Third-order Correlation Function Research Articles

New technique for determination of the temporal characteristics of picosecond laser pulses

A new method based on the third-order correlation function of coherent Raman scattering has been suggested for the picosecond laser pulses. It has been shown theoretically and experimentally that when coherent Stokes and antistokes Raman scattering are measured at the same time, the temporal characteristics of two different ps laser pulses can be obtained simultaneously.

Effects of higher-order intensity correlations in photoelectron time-interval distributions

Series expansions of photoelectron time-interval distributions in terms of correlation and moment functions are used to investigate the effect of higher-order intensity correlations. Two cases are considered: light modulated by gaussian and by squared-gaussian noise. For gaussian modulated light fluctuations the use of correlation functions was preferred to the use of moment functions, because of better convergence of the series expansions. For light intensities modulated by squared-gaussian noise the series expansions may even diverge, depending on variance and correlation time of the light intensity fluctuations. In the domain of convergence first-, second- and third-order approximations are derived from the series expansions and it is shown that even at low mean photoelectron counting rate the third-order correlation function cannot be neglected. Theoretical expressions for the half-open time-interval distributions are experimentally verified. Light signals with the desired statistical character were obtained by modulation of the current of a light emitting diode with a gaussian or a squared-gaussian noise signal.

Third-order intensity correlations in laser light

Abstract The third-order intensity correlation function of a single-mode laser beam has been measured with high accuracy near the laser threshold by using a fast digital correlator. The results are in good agreement with recent theoretical computations.

Third-order intensity correlations in laser light

The third-order intensity correlation function of a single-mode laser beam has been measured with high accuracy near the laser threshold by using a fast digital correlator. The results are in good agreement with recent theoretical computations.

Higher-Order Correlation Properties of a Laser Beam

The intrinsic third-order intensity correlation function of a laser beam has been measured by a digital correlation technique, for a He: Ne laser operating near threshold. The results are compared with some recent calculations of Cantrell, Lax, and Smith and are found to be in good agreement.

Calculation of third-order intensity correlations in a laser near threshold

The third-order correlation function of the intensity fluctuation of a laser near threshold is calculated and compared with the experiments of Davidson and Mandel.