Coherent Random Fiber Laser-Enabled Super-Resolution Spectroscopy
Coherent Random Fiber Laser-Enabled Super-Resolution Spectroscopy
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DOI：
10.1021/acsphotonics.3c00410
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发表时间：
2023-07
期刊：
影响因子：
7
通讯作者：
Yanli Zhang;S. Wang;C. Zheng;Weili Zhang
中科院分区：
文献类型：
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作者：
Yanli Zhang;S. Wang;C. Zheng;Weili Zhang
受单分子定位显微镜的启发，超分辨率光谱通过光谱域的稀疏采样实现，其中能够随机发射稀疏峰的光源起着至关重要的作用。由于无序光散射的内在反馈机制，随机激光可以提供所需的发射特性，便于重建样品的详细光谱轮廓。在这里，我们提出了一种全光纤配置的相干随机激光器用于光谱测量，以打破光谱检测系统的仪器响应限制。通过在腔内引入精心设计的光谱裁剪元件，激光器保持在混沌状态，并表现出自调制的光谱行为。可以通过调节泵浦功率来控制发射光谱上随机峰的统计数量和分布。此外，该激光器还具有低泵浦阈值、窄线宽激光模式、灵活的工作波长范围、高光信噪比以及易于与光纤系统兼容等优点。利用低分辨率光谱仪，我们实验证明了超分辨率光谱重建，获得了约3.3的光谱增强。本研究为高分辨率光谱学提供了强大的照明光源和实现方法，是未来光学信息应用的重要工具。
Inspired by single-molecule localization microscopy, super-resolution spectroscopy has been achieved by sparse sampling in the spectral domain, where a light source capable of randomly emitting sparse peaks plays a crucial role. Due to the intrinsic feedback mechanism of disordered light scattering, random lasers can provide the desired emission characteristics that facilitate reconstructing the detailed spectral profiles of samples. Here, we propose an all-fiber-configured coherent random laser for spectral measurement to break the instrumental response limitation of spectral detection systems. The laser remains in a chaotic regime and exhibits self-modulating spectral behavior by introducing an elaborately designed spectral tailoring element inside the cavity. The statistical number and distribution of the random peaks over the emission spectrum can be manipulated by adjusting the pump power. In addition, the laser exhibits several attractive features, such as low pumping threshold, narrow-line-width lasing modes, flexible operating wavelength range, high optical signal-to-noise ratio, and easy compatibility with optical fiber systems. Using a low-resolution spectrograph, we experimentally demonstrate super-resolution spectrum reconstruction, obtaining a spectral enhancement of around 3.3. This work provides a powerful illumination source and realization method for high-resolution spectroscopy, which is an essential tool for future optical information applications.