| Issue |
EPJ Web Conf.
Volume 335, 2025
EOS Annual Meeting (EOSAM 2025)
|
|
|---|---|---|
| Article Number | 03049 | |
| Number of page(s) | 2 | |
| Section | Topical Meeting - Applications of Optics and Photonics | |
| DOI | https://doi.org/10.1051/epjconf/202533503049 | |
| Published online | 22 September 2025 | |
https://doi.org/10.1051/epjconf/202533503049
Ultra-Stable Broadband Comb Laser with Tunable Free Spectral Range and Spectra
Institute of Quantum Optoelectronics, ETH Zurich, 8092 Zurich, Switzerland
Institute of Electromagnetic Fields (IEF), ETH Zurich, 8092 Zurich, Switzerland
* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published online: 22 September 2025
Abstract
We present a novel near-infrared broadband, flat-top optical frequency comb spanning 1.6 THz. This comb is generated using an interband gain medium operated in an ultrafast gain recovery regime within a unidirectional ring cavity. The remarkable stability of our approach is evidenced by a 1 Hz RF linewidth. The injected RF signal not only governs the spectral bandwidth and free spectral range but also tailors the comb’s spectral shape—a feat achieved by simultaneously injecting multiple modulation tones. This advanced level of control opens promising avenues for applications in communication, sensing, and ranging, where precise and stable frequency lines are essential for performance and reliability.
© The Authors, published by EDP Sciences, 2025
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