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Title: Coherent population trapping with polarization modulation

Abstract

Coherent population trapping (CPT) is extensively studied for future vapor cell clocks of high frequency stability. In the constructive polarization modulation CPT scheme, a bichromatic laser field with polarization and phase synchronously modulated is applied on an atomic medium. A high contrast CPT signal is observed in this so-called double-modulation configuration, due to the fact that the atomic population does not leak to the extreme Zeeman states, and that the two CPT dark states, which are produced successively by the alternate polarizations, add constructively. Here, we experimentally investigate CPT signal dynamics first in the usual configuration, a single circular polarization. The double-modulation scheme is then addressed in both cases: one pulse Rabi interaction and two pulses Ramsey interaction. The impact and the optimization of the experimental parameters involved in the time sequence are reviewed. We show that a simple seven-level model explains the experimental observations. The double-modulation scheme yields a high contrast similar to the one of other high contrast configurations like push-pull optical pumping or crossed linear polarization scheme, with a setup allowing a higher compactness. The constructive polarization modulation is attractive for atomic clock, atomic magnetometer, and high precision spectroscopy applications.

Authors:
; ;  [1]
  1. LNE-SYRTE, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, 61 avenue de l'Observatoire, 75014 Paris (France)
Publication Date:
OSTI Identifier:
22596669
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 119; Journal Issue: 24; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ATOMIC CLOCKS; CONFIGURATION; LASER RADIATION; LASERS; MAGNETOMETERS; MODULATION; OPTICAL PUMPING; OPTIMIZATION; POLARIZATION; PULSES; SIGNALS; TRAPPING; VAPORS; ZEEMAN EFFECT

Citation Formats

Yun, Peter, E-mail: enxue.yun@obspm.fr, Guérandel, Stéphane, and Clercq, Emeric de. Coherent population trapping with polarization modulation. United States: N. p., 2016. Web. doi:10.1063/1.4954690.
Yun, Peter, E-mail: enxue.yun@obspm.fr, Guérandel, Stéphane, & Clercq, Emeric de. Coherent population trapping with polarization modulation. United States. doi:10.1063/1.4954690.
Yun, Peter, E-mail: enxue.yun@obspm.fr, Guérandel, Stéphane, and Clercq, Emeric de. Tue . "Coherent population trapping with polarization modulation". United States. doi:10.1063/1.4954690.
@article{osti_22596669,
title = {Coherent population trapping with polarization modulation},
author = {Yun, Peter, E-mail: enxue.yun@obspm.fr and Guérandel, Stéphane and Clercq, Emeric de},
abstractNote = {Coherent population trapping (CPT) is extensively studied for future vapor cell clocks of high frequency stability. In the constructive polarization modulation CPT scheme, a bichromatic laser field with polarization and phase synchronously modulated is applied on an atomic medium. A high contrast CPT signal is observed in this so-called double-modulation configuration, due to the fact that the atomic population does not leak to the extreme Zeeman states, and that the two CPT dark states, which are produced successively by the alternate polarizations, add constructively. Here, we experimentally investigate CPT signal dynamics first in the usual configuration, a single circular polarization. The double-modulation scheme is then addressed in both cases: one pulse Rabi interaction and two pulses Ramsey interaction. The impact and the optimization of the experimental parameters involved in the time sequence are reviewed. We show that a simple seven-level model explains the experimental observations. The double-modulation scheme yields a high contrast similar to the one of other high contrast configurations like push-pull optical pumping or crossed linear polarization scheme, with a setup allowing a higher compactness. The constructive polarization modulation is attractive for atomic clock, atomic magnetometer, and high precision spectroscopy applications.},
doi = {10.1063/1.4954690},
journal = {Journal of Applied Physics},
number = 24,
volume = 119,
place = {United States},
year = {Tue Jun 28 00:00:00 EDT 2016},
month = {Tue Jun 28 00:00:00 EDT 2016}
}