The time evolution of atomic occupancy in the system of twomode field interacting with two coupling atoms in Kerr medium is studied by means of quantum theory.

The self focusing effect of quasi double ring modulated laser beam propagating in the Kerr medium CS 2 has been observed in the experiment.

The squeezing property of the light in the system of two-mode squeezing vacuum field interacting with two coupling atoms in Kerr medium is studied by means of quantum theory.

Beam-splitting effect of circle spot laser beam in kerr-medium;

Experimental and Theoretical Study of Self-focusing and Spot-splitting of the Double-circle Spot Laser Beam in Kerr-medium;

Self-Focusing Effect of Circle Spot Laser Beam in Kerr-medium;

Supercontinuum generation and self-focusing in Kerr media;

Propagation stability of non-paraxial beam in nonlinear Kerr media is investiga ted by using the linear stability method.

e study the phase properties of squeezed number states in the Kerr media by using the PeggBarnett theory.

By measuring the cooling curve and quench severity of quenching oil at various flow rates,the relationship among the hardening capacity,quench severity and flow rate was established.

In order to investigate the heat transfer coefficient of quenching oil at different flow rates under practical condition, the doppler flowmeter was adopted to measure the flow rates in given quench tank.

In order to investigate the cooling characteristics and heat transfer coefficient of quenching oil at different flow rates under practical condition, the Doppler flowmeter had been adopted to measure the flow rates in given quench tank.

Satisfactory one-step ray depth migration can be achieved by calculat ing variable ray velocity with the use of“medium velocity”in depth domain,and re- placing traditional hyperbolic diffraction curve with actual diffraction curve.