Citation
Abstract
We present the design for a new short-term frequency standard, the voltagecontrolled sapphire oscillator, as a practical and lower-cost alternative to a cryogenic sapphire oscillator operating at liquid helium temperatures. Performance goals are a frequency stability of 1×10−14 (1 second ≤ τ ≤ 100 seconds), more than 2 years of continuous operation, and practical operability. Key elements include the sapphire resonator, low-power and long-life cryocooler, frequency compensation method, and cryo-Pound design. We report the design verification, experimental results, and test results of the cryocooler environmental sensitivity, as well as a preliminary stability measurement.
Keywords
oscillator
sapphire oscillator
voltage-controlled sapphire oscillator
Details
- Volume
- 42-170
- Published
- August 15, 2007
- Pages
- 1–15
- File Size
- 684.3 KB