Progress and Perspectives in Squeezing
A very successful way to produce squeezed light has been to use parametric generation in a crystal having a second order type non-linearity. In parametric generation, a single pump photon is down-converted into a pair of simultaneous photons. Degenerate parametric generation in a cavity has been shown to yield a high amount of quadrature squeezed light1. Non degenerate parametric generation gives rise to “twin” beams, presenting a high degree of quantum intensity correlation. The fluctuations in the intensity difference between two such fields is reduced below the standard quantum limit2.
KeywordsNoise Reduction Shot Noise Optical Parametric Oscillator Noise Spectrum Excess Noise
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