Ultra-low noise 1 GHz Yb:CaF2 laser for dual-comb LiDAR

J. Pupeikis; H. Soghomonyan; B. Willenberg; L. Lang; C. R. Phillips; U. Keller

doi:10.1117/12.3002235

13 March 2024 Ultra-low noise 1 GHz Yb:CaF₂ laser for dual-comb LiDAR

J. Pupeikis, H. Soghomonyan, B. Willenberg, L. Lang, C. R. Phillips, U. Keller

Proceedings Volume PC12864, Solid State Lasers XXXIII: Technology and Devices; PC128640H (2024) https://doi.org/10.1117/12.3002235
Event: SPIE LASE, 2024, San Francisco, California, United States

Conference Poster

Abstract

Free-running single-cavity dual-comb lasers offer cost-effective, high-performance solutions to dual-comb LiDAR. Precision requires ultra-low timing jitter whereas high sampling-speeds require ⪆1-GHz oscillators which often exhibit increased jitter. We address this challenge by exploring Yb:CaF2-based solid-state lasers optimized for ultra-low high-frequency noise. Such oscillators already demonstrated ultra-low noise but scaling to 1 GHz repetition rates faced challenges because of low gain crystal nonlinearities and Q-switching-induced damage of the SESAM susceptibility to Q-switching damage. Overcoming this, our in-house produced SESAM and optimized laser design enabled self-starting and, robust soliton modelocking at 1 GHz, with excellent performance, and timing-jitter power spectral density reaching 7e-5 fs2/Hz offset frequency of 10 kHz. Our platform shows promise for high-precision phase-sensitive dual-comb applications.

Citation Download Citation

J. Pupeikis, H. Soghomonyan, B. Willenberg, L. Lang, C. R. Phillips, and U. Keller "Ultra-low noise 1 GHz Yb:CaF₂ laser for dual-comb LiDAR", Proc. SPIE PC12864, Solid State Lasers XXXIII: Technology and Devices, PC128640H (13 March 2024); https://doi.org/10.1117/12.3002235

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