Lasers with nonlocal feedback, diffraction, and diffusion

F. Papoff, R. Zambrini

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

An off-axis feedback loop originates a two-point nonlocality that changes the instabilities of lasers of classes A and B: after crossing a first threshold these devices amplify while they lase above a second one. We obtain the instability diagram in presence of off-axis feedback and show that transverse phase and group velocities can be tuned to have the same or opposite sign, depending on control parameters. Counterpropagating noise sustained patterns and localized perturbations are found for an out-of-phase feedback when the laser operates as a signal splitter. We predict these effects in a broad class of devices, with either positive or negative refractive index, diffusion, and in presence of noise.
LanguageEnglish
JournalPhysical Review A
Volume79
Issue number3
DOIs
Publication statusPublished - 9 Mar 2009

Fingerprint

diffraction
lasers
phase velocity
group velocity
diagrams
refractivity
perturbation
thresholds

Keywords

  • laser beams
  • laser feedback
  • laser noise
  • laser stability
  • light diffraction
  • light scattering
  • optical beam splitters
  • refractive index

Cite this

@article{8e7658b4542f478e8f17fc2e50af9bfd,
title = "Lasers with nonlocal feedback, diffraction, and diffusion",
abstract = "An off-axis feedback loop originates a two-point nonlocality that changes the instabilities of lasers of classes A and B: after crossing a first threshold these devices amplify while they lase above a second one. We obtain the instability diagram in presence of off-axis feedback and show that transverse phase and group velocities can be tuned to have the same or opposite sign, depending on control parameters. Counterpropagating noise sustained patterns and localized perturbations are found for an out-of-phase feedback when the laser operates as a signal splitter. We predict these effects in a broad class of devices, with either positive or negative refractive index, diffusion, and in presence of noise.",
keywords = "laser beams, laser feedback, laser noise, laser stability, light diffraction, light scattering, optical beam splitters, refractive index",
author = "F. Papoff and R. Zambrini",
year = "2009",
month = "3",
day = "9",
doi = "10.1103/PhysRevA.79.033811",
language = "English",
volume = "79",
journal = "Physical Review A - Atomic, Molecular, and Optical Physics",
issn = "1050-2947",
number = "3",

}

Lasers with nonlocal feedback, diffraction, and diffusion. / Papoff, F.; Zambrini, R.

In: Physical Review A, Vol. 79, No. 3, 09.03.2009.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Lasers with nonlocal feedback, diffraction, and diffusion

AU - Papoff, F.

AU - Zambrini, R.

PY - 2009/3/9

Y1 - 2009/3/9

N2 - An off-axis feedback loop originates a two-point nonlocality that changes the instabilities of lasers of classes A and B: after crossing a first threshold these devices amplify while they lase above a second one. We obtain the instability diagram in presence of off-axis feedback and show that transverse phase and group velocities can be tuned to have the same or opposite sign, depending on control parameters. Counterpropagating noise sustained patterns and localized perturbations are found for an out-of-phase feedback when the laser operates as a signal splitter. We predict these effects in a broad class of devices, with either positive or negative refractive index, diffusion, and in presence of noise.

AB - An off-axis feedback loop originates a two-point nonlocality that changes the instabilities of lasers of classes A and B: after crossing a first threshold these devices amplify while they lase above a second one. We obtain the instability diagram in presence of off-axis feedback and show that transverse phase and group velocities can be tuned to have the same or opposite sign, depending on control parameters. Counterpropagating noise sustained patterns and localized perturbations are found for an out-of-phase feedback when the laser operates as a signal splitter. We predict these effects in a broad class of devices, with either positive or negative refractive index, diffusion, and in presence of noise.

KW - laser beams

KW - laser feedback

KW - laser noise

KW - laser stability

KW - light diffraction

KW - light scattering

KW - optical beam splitters

KW - refractive index

UR - http://dx.doi.org/10.1103/PhysRevA.79.033811

U2 - 10.1103/PhysRevA.79.033811

DO - 10.1103/PhysRevA.79.033811

M3 - Article

VL - 79

JO - Physical Review A - Atomic, Molecular, and Optical Physics

T2 - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

SN - 1050-2947

IS - 3

ER -