论文标题
使用频率梳子的任意光源的高分辨率光谱
High-resolution spectroscopy of arbitrary light sources using frequency combs
论文作者
论文摘要
使用频率梳子的多近近近近近近似技术 - 线条均匀均匀的光源 - 彻底改变了光学科学。通过用多个梳子线击败未知信号，恢复了其光谱。但是，这些技术仅限于测量相干来源，例如激光器。在这项工作中，我们演示了一种新的多近地差技术，该技术允许使用梳子检索几乎所有复杂的宽带光谱。引入了两个版本：使用可调延迟元件的延迟梳子技术，以及使用第二个梳子的双梳技术。在每种情况下，通过傅立叶转换两个频谱图之间的相关性来恢复源的光谱。这种方法本质上是统计的，几乎对任何来源（连贯或不连贯）都是一般的，从而可以通过高分辨率快速测量整个频谱。
Multiheterodyne techniques using frequency combs -- light sources whose lines are perfectly evenly-spaced -- have revolutionized optical science. By beating an unknown signal with the many lines of a comb, its spectrum is recovered. However, these techniques have been restricted to measuring coherent sources, such as lasers. In this work, we demonstrate a new multiheterodyne technique that allows for nearly any complex broadband spectrum to be retrieved using a comb. Two versions are introduced: a delayed comb technique that uses a tunable delay element, and a dual comb technique that uses a second comb. In each case, the spectrum of the source is recovered by Fourier transforming the correlation between two spectrograms. This approach is statistical in nature and is general to nearly any source (coherent or incoherent), allowing for the entire spectrum to be rapidly measured with high resolution.
