Ultra-stable microwave cryogenic oscillator operated with a Gifford-McMahon cryocooler
Ultra-stable microwave cryogenic oscillator operated with a Gifford-McMahon cryocooler
We demonstrate for the first time an ultra-stable microwave cryogenic oscillator operated with a Gifford-McMahon (GM) cryocooler. Despite the high level of vibration generated by the GM, we show that an optimised design, with simple passive solutions, enables a sufficient mechanical decoupling to achieve a state-of-the-art frequency stability. The implemented 10 GHz cryogenic oscillator features a fractional frequency stability (ADEV, Allan deviation)