Maser oscillation in a whispering-gallery-mode microwave resonator -: art. no. 224104
Maser oscillation in a whispering-gallery-mode microwave resonator -: art. no. 224104
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DOI：
10.1063/1.2137452
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发表时间：
2005-11-28
影响因子：
4
通讯作者：
Oxborrow, M
中科院分区：
文献类型：
--
作者：
Bourgeois, PY;Bazin, N;Oxborrow, M
我们报道了在一个回音壁（WG）模谐振腔中观察到的阈上脉泽振荡，该谐振腔的准横磁、方位角17阶WG模，频率约为12.038 GHz，负载Q值为数亿，支撑在单晶蓝宝石圆柱体上。与以十亿分之几的有效浓度替代地包括在蓝宝石内的Fe 3+离子相关联的电子自旋共振在频率上与（相当窄的）WG模式的频率一致。通过在大约31.34 GHz的频率下向谐振器施加连续波“泵浦”，而不施加直流磁场，WG（“信号”）模式通过三电平脉泽方案被激励。初步测量表明，采样间隔高达100 s的频率稳定性（艾伦偏差）的几倍10（-14）。(c)2005年美国物理学会。
We report the observation of above-threshold maser oscillation in a whispering-gallery (WG)-mode resonator, whose quasitransverse-magnetic, 17th-azimuthal-order WG mode, at a frequency of approximately 12.038 GHz, with a loaded Q of several hundred million, is supported on a cylinder of monocrystalline sapphire. An electron spin resonance associated with Fe3+ ions, that are substitutively included within the sapphire at an effective concentration of a few parts per billion, coincides in frequency with that of the (considerably narrower) WG mode. By applying a cw "pump" to the resonator at a frequency of approximately 31.34 GHz, with no applied dc magnetic field, the WG ("signal") mode is energized through a three-level maser scheme. Preliminary measurements demonstrate a frequency stability (Allan deviation) of a few times 10(-14) for sampling intervals up to 100 s. (c) 2005 American Institute of Physics.