Title: Computational electro-optic frequency comb spectroscopy Show Chinese title

Title: 计算电光频梳光谱学

Abstract: Computational techniques have gained significant traction in photonics, enabling the co-design of hardware and data processing algorithms to drastically simplify optical system architectures and improve their performance. However, their application in optical frequency comb spectroscopy remains considerably underexplored. In this work, we introduce a non-interferometric approach to frequency comb spectroscopy based on dynamically tailored electro-optic modulation. The core of our method is a reconfigurable electro-optic comb generator capable of producing a sequence of known comb spectra to interrogate a spectroscopic sample. Instead of recording spectrally resolved or interferometric data, our system captures a set of integrated optical power measurements--one per probe comb--from which the sample's spectral response is computationally reconstructed by solving an inverse problem. We present the theoretical foundations of this method, assess its limitations, and validate it through numerical simulations. As a proof of concept, we demonstrate the experimental reconstruction of several spectral signatures, including a molecular absorption line at 1545 nm. For these results, we use numerically computed spectra and experimentally measured power values, all acquired within 10 milliseconds. Finally, we discuss potential extensions and improvements of the method, as well as its integration into chip-scale spectroscopic systems. Show Chinese abstract

Abstract: 计算技术在光子学领域获得了广泛关注，使得硬件和数据处理算法的协同设计能够显著简化光学系统架构并提高其性能。 然而，它们在光学频率梳光谱学中的应用仍相当少被探索。 在本工作中，我们介绍了一种基于动态定制电光调制的非干涉频率梳光谱学方法。 我们方法的核心是一种可重构的电光梳生成器，能够产生一系列已知的梳状光谱以探测光谱样品。 我们的系统不是记录光谱分辨或干涉数据，而是从每个探测梳中捕获一组集成的光学功率测量值，通过求解逆问题来计算重建样品的光谱响应。 我们提出了该方法的理论基础，评估了其局限性，并通过数值模拟进行了验证。 作为概念验证，我们展示了几个光谱特征的实验重建，包括1545纳米处的分子吸收线。 对于这些结果，我们使用了数值计算的光谱和实验测量的功率值，所有数据均在10毫秒内获得。 最后，我们讨论了该方法的潜在扩展和改进，以及其集成到芯片级光谱系统中的可能性。