掺钛低温蓝宝石谐振振荡器

Y. Kersalé, N. Boubekeur, J. Hartnett, M. Tobar, N. Bazin, V. Giordano
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引用次数: 4

摘要

高质量蓝宝石晶体中存在顺磁杂质残留。利用这一现象在液氦温度下作为顺磁自旋补偿,构建了高Q低温蓝宝石谐振振荡器(CSRO)。本文介绍了有意掺杂Ti3+和Ti4+的蓝宝石谐振振荡器的特性。对于Ti3+谐振器,我们使用工作在34K的12.7 GHz模式。在使用Gifford-McMahon制冷机作为冷源的情况下,该谐振器在8s < tau < 20s内具有2 × 10-3阶的频率稳定性。这相当于最先进的10 -7等分线。用脉冲管制冷机进行的第二次实验表明,短期频率稳定性有所改善。13.8 GHz的Ti4+谐振振荡器在tau = 16s时的频率稳定性为7倍10-14
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Titanium doped cryogenic sapphire resonator oscillators
Residual paramagnetic impurities are present in high quality sapphire crystal. This phenomenon was exploited as paramagnetic spin compensation at liquid helium temperature to build high Q cryogenic sapphire resonator oscillators (CSRO). In this paper we present the characterization of intentionally Ti3+ and Ti4+ doped sapphire resonator oscillators. For the Ti3+ resonator we used the 12.7 GHz mode operating at 34K. This resonator exhibited a frequency stability of order 2 times 10-3 for 8s < tau < 20s with the use of a Gifford-McMahon cryocooler as a cold source. This corresponds to state-of-the-art line splitting of the order of 10 -7. A second experiment with a pulse tube cryocooler shows an improvement in the short term frequency stability. The Ti4+ resonator oscillator at 13.8 GHz exhibited a frequency stability of 7 times 10-14 at tau = 16s
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