Four-wave mixing in the diamond configuration in an atomic vapor

Abstract

We present measurements of the resonance structure for nondegenerate four-wave mixing ͑4WM͒ in the diamond configuration in a warm atomic vapor of rubidium. We show that a narrow sub-Doppler feature exists and can be understood as a result of velocity-class selection. We measure the efficiency of the 4WM process and show it to be on the order of 1 ϫ 10 −4 . Our observations are consistent with the results of a theoretical treatment based on the semiclassical Maxwell-Bloch equations for the system with the appropriate coupling values derived from the experimental values in Rb.

Correlated photon pairs generated from a warm atomic ensemble

“…The photons are created in a laser-pumped warm atomic ensemble (isotopically pure 85 Rb) using a four-wave mixing (FWM) interaction that is resonantly enhanced by the diamond energy level structure [14,15] shown in Fig. 1.…”

Efficient infrared upconversion via a ladder-type atomic configuration

“…In these works, two lasers with wavelength of 794.3 nm and a laser with wavelength of 852.2 nm are used to generate a field at 852.2 nm. Willis et al performed a FWM experiment in a diamond-type atomic level configuration in a warm rubidium (Rb) vapor [10]. In their experiment, three lasers with wavelengths of 780 nm, 795 nm and 1324 nm were used to generate a field at 1367 nm.…”

Propagation dynamics of controlled cross-talk via interplay betweenχ(1)andχ(3Hsu1, Welch2, Gord3 et al. 2011Phys. Rev. A140100View full textAdd to dashboardCite

“…Clearly, the cross-talk between the two components of the probe field p± (z) can be controlled via the amplitude ( d± ) as well as the phase of the two drive fields (considering the complex Rabi frequencies α * β ) as shown in Eq. (14). To extract the physical meaning from the above equations, we analyze Eqs.…”

“…With an additional control field coupling to a fourth atomic level, the χ (3) process can significantly affect the dispersion [6] and absorption [7,8] properties of the probe field. The efficient parametric generation of a four wave-mixing (FWM) field using the resonant χ (3) process in a four-level double-ladder atomic system has been recently demonstrated [6,[8][9][10][11][12][13][14]. In particular, this system allows efficient frequency up-conversion [10][11][12] and down-conversion [13,14] through the use of low-power continuous-wave lasers that can be used for ultraviolet generation and quantum communication [11][12][13][14].…”

“…The efficient parametric generation of a four wave-mixing (FWM) field using the resonant χ (3) process in a four-level double-ladder atomic system has been recently demonstrated [6,[8][9][10][11][12][13][14]. In particular, this system allows efficient frequency up-conversion [10][11][12] and down-conversion [13,14] through the use of low-power continuous-wave lasers that can be used for ultraviolet generation and quantum communication [11][12][13][14]. Previous experimental and theoretical studies of the double-ladder system have also revealed many remarkable properties that are sensitive to the phase and amplitude of the control laser and can be used for polarization control and laser-frequency stabilization [15][16][17][18][19][20][21][22][23].…”