The increasing demand for diverse portable high-precision spectral analysis applications has driven the rapid development of spectrometer miniaturization. However, the resolutions of existing miniaturized spectrometers mostly remain at the nanometer level, posing a challenge for further enhancement towards achieving picometer-level precision. Here, we propose an integrated reconstructive spectrometer that utilizes Mach–Zehnder interferometers and a tunable diffraction network. Through random tuning in the time domain and disordered diffraction in the space domain, the random speckle patterns closely related to wavelength information are obtained to construct the transmission matrix. Experimentally, we achieve a high resolution of 100 pm and precisely reconstruct multiple narrowband and broadband spectra. Moreover, the proposed spectrometer features a simple structure, strong portability, and fast sampling speed, which has great potential in the practical application of high-precision portable spectral analysis.

中文翻译：

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C波段高分辨率集成时空随机散斑光谱仪


对多样化便携式高精度光谱分析应用的需求不断增长，推动了光谱仪小型化的快速发展。然而，现有小型化光谱仪的分辨率大多停留在纳米级别，这对进一步提高皮米级精度提出了挑战。在这里，我们提出了一种利用马赫-曾德尔干涉仪和可调谐衍射网络的集成重建光谱仪。通过时域的随机调谐和空间域的无序衍射，获得与波长信息密切相关的随机散斑图案，构建传输矩阵。通过实验，我们实现了 100 pm 的高分辨率，并精确重建了多个窄带和宽带光谱。此外，该光谱仪结构简单、便携性强、采样速度快，在高精度便携式光谱分析的实际应用中具有巨大潜力。