Bibliographic Details
| Title: |
Phase-locked feed forward stabilization for dual comb spectroscopy |
| Authors: |
Pal, Mithun, Eber, Alexander, Fürst, Lukas, Hruska, Emily, Ossiander, Marcus, Bernhardt, Birgitta |
| Publication Year: |
2024 |
| Collection: |
Physics (Other) |
| Subject Terms: |
Physics - Optics, Physics - Applied Physics |
| More Details: |
Sustained mutual coherence between two combs over extended periods is a prerequisite for dual-comb spectroscopy (DCS), particularly in achieving high-resolution molecular spectroscopy and precise spectral measurements. However, achieving long coherence times remains a challenge for Yb-doped frequency combs. This work introduces an experimental approach for phase-stable DCS using Yb-doped frequency combs at 1.03 ${\mu}$m with a novel feed-forward method, combatting the limitations of mutual coherence. Without relying on computer-based phase correction, we achieve a coherence time of 1000 seconds - three orders of magnitude longer than the current state of the art for DCS. This extended coherence enables time-domain averaging, resulting in a signal-to-noise ratio (SNR) of 2045. We demonstrate high-resolution monitoring of weak overtone transitions in the P and R branches of C${_2}$H${_2}$, with good agreement with HITRAN. The phase-locked multiheterodyne system also enables phase spectrum measurements with a scatter down to 7 mrad. Furthermore, we successfully extend our technique to the visible wavelength range using second harmonic generation, achieving high-resolution spectra of NO${_2}$ with excellent SNR. The method offers high-frequency accuracy and demonstrates the potential of Yb-doped systems for multiplexed metrology, effectively extending the capabilities of DCS as a powerful tool for multi-disciplinary applications. |
| Document Type: |
Working Paper |
| Access URL: |
http://arxiv.org/abs/2412.05972 |
| Accession Number: |
edsarx.2412.05972 |
| Database: |
arXiv |
