论文标题
激光强度抑制抑制音频频率795 nm的弹性真空状态D1线的光线
Laser Intensity Noise Suppression for Preparing Audio-Frequency 795 nm Squeezed Vacuum State of Light at Rubidium D1 Line
论文作者
论文摘要
激光强度抑制抑制激光对基于亚阈值光学参数振荡器（OPO）的音频挤压真空状态的准备和表征具有重要影响紫外线（UV）激光器由空腔增强的频率加倍产生。典型的峰值峰激光强度波动波动波动率在半小时内，带宽为$ \ sim10 $ kHz已从$ \ pm7.45 $ \％$ \％$ \％$ \％到$ \ pm06 $ \ pm0.06 $ \％\％for 795 nm nir laster and laster。 $ \ pm9.04 $$ \％$ to $ \ pm0.05 $$ \％$ $ \％$分别用于397.5 nm紫外线激光光束。用PPKTP晶体制备的795 nm挤压真空状态的挤压水平已从-3.3到-4.0 dB左右，大约3 $ \ sim $ 9 kHz的音频分析频率范围。
Laser intensity noise suppression has essential effects on preparation and characterization of the audio-frequency squeezed vacuum state of light based on a sub-threshold optical parametric oscillator (OPO).We have implemented two feedback loops by using relevant acousto-optical modulators (AOM) to stabilize the intensity of 795-nm near infrared (NIR) fundamental laser and 397.5-nm ultraviolet (UV) laser generated by cavity-enhanced frequency doubling.Typical peak-to-peak laser intensity fluctuation with a bandwidth of $\sim10$ kHz in a half hour has been improved from $\pm7.45$$\%$ to $\pm0.06$$\%$ for 795-nm NIR laser beam, and from $\pm9.04$$\%$ to $\pm0.05$$\%$ for 397.5-nm UV laser beam, respectively. The squeezing level of the squeezed vacuum state at 795 nm prepared by the sub-threshold OPO with a PPKTP crystal has been improved from -3.3 to -4.0 dB around 3$\sim$9 kHz of audio analysis frequency range.
