3rd generation laser interferometric gravitational wave detector using squeezed light

利用非线性光学晶体产生的二阶非线性效应，我们实现了8-dB压缩真空的产生。将压缩真空注入干涉仪的暗口，可以使散粒噪声降低2dB。这是第一次使用压缩光实际演示引力波探测器中的散粒噪声降低。

Applying 2nd order nonlinear effect produced by the nonlinear optical crystal, we have achieved in the generation of the 8-dB squeezed vacuum. Injecting the squeezed vacuum into the dark port of the interferometer, we could reduce the shot-noise level by 2dB. This is the first practical demonstration of the shot-noise reduction in the gravitational-wave detector using squeezed light.