Non-Linear Atom-Laser Interactions Using Rubidium Pump-Probe Spectroscopy

Authors

Grace Neil, Embry-Riddle Aeronautical UniversityFollow

Faculty Mentor

Bereket Berhane

Abstract

An experiment was performed to demonstrate the pump-probe spectroscopy of Rubidium (Rb) vapor, revealing the nonlinear atom-laser interactions in the 5S1/2 ↔ 5D5/2 transition in Rb that can be used to generate quantum entanglement between two laser beams. The setup included a tunable infrared diode laser, optical mirrors, photodiode-detectors, a beam-splitter, and a temperature- regulated rubidium gas chamber, all of which are controlled by the TeachSpin laser controller and monitor. The output from the laser-diode was split into a pump (90%) and a signal probe (10%), which intersected in counter-propagating directions inside the Rubidium chamber. The analysis shows that in the presence of the pump, the signal transmission increases significantly near the resonant transition frequency. This result demonstrates the non-linear interactions of the 2 laser beams inside the Rubidium chamber, which can be used to demonstrate quantum entanglement between 2 photons.

Recommended Citation

Neil, Grace (2025) "Non-Linear Atom-Laser Interactions Using Rubidium Pump-Probe Spectroscopy," Beyond: Undergraduate Research Journal: Vol. 8 , Article 12.
Available at: https://commons.erau.edu/beyond/vol8/iss1/12