Memory correlation effects on quantum noise in lasers and masers. Academic Article uri icon


  • We demonstrate how spontaneous-emission noise in lasers and masers can be reduced through memory effects of the lasing atoms. We show that for short measurement times the spontaneous-emission noise can be smaller than the usual Schawlow-Townes limit. We discuss a general model for atomic memory effects and derive expressions for the noise correlation function, phase diffusion, and the emitted spectrum. Furthermore, we allow for a frequency distribution over the lasing atoms and hence account for Doppler broadening or a selective excitation of the atoms. 1990 The American Physical Society.

published proceedings

  • Phys Rev A

author list (cited authors)

  • Benkert, C., Scully, M. O., & Sssmann, G.

citation count

  • 22

complete list of authors

  • Benkert, C||Scully, MO||Süssmann, G

publication date

  • June 1990