHz and yields a frequency scan rate of 1.6×1017 Hz/s. Moreover, the linewidth of the laser is measured as narrow as 3.1 MHz. As the microlaser combines all these features into one fiber component, it can serve as the seed laser for versatile applications in optical communication, sensing, frequency-modulated continuous-wave radar, and high-resolution imaging.

中文翻译：

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基于光纤法布里-珀罗微腔的快速宽带调谐单模微激光器

在电信频段工作的窄线宽激光器结合快速和宽带调谐功能将具有广阔的应用前景。在这里，我们展示了一种基于光纤 Fabry-Perot 微腔的 1535 nm 左右的单模（横模和纵模）连续微激光器，它实现了宽带调谐，无需跳模至 1.3 THz 范围和快速调谐速率至 60 kHz 和产生 1.6×1017 Hz/s 的频率扫描速率。此外，激光的线宽测量窄至 3.1 MHz。由于微型激光器将所有这些特性结合到一个光纤组件中，因此它可以作为种子激光器用于光通信、传感、调频连续波雷达和高分辨率成像等多种应用。