FORCES ON A THREE-LEVEL ATOM INDUCED BY TWO LASER BEAMS

2006 ◽  
Vol 20 (32) ◽  
pp. 5473-5482
Author(s):  
V. V. PARANJAPE ◽  
P. V. PANAT
Keyword(s):  
Master Equation ◽  
Laser Beams ◽  
Optical Forces ◽  
Present Formulation ◽  
Coherent Light ◽  
Level Atom ◽  
Light Beams ◽  
Analytical Expressions

We present formulation of optical forces acting on a three-level atom coupled to two coherent light beams. Analytical expressions for the force are obtained by using the master equation. All three configurations: Raman, V-shaped and cascade are used for the analysis. The dipolar force is obtained numerically as a function of detuning.

EFFECT OF PHASE FLUCTUATIONS OF LASER ON OPTICAL FORCES IN A TWO-LEVEL ATOM

2000 ◽  
Vol 14 (17n18) ◽  
pp. 631-637 ◽  
Author(s):  
S. V. LAWANDE ◽  
P. V. PANAT
Keyword(s):  
Angular Momentum ◽  
Steady State ◽  
Master Equation ◽  
Gaussian Beam ◽  
Laser Field ◽  
Density Operator ◽  
Bessel Beam ◽  
Optical Forces ◽  
Phase Fluctuations ◽  
Level Atom

An effect of phase fluctuations of a driving laser field on dissipative and dipolar forces of two-level atom is considered. The phase fluctuations are treated by a phase diffusion model where phase fluctuations follow Wiener–Levy process. An exact master equation for the relevant density operator is obtained and solved in the steady state. Optical forces are calculated. The effect of phase fluctuations on angular momentum imparted by a Laguerre–Gaussian beam and an ideal Bessel beam to the atom is investigated.

Observation of optical activity in Brillouin scattering experiments

1969 ◽  
Vol 47 (23) ◽  
pp. 2719-2725 ◽  
Author(s):  
M. S. Kharusi ◽  
G. W. Farnell
Keyword(s):  
Optical Activity ◽  
Brillouin Scattering ◽  
Beam Width ◽  
Acoustic Propagation ◽  
Acoustic Beam ◽  
Optical Wave ◽  
Acoustic Frequency ◽  
Diffraction Geometry ◽  
Light Beams ◽  
Analytical Expressions

Analytical expressions have been developed for calculating the diffraction geometry for Brillouin scattering experiments in which the applied acoustic beam and the optical wave vectors lie in a plane containing the optic axis of uniaxial crystals. A computer program solves for the diffraction angles for the general cases where the choice of crystal, crystal face, direction of acoustic propagation, plane of optical incidence, and amount of optical activity are all arbitrary. It is shown that for acoustic propagation along the X axis in quartz, the optical activity produces easily detectable changes in the angles of the incident and diffracted light beams in the XZ plane when polarization change occurs on diffraction. Moreover for this case, the optical activity produces a cutoff acoustic frequency below which Brouillin scattering with polarization rotation does not occur. Experimental measurements verify the predicted angular changes to within the accuracy permitted by the finite acoustic beam width.

X.—Remarks on Coincidence Experiments with Visible Light

1962 ◽  
Vol 66 (2) ◽  
pp. 111-115
Author(s):  
Z. Bay ◽  
P. S. Farago
Keyword(s):  
Quantum Theory ◽  
Visible Light ◽  
The Other ◽  
Coherent Light ◽  
Quadratic Effect ◽  
Linear Effect ◽  
Negative Results ◽  
Light Beams

SynopsisAfter the detection of correlations in two coherent light beams by Hanbury Brown and Twiss, objections were raised by Brannen and Ferguson on the basis of the experiments of Adam, Janossy and Varga and their own experiments in which no correlations were detected. It is pointed out here that the different groups were looking for two entirely different effects, one being quadratic, the other one linear in the number of photons involved; the quadratic effect (discovered by Hanbury Brown and Twiss) is in agreement with quantum theory while the linear effect is not. It was shown by Purcell and by Hanbury Brown and Twiss that the choice of parameters in the experiments which gave negative results was inadequate to show the quadratic effect. It is shown in this paper that their experiments were also inadequate to decide between the existence or nonexistence of the linear effect.

