Tin radiation characteristics of plane channeling particles are described in terms of quantum mechanics. In the anharmonic approximation the spectrum distribution of the channeling radiation is calculated, comparison with the experiment shows a good agreement.

Under the condition of reasonable approximation, an approximate formula is given for the choice of optical axis position for a transverse flow CO2 laser resonator. The theory coincides well with the experimental results.

The intensity and the near and far-field patterns of an unstable confocal resonator of the transverse-fiow electrically excited CW CO2 laser have been studied theoretically and experimentally and their results are in good agreement.

This paper deals with the properties of narrow He-Ne discharge plasma in which the Avail condition is considered. Taking into consideration the wall sheath at various currents, the electron temperature, spatial density distribution and voltage-current characteristics are calculated. The calculation agrees with the experimental results.

The characteristics of a large volume XeCl excimer laser; including the improvement of uniformity of X-ray prcionization, and the unstable resonator laser output were investigated experimentally. The maximum pulse output energy is 1.6J.

The characteristics tunability of CO2 waveguide lasers have been analyzed theoretically and experimentally. It has been shown that the frequency tuning on one line can only be realized under given conditions. The tuning range is the function of the laser gain, total loss, gas pressure and gas mixture, as well as the discharge current.

An experimental study of C122 dye laser pumped by a 30Snm XeCl exeimer laser is presented. The tunable range of the dye laser is from 460.5 nm to 501.0 nm and hue width ~0.1 nm.

In a low-resolution detecting system, the high-resolution spectra of the atomic neon transitions of 2p3-4s1/1 and 2p7-4d3 have been observed indirectly by means of laser-excited atomic fluorescence spectrometry for the first time. It further confirms that the neon line at 5919.037 is identified to the transition of 2p7-4d3.

In the paper we describe the measured laser intensity temporal spectrum of the beam and its s-polarization and p-polarization compounds at 6328 from mW level intracavity He-Ne lasers. For explanation a simple quantitative analysis is presented based on the experimental results.

The development of double Pookols cells with an aperture of 11x12mm2 is described and the performances measured. It has been used to select single short laser pulses from a mode-locked TEA CO2 laser. The rise time of a laser pulse switched-out from the smooth long pulse of a single longitudinal mode hybrid TEA CO2 laser is less thau 1 ns.

This paper presents the experimental results on. measuring the discharge voltage of an cxcimcr laser using a voltage divider. Also discussed are various factors impairing the performance of the measurement equipment and the ways for limination of over-voltage breakdown and the variation law.

Local temperature of solid surface can be obtained by the intonsity ratio between Stokes Bumnn scattering and anti-Stokcs Banian scattering from samples. It is a real time temperature measurement without touching the object. It needs no calibration, but derives from spectroscopic measurement. It meets the requirements of surface physics and new technology development of VLSI. A steady state measurement using a low power laser has been achieved. The analysis and correction of its errors are given.

This paper describes how to choose reasonably the range of quality factor Q in L-C constant charge. An example is given which further proves that it is unreasonable to choose high Q.

The operation canditiont and the threshold temperature for a CW molecular nitrogen laser are analysed and discussed.

A sealed-off tunable CW C18O2 laser is reported. 105 laser lines were obtained and the strongest line output was 41.3 W.

The possibility for a two-channel N2 laser by "capacitor transfer" circuit is presented and the experimental demonstration has been made.

A pulsed tunable HF/DF laser operating at a single wavelength is reported and the spectral output characteristics are studied.

In KrCl laser oscillator-amplifier system pumped by U V preionization discharge, KrCl laser pulse duration has been broadened with a factor of 2 by amplifying the signal bouncing back and forth in the amplifier.

Using a CO laser, we have observed the characteristics of the optogalvanic infrared spectrum from Ar. The possible identification of the spectrum is also given.

The frequency stabilization of dye laser is described. The laser frequency is stabilized to the side of a transmision curve of an optical cavity by means of the usual differential servo technique. With a PZT cavity mirror driven by fast servo electronics and a galvoplate driven by slow servo electronics, the linewidth of the jet stream dye laser is reduced to 1 MHz. Experimental result is presented on the measurement of saturation spectroseopy of sodium D1 line.