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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 2002),
  • paper QThG23

Propagation of Femtosecond Pulses in a Resonantly Absorbing Medium: Experimental Test of a New Definition of Group Velocity

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Abstract

According to the conventional expression (dω/dk), the group velocity of optical pulses in resonantly absorbing media can exceed the light velocity in the vacuum and even become negative.

© 2002 Optical Society of America

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