Cryogenic sapphire oscillator with exceptionally high long-term frequency stability

Abstract

We report on the development of a sapphire cryogenic microwave resonator oscillator long-term fractional frequency stability of 2x10^-17Sqrt[τ] for integration times τ>10^3 s and negative drift of about 2.2x10^-15/day. The short-term frequency instability of the oscillator is highly reproducible and also state-of-the-art: 5.6x10^-16 for an integration time of τ~ 20 s.

Accepted for publication in Applied Physics Letters

References in corpus (4)

• A Search for Variations of Fundamental Constants using Atomic Fountain Clocks
• Cold atom Clocks and Applications
• Test of Lorentz Invariance in Electrodynamics Using Rotating Cryogenic Sapphire Microwave Oscillators
• Improved Test of Lorentz Invariance in Electrodynamics

Cited by in corpus (27)

• Ultra-low noise microwave generation with fiber-based optical frequency comb and application to atomic fountain clock
• Ultra-Low Noise Microwave Extraction from Fiber-Based Optical Frequency Comb
• Ultra-low-phase-noise cryocooled microwave dielectric-sapphire-resonator oscillators with 1 x 10^-16 frequency instability
• Experimental Implementations of Cavity-Magnon Systems: from Ultra Strong Coupling to Applications in Precision Measurement
• Searches for topological defect dark matter via non-gravitational signatures
• High Q-factor Sapphire Whispering Gallery Mode Microwave Resonator at Single Photon Energies and milli-Kelvin Temperatures
• Colloquium: Comparison of Astrophysical and Terrestrial Frequency Standards
• Adapting a Cryogenic Sapphire Oscillator for Very Long Baseline Interferometry
• Measurement of fundamental thermal noise limit in a cryogenic sapphire frequency standard using bimodal maser oscillations
• Resonator with ultra-high length stability as a probe for Equivalence-Principle-violating physics
• Ultra-low vibration pulse-tube cryocooler stabilized cryogenic sapphire oscillator with 10^-16 fractional frequency stability
• Long Term Operation and Performance of Cryogenic Sapphire Oscillators
• Cryogenic Sapphire Oscillator using a low-vibration design pulse-tube cryocooler: First results
• Discovery of Bragg confined hybrid modes with high Q-factor in a hollow dielectric resonator
• Single Crystal Sapphire at milli-Kelvin Temperatures: Observation of Electromagnetically Induced Thermal Bistability in High Q-factor Whispering Gallery Modes
• Creating traveling waves from standing waves from the gyrotropic paramagnetic properties of Fe${}^{3+}$ ions in a high-Q whispering gallery mode sapphire resonator
• Electromagnetic properties of polycrystalline diamond from 35K to room temperature and microwave to terahertz frequencies
• New Atomic probes for Dark Matter detection: Axions, Axion-like particles and Topological Defects
• Resonator Power to Frequency Conversion in a Cryogenic Sapphire Oscillator
• Probing Dark Universe with Exceptional Points
• High Resolution Flicker-Noise-Free Frequency Measurements of Weak Microwave Signals
• Generation of Spectrally Pure Microwave Signals
• Mechanical loss and stability analysis of NEXCERA in ultra-stable optical cavities
• The stability of an optical clock laser transferred to the interrogation oscillator for a Cs fountain
• Ultra stable and very low noise signal source using a cryocooled sapphire oscillator for VLBI
• Widely tunable optoelectronic oscillator based on selective parity-time-symmetry breaking
• Unprecedented High Long Term Frequency Stability with a Macroscopic Resonator Oscillator