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Cryogenic sapphire oscillator using a low- vibration design pulse-tube cryocooler: first results

机译:采用低振动设计的脉冲管低温冷却器的低温蓝宝石振荡器:第一结果

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A cryogenic sapphire oscillator (CSO) has been implemented at 11.2 GHz using a low-vibration design pulsetube cryocooler. Compared with a state-of-the-art liquid helium cooled CSO in the same laboratory, the square root Allan variance of their combined fractional frequency instability is <3;y = 1.4 × 10-15r-1/2 for integration times 1 ȦA; r ȦA; 10 s, dominated by white frequency noise. The minimum <3;y = 5.3 × 10-16 for the two oscillators was reached at r = 20 s. Assuming equal contributions from both CSOs, the single oscillator phase noise S0 Ȥ8; -96 dB.rad2/Hz at 1 Hz set from the carrier.
机译:使用低振动设计的脉冲管低温冷却器在11.2 GHz处实现了低温蓝宝石振荡器(CSO)。与同一实验室中最新技术的液氦冷却CSO相比,其组合分数频率不稳定性的平方根艾伦方差<3; y = 1.4 ƒƒ– 10-15r-1积分时间为1 1A时为/ 2; rȦA; 10 s,以白频噪声为主。两个振荡器的最小值<3; y = 5.3×10-16 —在r = 20 s时达到。假设两个CSO的贡献相等,则单振荡器相位噪声S0Ȥ8;从载波设置为-96 dB.rad2 / Hz在1 Hz下。

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