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Lasers in flame

Probing temperature and radical species in a flame using 4-wave mixing spectroscopy.

Professor Paul Ewart

Emeritus Professor

Sub department

  • Atomic and Laser Physics
paul.ewart@physics.ox.ac.uk
  • About
  • Publications

Spectral line shape of nonresonant four-wave mixing in Markovian stochastic fields

PHYSICAL REVIEW A 56:3 (1997) 2267-2279

Authors:

R Bratfalean, P Ewart
More details from the publisher

Time-delayed four-wave mixing: The interplay between laser field fluctuations and the atomic memory time

Technical Digest - European Quantum Electronics Conference (1996) 206

Authors:

JV Gomes, M Belsley, M Kaczmarek, P Ewart

Abstract:

The phase conjugate signals generated by a fluctuating radiation field via a four-wave mixing process in an atomic vapor undergoing dephasing collisions is theoretically examined. The incident radiation field is considered well detuned from the atomic resonance and modelled as a two mode laser field whose amplitudes follow jointly circular Gaussian statistics, while the dephasing collisions are treated as a Markovian process. A fully analytical expression of the phase conjugate signal is obtained which contains contributions from several possible time-ordered pathways. The relative strengths of the various contributing time-ordered pathways can be manipulated by varying the amount of decoherence introduced by dephasing collisions.

High power single mode radiation by narrowband amplification of a diode laser

OPTICS COMMUNICATIONS 123:1-3 (1996) 139-142

Authors:

MJ New, P Ewart
More details from the publisher

Spectral line shape of resonant four-wave mixing induced by broad-bandwidth lasers

PHYSICAL REVIEW A 54:3 (1996) 2347-2355

Authors:

PGR Smith, P Ewart
More details from the publisher
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The dependence of broadband four-wave mixing signal intensity on the length of the interaction region

JOURNAL OF MODERN OPTICS 43:12 (1996) 2523-2531

Authors:

R Bratfalean, P Ewart
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