Related Experiment Video
Updated: Mar 19, 2026

Author Spotlight: Unveiling the Potential of VSFG Microscopy in Studying Mesoscopically Heterogeneous Self-Assembled Structures
Published on: December 1, 2023
Complementary hybrid dual-comb spectroscopy
None:
Optical frequency combs generate precise optical frequencies tightly linked to stable microwave references. Dual-comb spectroscopy (DCS) utilizes the coherent interference of two combs with appropriately controlled different repetition frequencies. To improve its performance far beyond the trade-off relationship between its frequency resolution and measurement speed, we present a complementary hybridization approach consisting of a fiber-laser-based comb and an electro-optic-modulator-based comb with a near-integer multiple repetition frequency relationship. We suppressed relative phase noise by locking two distant electro-optic modulator (EOM) comb modes to one of the fiber comb modes and a cavity-locked laser, which was an optical reference of the fiber comb, and achieved a figure of merit of 4.3 × 107 Hz1/2. Finally, we revisit signal to noise ratio theory to derive a relationship applicable to this configuration and discuss future perspective as regards performance improvement.
Related Concept Videos
2D NMR: Homonuclear Correlation Spectroscopy (COSY)
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
Mass Spectrometry: Complex Analysis
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
Tandem Mass Spectrometry
UV–Vis Spectroscopy of Conjugated Systems
One of the factors influencing λmax is the extent of conjugation in...
2D NMR: Overview of Heteronuclear Correlation Techniques

