Cross-Spectrum Phase Noise Measurements of 10<sup>-15</sup>-Level Stability Photonic Microwave Oscillators
We present in this paper the characterization of state-of-the-art photonic microwave oscillators by using a commercial cross-correlation-based phase noise analyzer and two auxiliary commercial oscillators of the same type. These X-band frequency sources exhibit a fractional frequency stability of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$<4 \times 10^{-15}$</tex> at 1 s, with phase noise as low as <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$<-90 \text{dBc} / \text{Hz}$</tex> at 1 Hz and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$<-150 \text{dBc} / \text{Hz}$</tex> at 1 kHz offset from a 10 GHz carrier. Conventional instruments typically do not permit to reveal this level of fidelities. We show the use of a digital system and two auxiliary independent ultrastable sources to enable cross-correlation measurements within minutes for this level of spectral purity and frequency stability.
Authors
- Jan Schorer
- Sebastian Pucher (ORCID: https://orcid.org/0000-0001-5559-0114)
- Ronald Holzwarth (ORCID: https://orcid.org/0000-0002-1589-8496)
- Benjamin Rauf (ORCID: https://orcid.org/0000-0001-9934-5022)
- Michele Giunta (ORCID: https://orcid.org/0000-0002-7388-5095)
- Wolf-Michael Wendler
- M. L. Fischer (ORCID: https://orcid.org/0000-0001-7956-2361)
- Simon Afrem
- Alexander Röth (ORCID: https://orcid.org/0000-0002-5975-0573)
- J. Schulz (ORCID: https://orcid.org/0000-0001-8031-4189)
- Stefan Peschl
- Jacques Kornprobst
Institutions
- Rohde & Schwarz (Germany) (DE)
- Hensoldt (Germany) (DE)
- Menlo Systems (Germany) (DE)
Publication Details
- Published
- 2025-06-15
- DOI
- https://doi.org/10.1109/ims40360.2025.11103821
- Citations
- 1
- Primary Topic
- Advanced Fiber Laser Technologies
- Type
- article
- Field-Weighted Citation Impact
- 1.25