Noise reduction, lasing without inversion, and pump statistics in coherently prepared lambda quantum-beat media. Academic Article uri icon


  • Amplitude-noise reduction and diminished losses are found in a laser system in which the lower level of the usual two-level atom is replaced by a coherently prepared doublet, i.e., a quantum-beat configuration. The role of atomic coherence between the various levels and regular pumping is investigated. When a portion of the output signal is reflected from a phase-conjugate mirror and reinjected into the laser, the locking phase can be altered and a large phase-noise reduction can be obtained. 1992 The American Physical Society.

published proceedings

  • Phys Rev A

author list (cited authors)

  • Orszag, M., Zhu, S. Y., Bergou, J., & Scully, M. O.

citation count

  • 8

complete list of authors

  • Orszag, M||Zhu, SY||Bergou, J||Scully, MO

publication date

  • April 1992