Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Acta Physica Sinica

SECOND-ORDER QUANTUM COHERENCE AND IT'S TIME-SPECTRUM CHARACTERISTICS IN THE FIELD OF A TWO-MODE LASER

Yin J, Y Wang

Published Jan 1, 1995• 0 citations
OpenAlex

Abstract

According to the quantum theory of coherence, we have derived the degree of second-order coherence, g(2) (τ), and the formula of it's time-spectrum in a two-mode laser, and given the results under three specific cases. The second-order coherence and it's time-spectrum characteristics of a two-mode laser isanalysed, the periodicity and the photon anticorrelation effect of g(2)(τ) are indicated, and the possible application of the time-spectrum characteristics of g(2)(τ) in a two-mode He-Ne laser is discussed.

Related papers

TIME CHARACTERISTICS OF PHASE FLUCTUATION AND COHERENCE OF A COHERENT FIELD INTERACTING WITH AN ATOM

Fan A, Z Wang, Nian X. Sun

Based on the phase formalism of Pegg-Barnett and the quantum theory of opti. cal coherence of Glauber, the time characteristics of quantum phase fluctuation, quantum coherence and photon-number distribution of a coherent field interacting with a two-level atom in a ideal cavity are studied using dressed-atom states. The calculated results show that, in the case of resonant interaction of the atom and field, the atom acts as non-linear filter; quantum phase property and coherence of the field are also complementary in the way of description on optical incoherence.

Acta Physica Sinica•Jan 1, 1995•0 citations

Time-spectrum characteristics of the degree of second-order coherence of a two-mode laser field and its possible applications in frequency and amplitude stabilization

Jianping Yin, Shiqun Zhu, Weijian Gao +2 more

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Oct 28, 1992•0 citations

Second-order coherence and the Hanbury Brown–Twiss experiment

Masud Mansuripur

Introduction The degree of first-order temporal coherence, a function denoted by g (1) ( τ ), provides information about the coherence length and the power spectral density of a light source. However, without additional information, g (1) ( τ ) has no bearing on intensity fluctuations and higher-order statistics of the emitted light. A quasi-monochromatic laser beam and the beam of light from an incandescent light bulb, provided that the latter is properly filtered to match the spectral line-shape of the former, will have identical degrees of first-order coherence. Any interferometric experiment involving the splitting and superposition of amplitudes would yield identical results for the laser beam and the (properly filtered) thermal light. Therefore, on the basis of such experiments alone, there is no way to distinguish the two light sources. It turns out, however, that the intensity fluctuations of laser light are fundamentally different from those of thermal light. The two sources can, therefore, be distinguished based on their second-order coherence properties. An ideal photodetector produces an electrical signal proportional to the “cycle-averaged intensity” of the E -field (or B -field) of the light beam at the location of the detector. Assuming that the electrical bandwidth of the detector (including all associated circuitry) is greater than the bandwidth of the incident light wave by at least a factor of 2, the output of the detector should accurately represent the intensity fluctuations of the light beam as a function of time.

Cambridge University Press eBooks•Feb 26, 2009•0 citations

Second-order coherence g (2) (τ) and its frequency-dependent characteristics of a two-longitudinal-mode laser

Jianping Yin, Shiqun Zhu, Weijian Gao +1 more

Applied Physics B•Dec 1, 1996•1 citation

Coherence and Statistical Properties of a Two-Mode Laser Beam

M. Bertolotti, B. Crosignani, Paolo Di Porto +1 more

The first- and second-order correlation functions for the field obtained by the superposition of two laser modes through a Young's experiment are discussed both experimentally and theoretically. An electronic method we have developed for measuring certain values of the second-order correlation is contrasted with the method based on photon counting. It is shown that, in some cases, interference experiments may have advantages over the photocounting technique.

Physical Review•Oct 28, 1966•8 citations

The quantum dynamics of two-mode SU(1,1) coherent state interacting with a four-level atom

Xie Fang-sen

The state function of the two-mode SU(1,1) coherent states field interacting with a four-level atom is derived by means of quantum theory.It is studied that the two-mode intensity correlation function,the Cauchy-Schwartz inequality and the second-order coherence properties for each mode of the light field in the system of the two-mode SU(1,1) coherent states field interacting with four-level atom.It is discussed that the influence of the coupling coefficient between the light field and atom and the initial intensity of the light field on file quantum dynamics of the light field.The results of the studies indicate that the statistic properties of the photon depend on the initial state of the system,the correlation of the two-mode of light is both positive and non-classical,the photon anti-bunching of the first mode appear at all time,and the photon bunching and anti-bunching of the second mode appear alternately.

Jiguang zazhi•Jan 1, 2009•0 citations
According to the quantum theory of coherence, we have derived the degree of second-order coherence, g(2) (τ), and the formula of it's time-spectrum in a two-mode laser, and given the results under three specific cases. The second-order coherence and it's time-spectrum characteristics of a two-mode laser isanalysed, the periodicity and the photon anticorrelation effect of g(2)(τ) are indicated, and the possible application of the time-spectrum characteristics of g(2)(τ) in a two-mode He-Ne laser is discussed.
Based on the phase formalism of Pegg-Barnett and the quantum theory of opti. cal coherence of Glauber, the time characteristics of quantum phase fluctuation, quantum coherence and photon-number distribution of a coherent field interacting with a two-level atom in a ideal cavity are studied using dressed-atom states. The calculated results show that, in the case of resonant interaction of the atom and field, the atom acts as non-linear filter; quantum phase property and coherence of the field are also complementary in the way of description on optical incoherence.
Introduction The degree of first-order temporal coherence, a function denoted by g (1) ( τ ), provides information about the coherence length and the power spectral density of a light source. However, without additional information, g (1) ( τ ) has no bearing on intensity fluctuations and higher-order statistics of the emitted light. A quasi-monochromatic laser beam and the beam of light from an incandescent light bulb, provided that the latter is properly filtered to match the spectral line-shape of the former, will have identical degrees of first-order coherence. Any interferometric experiment involving the splitting and superposition of amplitudes would yield identical results for the laser beam and the (properly filtered) thermal light. Therefore, on the basis of such experiments alone, there is no way to distinguish the two light sources. It turns out, however, that the intensity fluctuations of laser light are fundamentally different from those of thermal light. The two sources can, therefore, be distinguished based on their second-order coherence properties. An ideal photodetector produces an electrical signal proportional to the “cycle-averaged intensity” of the E -field (or B -field) of the light beam at the location of the detector. Assuming that the electrical bandwidth of the detector (including all associated circuitry) is greater than the bandwidth of the incident light wave by at least a factor of 2, the output of the detector should accurately represent the intensity fluctuations of the light beam as a function of time.
The state function of the two-mode SU(1,1) coherent states field interacting with a four-level atom is derived by means of quantum theory.It is studied that the two-mode intensity correlation function,the Cauchy-Schwartz inequality and the second-order coherence properties for each mode of the light field in the system of the two-mode SU(1,1) coherent states field interacting with four-level atom.It is discussed that the influence of the coupling coefficient between the light field and atom and the initial intensity of the light field on file quantum dynamics of the light field.The results of the studies indicate that the statistic properties of the photon depend on the initial state of the system,the correlation of the two-mode of light is both positive and non-classical,the photon anti-bunching of the first mode appear at all time,and the photon bunching and anti-bunching of the second mode appear alternately.