High-efficiency squeezed light generation for gravitational wave detectors
High-efficiency squeezed light generation for gravitational wave detectors
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DOI：
10.1088/1361-6382/aaf448
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发表时间：
2018-12
影响因子：
3.5
通讯作者：
M. Mehmet;H. Vahlbruch
中科院分区：
文献类型：
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作者：
M. Mehmet;H. Vahlbruch
强压缩真空态的工程是降低引力波探测器量子噪声的一项关键技术。我们报道了在10-100 kHz的频率范围内，在1064 nm波长下观察到了高达12.0分贝的压缩真空态。这是迄今为止在该探测波段内报道的最强烈的挤压。在半单片驻波腔光参量放大器中产生了对基频光场和谐波光场有共振作用的压缩态。我们选择了适当的反射率，以获得所需的泵浦功率显著降低，仅为8.6 mW。我们的分析表明，测量的残余相位噪声小于3.5mrad RMS，压缩光源为下游应用提供了高达14d B的压缩。该实验在所有相关自由度上都是电子稳定的，证明了线性、双谐振腔拓扑结构对当前和未来的引力波探测器的适用性。
The engineering of strongly squeezed vacuum states of light is a key technology for the reduction of quantum noise in gravitational wave detectors. We report on the observation of up to 12.0 dB squeezed vacuum states of light at the wavelength of 1064 nm in the frequency band from 10 Hz to 100 kHz. This is the strongest squeezing reported to date within this detection band. The squeezed states were generated in a half-monolithic, standing-wave cavity optical parametric amplifier, which was resonant for the fundamental and harmonic light fields. We chose appropriate reflectivities to obtain a significant reduction of the required pump power, which was 8.6 mW only. Our analysis revealed that the residual measurement phase noise was smaller than 3.5 mrad rms and that the squeezed light source provided up to 14 dB of squeezing for a downstream application. The experiment was electronically stabilized in all relevant degrees of freedom, demonstrating the applicability of the linear, doubly resonant cavity topology for current and future gravitational wave detectors.