Optoelectronic system of prompting and stabilizing coherent light beams in a given point of an eye

1996 ◽  
Author(s):  
Yuri G. Danik ◽  
Vladimir I. Karpenko ◽  
Svyatoslav N. Fyodorov ◽  
Vladimir I. Turin ◽  
Olga E. Zaslavskaya ◽  
...  
Keyword(s):  
Coherent Light ◽  
Optoelectronic System ◽  
Light Beams

scholarly journals Calculation of optical forces for arbitrary light beams using the Fourier ray method

2019 ◽  
Vol 27 (20) ◽  
pp. 27459
Author(s):  
Meng Shao ◽  
Shuhe Zhang ◽  
Jinhua Zhou ◽  
Yu-Xuan Ren
Keyword(s):  
Optical Forces ◽  
Ray Method ◽  
Light Beams

scholarly journals Regime of small number of photons in the cavity for a singleemitter laser

2021 ◽  
Vol 2103 (1) ◽  
pp. 012158
Author(s):  
N V Larionov
Keyword(s):  
Differential Equation ◽  
Exact Solutions ◽  
Master Equation ◽  
Cavity Mode ◽  
Photon Number ◽  
System Of Equations ◽  
Equation Approach ◽  
Master Equation Approach ◽  
Single Emitter ◽  
Analytical Expressions

Abstract The model of a single-emitter laser generating in the regime of small number of photons in the cavity mode is theoretically investigated. Based on a system of equations for different moments of the field operators the analytical expressions for mean photon number and photon number variance are obtained. Using the master equation approach the differential equation for the phase-averaged quasi-probability Q is derived. For some limiting cases the exact solutions of this equation are found.

scholarly journals Quantum analysis of sub harmonic generation with two-mode coherent light

2021 ◽  
Vol 4 (1) ◽  
pp. 026-030
Author(s):  
Getahun Alemayehu ◽  
Dagnew Habtamu
Keyword(s):  
Master Equation ◽  
Harmonic Generation ◽  
Langevin Equation ◽  
Photon Number ◽  
Photon Statistics ◽  
Coherent Light ◽  
Quantum Analysis ◽  
Quadrature Squeezing ◽  
Mean And Variance ◽  
Quadrature Variance

In this work the statistical and squeezing properties of light-driven by sub-harmonic generation with two-mode coherent light are studied. With interaction Hamiltonian of both two-mode coherent and sub harmonic generation, we have driven master equation of system under consideration. From the master equation, the solution of the C-number Langevin equation is derived. It helps us to solve quadrature variance, quadrature squeezing, mean, and variance of photon number for light produced by sub-harmonic generation with the two-mode coherent light state. And the result shows that; the squeezing occurs in plus quadrature with the maximum squeezing of 87%. The photon statistics of the system under consideration is subpoissonian in which both mean & variance are increasing as kappa increase.

All-optical switch and transistor based on coherent light-controlled single two-level atom coupling with two nanowires

2019 ◽  
Vol 28 (11) ◽  
pp. 114207 ◽  
Author(s):  
Xin-Qin Zhang ◽  
Xiu-Wen Xia ◽  
Jing-Ping Xu ◽  
Mu-Tian Cheng ◽  
Ya-Ping Yang
Keyword(s):  
Optical Switch ◽  
Coherent Light ◽  
Level Atom ◽  
All Optical ◽  
All Optical Switch

scholarly journals Optical Connecting of Fibers by Laser Beams Propagating from the Fibers Edges

2008 ◽  
Vol 2008 ◽  
pp. 1-6 ◽  
Author(s):  
Sergey Nikolayevich Mensov ◽  
Yuri Victorovich Polushtaytsev
Keyword(s):  
Nonlinear Interaction ◽  
High Efficiency ◽  
Laser Beams ◽  
Light Beams

A possibility to connect nonprecise positioned fibers in photopolymerizable compositions is under discussion in this paper. The processes of optical synthesis of connective waveguiding structures forming in such mediums directly by the radiation leaving the edges of connecting fibers are investigated numerically and experimentally as well. It was shown that nonlinear interaction of the light beams allows to connect misaligned and transversally shifted fibers with high efficiency.

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