标题： 从全二氧化硅光纤实现的双八度频率梳 显示英文标题

标题： Two-octave frequency combs from all-silica-fiber implementation

摘要： 中红外频率梳光谱技术能够在兆赫兹光谱分辨率、亚赫兹频率精度和微秒采集速度下实现分子测量。 然而，这种技术的广泛应用受到中红外频率梳光源的复杂性和对准敏感性的阻碍。 利用未被充分探索的二氧化硅光纤中红外窗口，为解决这些挑战提供了一个有前景的方法。 在本研究中，我们展示了二氧化硅光纤中红外频率梳生成的第一个实验演示和定量数值描述。 我们的全二氧化硅光纤频率梳在中红外区域具有100毫瓦的输出功率，覆盖超过两个八度（0.8$\mu$m到3.5$\mu$m）。 使用四周期（25飞秒）驱动脉冲抑制放大量子噪声，载波包络偏移频率表现出40分贝的信噪比和90千赫兹的自由运行带宽。 我们开发的模型为二氧化硅光纤中红外频率梳生成提供了定量指导，使得在有机合成、药代动力学过程和环境监测等不同领域实现了全光纤频率梳光谱技术。 显示英文摘要

摘要： Mid-infrared frequency comb spectroscopy enables measurement of molecular at megahertz spectral resolution, sub-hertz frequency accuracy and microsecond acquisition speed. However, the widespread adoption of this technique has been hindered by the complexity and alignment sensitivity of mid-infrared frequency comb sources. Leveraging the underexplored mid-infrared window of silica fibers presents a promising approach to address these challenges. In this study, we present the first experimental demonstration and quantitative numerical description of mid-infrared frequency comb generation in silica fibers. Our all-silica-fiber frequency comb spans over two octaves (0.8 $\mu$m to 3.5 $\mu$m) with a power output of 100 mW in the mid-infrared region. The amplified quantum noise is suppressed using four-cycle (25 fs) driving pulses, with the carrier-envelope offset frequency exhibiting a signal-to-noise ratio of 40 dB and a free-running bandwidth of 90 kHz. Our developed model provides quantitative guidelines for mid-infrared frequency comb generation in silica fibers, enabling all-fiber frequency comb spectroscopy in diverse fields such as organic synthesis, pharmacokinetics processes, and environmental monitoring.