The instantaneous measuring of spatial intensity distribution of high Power laserpulses using CCD detectors is very useful in the research of the laser beam quality and itsspatial construction. In this peper the measurement techniques of using 1-and 2-dimensionalCCD detectors, the Data Sampling Card and Multimedium Card are presented. Using thesemethods, we have obtained good experimental results.

This peper discussed the variance of chirp and width of the optical pulse and therelation between the variance of chirp and spectral phase as the chirped optical pulse weretransmitted in single mode fibers. The physical meanings of chirp variance and itsapplication in optical fiber communication are presented. The experimental resultS of pulsewidth variance in normal and anomalous dispersion fibers were fitted well with theoreticalresults.

A new method to overcome the Pplarization- induced fading (PIF) in theconventional low-bireftingence optical fiber constructed interferometric sensor is proposed.By adding high-frequency modulation to the state of Polarization in the output arm of aninterferometer, the maximum PIF variation in the sensing signal is 4. 7 dB or 6. 3 dB(depending on the choice of maculation model). By either adding an electronicallyautomatic gain control circuit or dividing the signal by the interferometer's visibility, the signal fading is recovered at the expense of a relevant degradation of the signal/noise ratio (SNR).

A domain-inverted grating is realized by using a scanning electron microanalyzer.Domain inversion in Z- cut LINbO3 by injecting electrons into C- face was Observed. It wasfound that the scanning trace on the crystal surface tended to segment and the inversionwidth near the crystal surface was thinner than that inside the crystal. With different scanrates and beam currents, we get different domain widths and depths. The domain inversionmechanism was also discussed roughly.

in order to obtain the reference dynamic model for the adaptive control of thechaotic optical system, a suggestion of identifying the chaotic optical system with the BPfeed forward neural network supported by the BP algorithm is made in this peper. Thefeasibility of this suggestion was demonstrated with the ctrpputer simulation throughidentifying a Bragg acousto-optic bistable &. chaotic system with a very simple 1: 4: 1 BPNN. The result of the computer simulation shows that the three-layer BP foreward NN, if trained with the BP algorithm, is indeed a fine identifier. Thus it could be used to reconstruct the dynamics of the chaotic optical system efficiently with its output time series with a satisfactory precision.

In this Paper an approach of frequency-domain filtering has been Proposed toimplement mathematical morphologjcal centroid scale-space optical-eleCtronic hybrid imageparallel transformation, in which the filter has ben designed and made by means of CGH (computer generated holograms). This filter is used as a structure element of themathematical morphological centroid scale-sauce optical- electronic hybrid image parallelProcessing system. The binary and grey level imase centroid scale-space transformation has been implemented using this approach.

The magneto-optical properties of a Al/BiGaDyIG double layer fine grain thinfilm crystalized with a rapid recurrent thermal annealing method has been investigated. Theeffective Faraday angle of the double layer film is over about 0. 25 degree than that of thecommon single layer film, and its Faraday angle inereases with the number of the rapidrecurrent annealing increased, which is due to the fineness of the grains and the interfaceinterference between the Al film and the garnet film. Meanwhile, the Al+3 ions diffuse into garnet film and substitute the Fe3+ ions in octahedral and tetrahedral sites, it results in a decrease of Curie temperature (140～161 ℃). These results are very promising for increasing the recording density and signal-noise-ratio.

Bi- substituted garnet films are most promsing of the next generation of themagneto-optical recording medium. In this paper we present the construction of a newoptimization objective function, which combines readout and thermal writing in a magnetooptical recording process. The method proposed is succeeded in the optimization design ofmagneto-optical disks, the structure of which is Bi-substituted DyGaIG/metal reflectivelayer (Al)/Glass. The result shows that the new optimization objective function would have more realistic significance.

Based on the chirp-encoding and high Pass filtering, the multitarget detectionusing a chirp-encoded joint transform correlator with high pass filtering is proposed. Thistechnique focuses the desired cross correlation terms between the reference image and thetarget images and the undesired terms, including D. C. term, self- correlation termsbetween the target images and various higher-order correlation terms, onto separated outputplanes. Thus it has higher accuracy of detection. Computer simulation results for the input gray-scale multitarget scenes are given.

A new pseudocolor encoding method for rainbow holography is introduced bygiving a sinsle three-dimensional object one color, and different objects different colors. Theshelter effect is produced with different colors so that it increases stereo sense. Theexperimental result is presented.

A high power Q- CW diode laser arrays side- pumped Nd:YAG laser istheoretically and experimentally studied. A pulse energy of 16 mJ at the wavelength of 1064 nm under a pump pulse energy of 135 mJ is obtained. The maximum pulse repetitionrate is 400 Hz.

The properties of Polarization of ES-Laser are analysed through Jones vectors andJones matrixes. The Jones transformation matrix representing a round trip of the ray in thelaser cavity has been obtained. The properties of self-reproduction of polarization mode havebeen achieved. The variation regulation of polarization loss with the incidence angle to theend face of the laser medium is discussed, and the calculation results are presented.

In this paper the soliton interaction is analysed for the first time by means of ananalytic method. It shows that the amplitude modulation can control not only the solitoninteraction effectively but also the soliton frequency shifting.

The development of the Table Top Terrwatt laser system has opened a newhorizon for the laser-matter interaction. In this paper we will review the lastest experimentson intense ultrafast laser produced hot, dense plasmas carried out at INRS and discuss theapplication of such plasmas in atomic physics and radiation confined plasma Physics.

The coupling of two nonequal-amplitude linear polarization solitons in lowellipticity birefringent optical fibers is analytically investigated. By analogy withparametrically excited solitary waves in a trough resonator, the mechanism of energytransform between coupled solitons in two channels is discussed in a dynamic POint of view.The first-switching distance L1 and the alternative period L2 are numerically determined andthe cause of L1>L2 is analyzed. According to the coupling behavior of solitons, an idea of all-optical soliton switching is proposed, which permits to fluctuation of the amplitudes and other parameters of the control and signal pulses in larger ranges.

It is found that the slow change with time of spatial self-phase modulation due tothermal self- focusing effect can be compensated with a self-pumped phase-conjugate mirrormade of Cu .doped KNSBN crystal. The experimental results show that phase-conjugationfluctuates irregularly, but the wave-front distortion can be well corrected with the phaseconjugate mirror.

The mechanism of the χ(2) generation in quartz glass in conditions of an externalstationary field and heating is studied by the nonlinear oscillating theory from the viewpointof structural adjustment and rearrangement. The results agree well with relevantexperiments.

Using NCPM technique, we construct a synchronously Pumped fs infrared OPO.Tuning of the output wavelength of this OPO is realized via changing the Pumpingwavelength, and its tuning range is 1.08～1.13 μm. Under a pump power of 1.1 W of a90 fs Ti:sapphire laser, the average output power of the synchronously pumped OPO is100 mW, and the pulse duration is about 60 fs.

In a previous paper we have Obtained the exact solution for the reflection of twolevel atoms by an evanescent laser wave. In this peper we numerically calculate thedependence of reflection coefficient on the incidence angles a for the atom. We also compareour results with those of classical optics[7]. The comparison shows that there are somesimilarities while some difference exists. Finally some Physical explanations to the results aregiven.