The efficiency of parametric multiphoton frequency conversion in a stochastic pumping field

N. A. Iskanderov, Vladimir A. Kudryashov, I. N. Matveev +1 more

Nikolai E. Kornienko, M. F. Kornienko, A. P. Naumenko +1 more

Timothy E. Keller

Gagik Yu. Kryuchkyan, Naira T. Muradyan

Yunfei Bai, Junxiang Zhang, Shi-Yao Zhu

By utilizing the nondegenerate optical parametric amplifier, the quantum state transfer from a pump state with high frequency to a signal state of lower frequency is studied theoretically. The noiseless state transfer is characterized by frequency conversion efficiency and noise figure. It is shown that the quantum state can be well preserved during the frequency conversion as long as the optical parametric amplifier is operated far below the threshold, and meanwhile injected with an input idler field with a power density about ten times greater than that of the pump. The dependence of the noise figure and conversion efficiency on the idler amplitude, the analyzing frequency and the cavity extra loss is also discussed.

Haoqin Tang, W. Happer

Parametric frequency conversion of resonance radiation in an optically pumped atomic vapor has been observed for the first time. Conversion efficiencies of ${10}^{\ensuremath{-}3}$ have already been observed in ${\mathrm{Rb}}^{87}$ vapor, and considerably higher conversion efficiencies should be attainable.