The article has proved preliminarily connection of dipole moments and frequency doubling effects of organic conjugate molecules. The molecular dipole moments of 3-methyl and 2-tmethyl-4-nitropyridine-l-oxide (3-POM and 2-POM) and 2-halogea and 3-halogen-4-nitroniline (2-CNA, 3-CNA, 2-BNA and 3r-BNA) have been calculated by using EHMO method, and synthesized, their frequency doubling properties and dipole moments have been measured. The experimental results are in agreement with the theoretical production.

The method of dressed atoms is used to obtain the Babi solution for atoms subjected to a laser field. The result agrees with that obtained from the Bloch equation.

Infrared absorption spectrum of phosphate glasses was measured and absorption peaks at 3.5pm, 4.25pm, 6.0pm were obtained. Further studies on the influence of A1S03 content and alkali oxide content in phosphate laser glasses on the absorption band have been mode. It is shown that the density and strength of phosphate laser decrease with the increasing water content.

CW Ar+ laser is used for recrystallization of polysilicon films on isolating layers. Experimental results show a large increase in grain size, significant improvement in electrical properties and compatibility with conventional integrated circuit technology.

In this paper the optical random vibrator and its basic characteristics are introduced. Also described is the principle of this method for reducing the coherent optical background noise in the coherent imaging system. Better experimental results are given of suppressing the coherent background noise by means of the optical random vibractor.

This paper analyses how the exciting efficiency is influenced by errors in the regulation of cylindrical step-index optical waveguide fiber with a spherical lens excited with GaAs lasers. It shows that the influence of transversal offset is much more than that of axial regulation error, and the former causes the exciting efficiency of fundamental modes to decrease little faster than an exponential function does.

The laser diffuse reflectance at 694. 3nm on the pig and human skin was measured by a self-made reflectometer. The data were given for the experiment of laser damage threshold. The diffuse reflectances ratio at 530 nm, 632.8 mn, 694.3 and 1060nm at different places of human skin were obtained.

The paper reports the preliminary results of ultraviolet erythema on the skin irradiated with 308 nm excimer lasor light. Using white porkel as an animal model, we obtained the data on the injury thresholod of the skin. 95% fiducial limit of MBD50, in which energy will result in 50% perceptible redness occurence rate in all points irradiated at this exposure dose, ranges from 45.97 to 63.05 mJ/cm2.

The minimal visible lesion in the corneal epithelium resulted from exposure to C02 laser light has been carefully determined. The dose to cause 50% damage probability (ED50) varied with time of exposure: for 1.03 s was 5.72 W/cm2 (95% GL 5.8~5.85 W/cm2) and for 0.12 s was 10.7 W/cm2 (95% CL 10.4~10.9 W/cm2).

Analysis on the current explanations of the breakdown mechanism for a new type of He-Ne laser is given.

The experimental results on HgBrexcimer laser oscillation with corona preionization and transverse fast-discharge in Ne-N2-HgBr2 mixtures are reported.

A method to improve S/N ratio which has been used to measure the IK reflectivities of gold films is introduced.

The method and advantages of C02 laser therapy of anal fistula are described.