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  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1989),
  • paper TUA1

Observation of retromodulation/conjugation using a self-pumped atomic sodium PCM

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Abstract

We report on the observation of retromodulation/conjugation using a self-pumped conjugator employing atomic sodium as the nonlinear medí- um. Previous observations of retromodulation/ conjugation employed a crystal of BaTiO3 as the nonlinear medium.1 Although the latter approach is simple in its configuration and high temporal data rates are possible, photorefractive materials possess a relatively limited response time to spatial changes of the incoming wavefront. In the present set of experiments, we demonstrated a retromodulator which potentially has several desirable features Including (1) high spatial bandwidth, (2) fast response time to wavefront changes (projected gigahertz bandwidth), (3) high temporal data rates possible (projected gigahertz bandwidth), (4) low threshold powers required (50 mW demonstated), and (5) rapid buildup time. These features indicate that such classes of retromodulators may be useful in low power level free space and guided-wave communication links as well as in novel optical resonators and gyroscopes.

© 1989 Optical Society of America

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