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Fully phase-stabilized 1 GHz turnkey frequency comb at 1.5 μm



Daniel Lesko, Alexander Lind, Nazanin Hoghooghi, Abijith S. Kowligy, Henry R. Timmers, Pooja Sekhar, Benjamin Rudin, Florian Emaury, Gregory B. Rieker, Scott Diddams


Low noise and high repetition rate optical frequency combs have been desirable for many applications from timekeeping to precision spectroscopy. With higher power per comb mode, gigahertz repetition rates enable rapid spectroscopic sensing in a dual-comb modality as well as measurements with higher signal-to-noise ratio. In this paper, we present the frequency stabilization and characterization of a turnkey commercial 1 GHz mode-locked laser that operates at 1.5 μm telecom wavelengths. Fiber amplification and spectral broadening result in the stabilization of f ceo with 430 mrad of residual phase noise. Simultaneously, we stabilize the beat between a comb mode and a continuous-wave laser at 1550 nm to have 41 mrad of residual phase noise (integrated from 10^2-10^7 Hz). This robust comb system is built with off-the-shelf polarization-maintaining fiber components and should be useful for a wide range of frequency comb applications that benefit from low noise and the 1 GHz repetition rate.
OSA Continuum


Frequency Comb, Laser Stabilization, Precision Measurement, Ultrafast Lasers


Lesko, D. , Lind, A. , Hoghooghi, N. , Kowligy, A. , Timmers, H. , Sekhar, P. , Rudin, B. , Emaury, F. , Rieker, G. and Diddams, S. (2021), Fully phase-stabilized 1 GHz turnkey frequency comb at 1.5 μm, OSA Continuum, [online], (Accessed April 20, 2024)
Created March 15, 2021, Updated April 6, 2021