Microresonator Soliton Dual-Comb Spectroscopy

TL;DR

This paper demonstrates dual-comb spectroscopy using microresonator soliton devices, enabling high-resolution, rapid spectral analysis on a chip platform with potential for integrated, high signal-to-noise applications.

Contribution

It introduces the use of high-coherence microresonator soliton combs for dual-comb spectroscopy, advancing miniaturization and integration capabilities.

Findings

Successful demonstration of dual-comb spectroscopy with microresonator solitons

Broad, reproducible spectral envelopes achieved

Potential for high signal-to-noise, fast spectral acquisition

Abstract

Rapid characterization of optical and vibrational spectra with high resolution can identify species in cluttered environments and is important for assays and early alerts. In this regard, dual-comb spectroscopy has emerged as a powerful approach to acquire nearly instantaneous Raman and optical spectra with unprecedented resolution. Spectra are generated directly in the electrical domain and avoid bulky mechanical spectrometers. Recently, a miniature soliton-based comb has emerged that can potentially transfer the dual-comb method to a chip platform. Unlike earlier microcombs, these new devices achieve high-coherence, pulsed mode locking. They generate broad, reproducible spectral envelopes, which is essential for dual-comb spectroscopy. Here, dual-comb spectroscopy is demonstrated using these devices. This work shows the potential for integrated, high signal-to-noise spectroscopy with fast acquisition rates.