Phase Noise Characterization of Cr:ZnS Frequency Comb using Subspace Tracking

Aleksandr Razumov, Sergey Vasilyev, Jasper Riebesehl, Holger R. Heebøll, Francesco Da Ros, Darko Zibar

Research output: Contribution to conferencePaperResearchpeer-review

Abstract

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 rad^2/Hz), and are thereby not identifiable.
Original languageEnglish
Publication date2024
DOIs
Publication statusPublished - 2024
EventCLEO: Fundamental Science 2024
- Charlotte Convention Center, Charlotte, United States
Duration: 5 May 202410 May 2024

Conference

ConferenceCLEO: Fundamental Science 2024
LocationCharlotte Convention Center
Country/TerritoryUnited States
CityCharlotte
Period05/05/202410/05/2024

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