TY - JOUR

T1 - Quantum theory of laser soliton

AU - Golubeva, T. Yu.

AU - Golubev, Yu. M.

AU - Fedorov, S. V.

AU - Nesterov, L. A.

AU - Vashukevich, E. A.

AU - Rosanov, N. N.

PY - 2019/11/11

Y1 - 2019/11/11

N2 - The Heisenberg–Langevin equation for a spatial laser soliton in a wide-aperture laser with saturable absorption is constructed within the framework of consistent quantum electrodynamics. We discuss in detail the canonical variables for the generation field and the material two-level medium, consisting of centres providing amplification and absorption. It is assumed that laser generation evolves in time much more slowly than an atomic media. This assumption makes it possible to apply the adiabatic approximation and construct a closed equation for the amplitude of a laser field. Much attention is paid to the formulation of Langevin sources when deriving the equation since they play a decisive role in the formation of solitons' quantum statistical features. To provide an appropriate procedure for observing the quantum squeezing of a soliton, synchronization of laser generation by an external weak electromagnetic field is considered. Here we also present the results of the analysis of a classical laser soliton (neglecting the quantum fluctuations), which serves as the basis for further consideration of quantum effects.

AB - The Heisenberg–Langevin equation for a spatial laser soliton in a wide-aperture laser with saturable absorption is constructed within the framework of consistent quantum electrodynamics. We discuss in detail the canonical variables for the generation field and the material two-level medium, consisting of centres providing amplification and absorption. It is assumed that laser generation evolves in time much more slowly than an atomic media. This assumption makes it possible to apply the adiabatic approximation and construct a closed equation for the amplitude of a laser field. Much attention is paid to the formulation of Langevin sources when deriving the equation since they play a decisive role in the formation of solitons' quantum statistical features. To provide an appropriate procedure for observing the quantum squeezing of a soliton, synchronization of laser generation by an external weak electromagnetic field is considered. Here we also present the results of the analysis of a classical laser soliton (neglecting the quantum fluctuations), which serves as the basis for further consideration of quantum effects.

KW - dissipative optical solitons

KW - sub-Poissonian statistics

KW - laser with a saturable absorption

KW - Langevin sources

KW - quantum field statistics

UR - https://iopscience.iop.org/article/10.1088/1612-202X/ab5645

UR - https://iopscience.iop.org/article/10.1088/1612-202X/ab5645/pdf

M3 - Article

VL - 16

JO - Laser Physics Letters

JF - Laser Physics Letters

SN - 1612-2011

IS - 12

ER -