Modulation transfer spectroscopy mediated by spontaneous emission

Abstract

We report the polarization dependence of the spectrum in modulation transfer spectroscopy for the transitions from the lower ground state (F(g) = 1) of (87)Rb atoms. We measured the spectra for the two polarization configurations where the carrier and probe beams were linearly polarized in parallel or perpendicular directions. The measured spectra were in excellent agreement with calculated results. The spectra were strongly dependent on the polarization configurations. In particular, the signal for parallel polarization configuration was generated via an incoherent process mediated by spontaneous emission.

Magnetic-enhanced modulation transfer spectroscopy and laser locking for 87Rb repump transition

“…Still, the signal amplitude is small compared with ours. It should be noted that the MTS signal for this parallel configuration is not a strict fourwave mixing process as discussed in Section II, but an incoherent process mediated by spontaneous emission [39]. However, as the stray magnetic fluctuation would disturb the light transition, rigid magnetic shielding is demanding.…”

Three-photon coherence in a ladder-type atomic system

“…In this case we would need a numerical calculation instead of the analytical calculation. We refer to previous publications for the method of calculation of the oscillation frequencies [26][27][28]. When N -photon interactions are taken into account, the optical ρ 23 and ρ 13 are explicitly given by…”

Theoretical and Experimental Study of Optimization of Polarization Spectroscopy for the D2 Closed Transition Line of 87Rb Atoms

“…Many atomic, molecular, and optical physicists use laser spectroscopy to stabilize the laser frequency in their studies concerning laser cooling and the trapping of neutralatoms and ions, metrology, atomic clock, quantum simulation with ultracold atoms, etc. The most commonly used laser spectroscopic systems are saturated absorption spectroscopy (SAS) [1][2][3][4], polarization spectroscopy (PS) [5][6][7], dichroic atomic vapor laser lock (DAVLL) [8,9], sub-Doppler DAVLL [10][11][12][13], modulation transfer spectroscopy (MTS) [14][15][16], and frequency modulation spectroscopy (FMS) [17][18][19]; of these, PS can directly obtain a dispersive-like signal through the differential signal of a photodetector. It is the most inexpensive spectroscopic system that can be used for laser frequency stabilization because it requires fewer electronics.…”