Phase Noise Characterization of Cr:ZnS Frequency Comb using Subspace Tracking
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866910588444082176 |
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| author | Razumov, Aleksandr Vasilyev, Sergey Mirov, Mike Riebesehl, Jasper Heebøll, Holger R. Da Ros, Francesco Zibar, Darko |
| author_facet | Razumov, Aleksandr Vasilyev, Sergey Mirov, Mike Riebesehl, Jasper Heebøll, Holger R. Da Ros, Francesco Zibar, Darko |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_01850 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Phase Noise Characterization of Cr:ZnS Frequency Comb using Subspace Tracking Razumov, Aleksandr Vasilyev, Sergey Mirov, Mike Riebesehl, Jasper Heebøll, Holger R. Da Ros, Francesco Zibar, Darko Optics Signal Processing 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. |
| title | Phase Noise Characterization of Cr:ZnS Frequency Comb using Subspace Tracking |
| topic | Optics Signal Processing |
| url | https://arxiv.org/abs/2409.01850 |