skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: N+CPT clock resonance

Abstract

In a typical compact atomic time standard a current modulated semiconductor laser is used to create the optical fields that interrogate the atomic hyperfine transition. A pair of optical sidebands created by modulating the diode laser become the coherent population trapping (CPT) fields. At the same time, other pairs of optical sidebands may contribute to other multiphoton resonances, such as three-photon N-resonance [Phys. Rev. A 65, 043817 (2002)]. We analyze the resulting joint CPT and N-resonance (hereafter N+CPT) analytically and numerically. Analytically we solve a four-level quantum optics model for this joint resonance and perturbatively include the leading ac Stark effects from the five largest optical fields in the laser's modulation comb. Numerically we use a truncated Floquet solving routine that first symbolically develops the optical Bloch equations to a prescribed order of perturbation theory before evaluating. This numerical approach has, as input, the complete physical details of the first two excited-state manifolds of {sup 87}Rb. We test these theoretical approaches with experiments by characterizing the optimal clock operating regimes.

Authors:
 [1];  [2]
  1. Department of Physics and Astronomy, Youngstown State University, Youngstown, Ohio 44555 (United States)
  2. MS-59, Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, Massachusetts 02138 (United States)
Publication Date:
OSTI Identifier:
21175786
Resource Type:
Journal Article
Journal Name:
Journal of the Optical Society of America. Part B, Optical Physics
Additional Journal Information:
Journal Volume: 25; Journal Issue: 12; Other Information: DOI: 10.1364/JOSAB.25.002130; (c) 2008 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0740-3224
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ATOMIC CLOCKS; BLOCH EQUATIONS; EXCITED STATES; MODULATION; MULTI-PHOTON PROCESSES; PERTURBATION THEORY; RESONANCE; RUBIDIUM 87; SEMICONDUCTOR LASERS; STARK EFFECT

Citation Formats

Crescimanno, M, and Hohensee, M. N+CPT clock resonance. United States: N. p., 2008. Web. doi:10.1364/JOSAB.25.002130.
Crescimanno, M, & Hohensee, M. N+CPT clock resonance. United States. https://doi.org/10.1364/JOSAB.25.002130
Crescimanno, M, and Hohensee, M. 2008. "N+CPT clock resonance". United States. https://doi.org/10.1364/JOSAB.25.002130.
@article{osti_21175786,
title = {N+CPT clock resonance},
author = {Crescimanno, M and Hohensee, M},
abstractNote = {In a typical compact atomic time standard a current modulated semiconductor laser is used to create the optical fields that interrogate the atomic hyperfine transition. A pair of optical sidebands created by modulating the diode laser become the coherent population trapping (CPT) fields. At the same time, other pairs of optical sidebands may contribute to other multiphoton resonances, such as three-photon N-resonance [Phys. Rev. A 65, 043817 (2002)]. We analyze the resulting joint CPT and N-resonance (hereafter N+CPT) analytically and numerically. Analytically we solve a four-level quantum optics model for this joint resonance and perturbatively include the leading ac Stark effects from the five largest optical fields in the laser's modulation comb. Numerically we use a truncated Floquet solving routine that first symbolically develops the optical Bloch equations to a prescribed order of perturbation theory before evaluating. This numerical approach has, as input, the complete physical details of the first two excited-state manifolds of {sup 87}Rb. We test these theoretical approaches with experiments by characterizing the optimal clock operating regimes.},
doi = {10.1364/JOSAB.25.002130},
url = {https://www.osti.gov/biblio/21175786}, journal = {Journal of the Optical Society of America. Part B, Optical Physics},
issn = {0740-3224},
number = 12,
volume = 25,
place = {United States},
year = {Mon Dec 15 00:00:00 EST 2008},
month = {Mon Dec 15 00:00:00 EST 2008}
}