Coherence analysis of tightly locked mid-infrared quantum cascade laser frequency combs
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2023
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866913351915798528 |
|---|---|
| author | Parriaux, Alexandre Komagata, Kenichi N. Bertrand, Mathieu Wittwer, Valentin J. Faist, Jérôme Südmeyer, Thomas |
| author_facet | Parriaux, Alexandre Komagata, Kenichi N. Bertrand, Mathieu Wittwer, Valentin J. Faist, Jérôme Südmeyer, Thomas |
| contents | Frequency combs are powerful tools for many applications and high performances are achieved by stabilizing these lasers. For operation in the mid-infrared, quantum cascade lasers (QCL) are ideal candidates as they present numerous advantages. However, stabilized QCL-combs lack of a detailed characterization of their noise properties due to the sensitivity limits of current analyzing techniques. To overcome these challenges, we developed what we believe to be the first tightly locked dual QCL-comb system. Its use is twofold. First, phase noise analysis of the dual-comb signal shows residual phase noise below 600 mrad for all comb lines, and we characterize the comb coherence as well as the performances of the repetition frequency locking mechanism. Second, we demonstrate coherent averaging with a $7 \times 10^5$ Hz$^{1/2}$ figure-of-merit system, which is compatible with high precision spectroscopy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_04820 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Coherence analysis of tightly locked mid-infrared quantum cascade laser frequency combs Parriaux, Alexandre Komagata, Kenichi N. Bertrand, Mathieu Wittwer, Valentin J. Faist, Jérôme Südmeyer, Thomas Optics Frequency combs are powerful tools for many applications and high performances are achieved by stabilizing these lasers. For operation in the mid-infrared, quantum cascade lasers (QCL) are ideal candidates as they present numerous advantages. However, stabilized QCL-combs lack of a detailed characterization of their noise properties due to the sensitivity limits of current analyzing techniques. To overcome these challenges, we developed what we believe to be the first tightly locked dual QCL-comb system. Its use is twofold. First, phase noise analysis of the dual-comb signal shows residual phase noise below 600 mrad for all comb lines, and we characterize the comb coherence as well as the performances of the repetition frequency locking mechanism. Second, we demonstrate coherent averaging with a $7 \times 10^5$ Hz$^{1/2}$ figure-of-merit system, which is compatible with high precision spectroscopy. |
| title | Coherence analysis of tightly locked mid-infrared quantum cascade laser frequency combs |
| topic | Optics |
| url | https://arxiv.org/abs/2311.04820 |