基于低频压缩光的声频信号测量
发布时间：2019-01-27 15:38
【摘要】：低频信号测量在引力波探测、生物成像及磁场测量等方面具有重要的应用价值.本文利用非简并光学参量放大器获得了低频压缩态光场,在频率19 kHz处直接测到的压缩度为(7.1±0.1)dB;将产生的正交位相压缩态光场注入到马赫-曾德尔干涉仪中,实现了超越散粒噪声极限(3.0±0.4)dB的声频相位信号的测量.本实验的开展为低频压缩光的产生及基于低频压缩光的声频信号测量提供了一定技术支撑,并且此技术有望扩展到磁场、空间小位移等其他物理量的量子精密测量方案中.
[Abstract]:Low frequency signal measurement has important application value in gravitational wave detection, biological imaging and magnetic field measurement. In this paper, the low frequency squeezed state light field is obtained by using a nondegenerate optical parametric amplifier. The squeezing degree measured directly at the frequency of 19 kHz is (7.1 卤0.1) dB;. The generated quadrature phase squeezed state light field is injected into the Mach Zehnder interferometer, and the measurement of the audio phase signal beyond the shot noise limit (3. 0 卤0. 4) dB is realized. The development of this experiment provides a technical support for the generation of low-frequency compressed light and the measurement of audio signal based on low-frequency compression light, and this technique is expected to be extended to the quantum precision measurement scheme of other physical quantities such as magnetic field, small spatial displacement and so on.
【作者单位】： 山西大学光电研究所量子光学与光量子器件国家重点实验室极端光学协同创新中心;
【基金】：国家自然科学基金(批准号:61405108,11674205,11604189);国家自然科学基金重点项目(批准号:91536222) 国家重点研发计划(批准号:2016YFA0301404) 国家高技术研究发展计划(批准号:2015AA8112008) 山西省高校科技创新项目(批准号:2015103)资助的课题~~
【分类号】：O432.2
本文编号：2416405
[Abstract]:Low frequency signal measurement has important application value in gravitational wave detection, biological imaging and magnetic field measurement. In this paper, the low frequency squeezed state light field is obtained by using a nondegenerate optical parametric amplifier. The squeezing degree measured directly at the frequency of 19 kHz is (7.1 卤0.1) dB;. The generated quadrature phase squeezed state light field is injected into the Mach Zehnder interferometer, and the measurement of the audio phase signal beyond the shot noise limit (3. 0 卤0. 4) dB is realized. The development of this experiment provides a technical support for the generation of low-frequency compressed light and the measurement of audio signal based on low-frequency compression light, and this technique is expected to be extended to the quantum precision measurement scheme of other physical quantities such as magnetic field, small spatial displacement and so on.
【作者单位】： 山西大学光电研究所量子光学与光量子器件国家重点实验室极端光学协同创新中心;
【基金】：国家自然科学基金(批准号:61405108,11674205,11604189);国家自然科学基金重点项目(批准号:91536222) 国家重点研发计划(批准号:2016YFA0301404) 国家高技术研究发展计划(批准号:2015AA8112008) 山西省高校科技创新项目(批准号:2015103)资助的课题~~
【分类号】：O432.2
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