使用数字增强外差干涉测量法对单个声光频率梳进行窄带读出和压缩。

Narrow-band readout and compression of a single acousto-optic frequency comb using digitally enhanced heterodyne interferometry.

作者信息

Chan Anika O, Wong Justin, Sibley Paul G, Bandutunga Chathura P

出版信息

Opt Express. 2025 Mar 10;33(5):11876-11886. doi: 10.1364/OE.547168.

Abstract

We present an acousto-optic frequency comb readout scheme synthesized from multiple intra-comb beat measurements using digitally enhanced heterodyne interferometry. The readout scheme enables a single acousto-optic frequency comb to achieve a compression factor, which normally requires a dual comb measurement scheme. We demonstrate an absorption measurement of the 2 P10 line obtaining a noise equivalent absorption sensitivity of 1.75 × 10cmHz. Additionally we demonstrate the ability of the system to software-adjust the compression factor to access a wider optical bandwidth.

摘要

我们提出了一种声光频率梳读出方案，该方案通过使用数字增强外差干涉测量法从多个梳内拍频测量中合成。该读出方案使单个声光频率梳能够实现压缩因子，而这通常需要双梳测量方案。我们展示了对2 P10谱线的吸收测量，获得了1.75×10cmHz的噪声等效吸收灵敏度。此外，我们还展示了该系统通过软件调整压缩因子以访问更宽光学带宽的能力。