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Title: Time-delayed probe spectroscopy in two-photon--pumped systems

Abstract

We study transients in resonantly coupled three-level systems. Two of the levels are coupled by intense two-photon pumping, and the third one provides a probing level. Adiabatically eliminated levels appear in effective system parameters. Experimentally, this model is applicable, e.g., in resonantly enhanced parametric and harmonic generation in atomic vapors. A distinguishing feature in the system is the appearance of ac Stark shifts in the probe spectra when pumping at the two-photon resonance. The nutation signal is shown to give information on the effective two-photon Rabi frequency and on the decay rate of the dipole-forbidden two-photon coherence. Free-induction decay is strongly dominated by population-induced effects; Raman-like peaks introduced by Stark shifts may show large instantaneous gain. Gaussian pump pulses are investigated to investigate effects arising from the temporal sweeping of the two-photon Rabi flipping and the modulation of the Stark shifts. The results also provide relevant information on the gain dynamics of coherently pumped lasers.

Authors:
; ;
Publication Date:
Research Org.:
Max-Planck-Institut fuer Quantenoptik, D-8046 Garching bei Muenchen, Federal Republic of Germany
OSTI Identifier:
5310598
Resource Type:
Journal Article
Journal Name:
Phys. Rev. A; (United States)
Additional Journal Information:
Journal Volume: 32:3
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 74 ATOMIC AND MOLECULAR PHYSICS; ATOMS; OPTICAL PUMPING; SPECTROSCOPY; TRANSIENTS; BLOCH THEORY; ENERGY LEVELS; PROBES; RESONANCE; STARK EFFECT; PUMPING; 420300* - Engineering- Lasers- (-1989); 640304 - Atomic, Molecular & Chemical Physics- Collision Phenomena

Citation Formats

de Garcia, A G, Meystre, P, and Salomaa, R R.E. Time-delayed probe spectroscopy in two-photon--pumped systems. United States: N. p., 1985. Web. doi:10.1103/PhysRevA.32.1531.
de Garcia, A G, Meystre, P, & Salomaa, R R.E. Time-delayed probe spectroscopy in two-photon--pumped systems. United States. https://doi.org/10.1103/PhysRevA.32.1531
de Garcia, A G, Meystre, P, and Salomaa, R R.E. Sun . "Time-delayed probe spectroscopy in two-photon--pumped systems". United States. https://doi.org/10.1103/PhysRevA.32.1531.
@article{osti_5310598,
title = {Time-delayed probe spectroscopy in two-photon--pumped systems},
author = {de Garcia, A G and Meystre, P and Salomaa, R R.E.},
abstractNote = {We study transients in resonantly coupled three-level systems. Two of the levels are coupled by intense two-photon pumping, and the third one provides a probing level. Adiabatically eliminated levels appear in effective system parameters. Experimentally, this model is applicable, e.g., in resonantly enhanced parametric and harmonic generation in atomic vapors. A distinguishing feature in the system is the appearance of ac Stark shifts in the probe spectra when pumping at the two-photon resonance. The nutation signal is shown to give information on the effective two-photon Rabi frequency and on the decay rate of the dipole-forbidden two-photon coherence. Free-induction decay is strongly dominated by population-induced effects; Raman-like peaks introduced by Stark shifts may show large instantaneous gain. Gaussian pump pulses are investigated to investigate effects arising from the temporal sweeping of the two-photon Rabi flipping and the modulation of the Stark shifts. The results also provide relevant information on the gain dynamics of coherently pumped lasers.},
doi = {10.1103/PhysRevA.32.1531},
url = {https://www.osti.gov/biblio/5310598}, journal = {Phys. Rev. A; (United States)},
number = ,
volume = 32:3,
place = {United States},
year = {1985},
month = {9}
}