A new method for tracegases analysis-lasermass spectrometry is introduced in this paper. The principles and characteristics of themethod are described in detail, i.e., the coupling of resonance enhanced multiphotonionization (REMPI) with flight-of-time mass spectroscopy. Emphases are on twoapplications: detection and analysis of exhaust gases from vehicle engines and flue gasesfrom waste incinerators. Laser masspectrometry is an effective method for environmentalinspection, especially as an alternative method for toxic dioxin (PCDD/PCDF) analysis anddetection.

The experimental studyof the kinetic behavior of the three electronic-excited Herzberg states of O₂() in the earth's upperatmosphere provides important basis for the modeling of the upper atmosphere. In thispaper, we introduce the experiments, in which using the flowing afterglow and lasertechniques, they measured the rate constants of the collisional reactions of O₂(A³Σ_u⁺, c¹Σ_u^-) withatmospheric molecules. The great difference in the quenching rate constants between thehigh and low vibrational levels of O₂(A³??/font>_u⁺, c¹Σ_u^-) is alsodiscussed. We also present our views on this problem. In the end, we introduce theprospects of the experimental study of the kinetic behavior of the Herzberg states of O₂.

The absorption crosssection of the gases of SO2 and NO2 are measured under ambienttemperature within the wavelength range of 250～330 nm and 280～600 nm respectively. The optical resolution is better than0.1 nm. The results are applicable to traditional low-resolution system for remote sensingthe atmospheric pollution gases, and are also useful to DIAL.

An optically thingaseous mixture of Rb and low-density Ne is excited by 570～600 nm of the CW dye laser, The excited RbNe molecule isdissociated into the Rb(5P1/2/) or Rb(5P3/2/). The branching ratio isdefined as Ⅰ(D1/)/Ⅰ(D2/) where Ⅰ(D1/) and Ⅰ(D2/) are measuredintensities of the atomic Rb D1/ and D2/ lines. The branching isdetermined in the Ne density range 2 to 8 × 1017/cm-3/. The ratio ofthe dissociation rates and the fine structure changing cross section are obtained. Finestructrue changing cross section has also been measured for resonant excitation of the Rb52PJ state, the results are discussed.

This paper deduced thedensity of hydroxyl radical from ozone photolysis in the experiment of laser inducedfluorescence. The relation of density with atmospheric pressure and the fluorescenceintense of hydroxyl radical was also calculated and discussed. The conclusion iscoincidence with the result of other's experiment.

In this paper, a complexfrequency harmonic oscillator is quantized, the conception of even and odd coherent states(E-O CSs) is generalized to the complex frequency harmonic oscillator. and the quantumfluctuations of coordinate, momentum and energy are calculated. The results are discussed.It is show that the results of usual harmonic oscillator is the special case of thecomplex frequency harmonic oscillator.

The dynamic behaviour ofthe interaction between excited coherent states and Ⅴ-type quantum-beat three-level atoms are discussed. Thephoton antibunching effect and the squeezed state of the system light field are studied inthis paper.

In this paper, a theoryof measuring the output beam divergence of a giant pulse laserusing knife-edge method atthe focus of a lens was introduced, and the output beam divergenceangle of a Q-switchedintracavity frequency-doubling Cr:LiSAF laser was obtained.

In this paper, numericalsimulation for temperature field of Mo2/N films generated on molybdenum surfaceusing laser gas alloying(LGA) method is performed by finite-difference method. Thenumerical model used takes into account of Gauss distribution ‘ in space and time' of laser spot, the finite size ofsample, the temperature dependence of themophysical properties, and the surface heatlosses due to convection and radiation. The changes of temperature field are calculatedaccordingly. The feasibility of using pulse laser for laser surface transformationhardening and laser surface remelting is also analyzed.

The temperature oflaser-produced Al plasmas (LPP) have been measured at different laser energy by using themodel of local thermodynamic equilibrium (LTE). The electron temperature changed from14800 K to 20000 K when the laser energy increased from 30 mJ/pulse to 45 mJ/pulse, then ,the temperature had some decrease along the laser energy increasing. The intensities of AlⅠ spectra lines haveshown similar variant property, but differetnt from other Al ions spectra lines.Meanwhile, the transition probability of 447.99 nm line of Al Ⅲ was measured by the Boltzmann plots was about (9～10)× 108/ s-1/.

The method, which wasused to manufacture and test concave aspheric surface with large speed aperture usingcollimator in the past years,has many shortcomings,such as low making precision and longperiod etc. Now using compensatory ways, we can get more accurate surface in a relativeshort time. And its precision can get λ/10 ～λ/20(rms).Through practice for a long time, it has been fully provedthat this method is feasible.

The APV (AdaptivePhase/Doppler Velocimetry) system can be used to recognize the particle material andmeasure the particle size and velocity adaptively according to the Doppler frequency shiftand the Doppler phase shift theory. Through the light scattering theory of inconductivespherical particles, the layout of the APV system was studied, and the measurement methodof the flow field was discussed as well. The feasibility was proved with the simulatedexperiments.

The designing of anoverall test of CASCOM-1 satellite was introduced. The system can catch the transientstate error, and record the default dynamic process, and measure the satellite softwareetc.

The microcavityefficiently enhancement of organic electroluminescent devices was investigated, thedevices is consisted of the hole transporter ladder-type poly (p-phenylene) and theelectron transporter 8-hydroxyquinoline aluminum with dye pyrromethene-doping. Themicrocavity effect could be achieved by adjusting organic layer thickness between Al andITO electrode. The results obtained showed that the microcavity electroluminescenceefficiency was greatly enhanced.

The hydrogen maser isthe most stable frequency standard generally available today for all but the shortestmeasuring time. It's an important subsystem in VLBI. This paper will describe theperformance of hydrogen masers used in Nanshan VLBI station.

The principle ofmeasuring the PM10 content in ambient air using β ray and the characteristic of G-M counters are describedin this paper. The statistical characteristic of data and the foundation of dataprocessing are analyzed. The method of composing system of measuring PM10 content and thearithmetic of data processing are provided.

In this paper, datumobtained by multiwavelength UV-DIAL lidar at Anhui Institute of Optics and Fine Mechanicsare used to compare the effects of temperature and aerosol on singlewavelength (308 nm)and two-wavelength(308－355 nm) DIAL with backgr ound stratospheric aerosol. Results of twomethods show that the effects are larger for single-wavelength DIAL but less fortwo-wavelength DIAL. Calculated results of two methods are different distinctly. A meanvalue of 30 days show difference of ozone results measured by single-wavelength andtwowavelength is comparably large below 19 km altitude. Relative errors ofsingle-wavelength to two-wavelength are less than 12% from the height of 19 km to 35 km.

Turbulence has long beenrecognized as one of the must significant effects on the performance of optical systemsoperating in the presence of atmosphere. Of all the turbulent parameters, the mostimportant and used most frequently is refractivity structure constant C2/n/.Because of the relation between the refractivity and temperature, C2/n/can be calculated from he temperature structure constants C2/T/. But C2/T/is not easy to measure. In the paper, the meteorology data from the East China Sea and thereservoir on the west suburb of Hefei city and its vicinal land are analyzed. According toMonin-Obukhov similarity theory and semiempirical relationships of Wyngaard, thetemperature structure constants are obtained. and they give well agreement with C2/T/measured directly.

In this paper, a kind of915 M microwave radar was discussed. It can be used to get the wind profile and the Cn/2/profile from 100 m to 3000 m in the atmospheric boundary layer. It also can get thetemperature profile from 100 m to 1000 m while the RASS component was added. The theoryand signal process of the radar were introduced and then some experimental verificationswere given.