2024/09/03 by Aleksandr Razumov, Sergey Vasilyev, Razumov, Aleksandr +11 · 1 citation
Engineering · Physics and Astronomy · #Acoustic Wave Resonator Technologies #Advanced Fiber Optic Sensors #FOS: Electrical engineering #FOS: Physical sciences #Mechanical and Optical Resonators #Optics (physics.optics) #Signal Processing (eess.SP) #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.2409.01850
openalex publication_date 2024/09/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present a comprehensive phase noise characterization of a mid-IR Cr:ZnS frequency comb. Despite their emergence as a platform for high-resolution dual-comb spectroscopy, detailed investigations into the phase noise of Cr:ZnS combs have been lacking. To address this, we use a recently proposed phase noise measurement technique that employs multi-heterodyne detection and subspace tracking. This allows for the measurement of the common mode, repetition-rate and high-order phase noise terms, and their corresponding scaling as a function of a comb-line number, using a single measurement set-up. We demonstrate that the comb under test is dominated by the common mode phase noise, while all the other phase noise terms are below the measurement noise floor (~ -120 dB rad2/Hz), and are thereby not identifiable.