The system of NCl(a1△)/Ⅰ draws people attention since Botter and Yang reported NCl(a1△)/Ⅰ transfer reaction in 1990. This paper reviewed researches of NCl(a1△) and NCl(a1△)/Ⅰ reactions, analyzed and calculated the system in theoretically. In finally, the possibility of a chemical iodine laser pumped by NCl(a1△) was discussed.

High concentration Er3+Yb3+ co-doped silica glass waveguide amplifiers are numerically analyzed. With optimized rare-earth concentration the effect of Er3+ Er3+ ion pairs can be neglected. The numerical results demonstrate the possibility of fabricating short- and high-gain integrated optical amplifiers.

In this paper, a novel numerical approach to calculate properties of the integrated optical waveguides is introduced. Based on the calculated propagation constants and optical power transmissions along taper and Y-branch optical waveguides, a briefly review of the approach is given. We compared the novel approach with widely used FD-BPM quantitatively, from which advantages and limitations of the approach are derived.

A theoretical model through which non-linearly chirped fiber Bragg gratings can be properly designed for high-order dispersion compensation is presented and the relationship between the effective refractive index and the chirp coefficients of chirped fiber gratings is obtained. Good agreement is obtained between the theoretical calculations using our model and the numerical simulation results based on the transfer matrix method.

Propagation of optical solitons in fiber amplifiers is discussed by considering a model that includes loss of fiber, two-photon absorption, third-order dispersion effect. We use the time-dependent Hartree approximation to obtain solutions to a quantitative high-order nonlinear Schrodinger equation (NLS), It describes optical pulses propagating in fibers amplifier, under certain conditions soliton solutions exists, the solution for influence of soliton propagation as well as classical and quantum effects are discussed in detail. Further we find that mean value of the field in fiber is the superposition of a series of classical solitons with corrections.

A method of image edge detection using the combined neural network is proposed in the paper. The combined neural network is composed of self-organizing competitive neural network and BP neural networks. With genetic algorithms, the image edge detection of lumpy materials is realized by learning and training.

In this paper, the generator of arbitrary shaping electrical pulse is realized successfully by using the voltage-controlled-current and on/off properties of GaAs field-effect transistor (FET). The waveform of the generated basic electrical pulse is the same as the trigger pulse, and the amplitude is dependent on the minus bias voltage. Each generated basic electrical pulse of all the basic circuits is independent on another, and this will make the computer-controlled arbitrary shaping electrical pulse generator possible.

A method to improve ring erbium-doped fiber laser's SNR is presented .An EDFL's SNR is improved 5.2 dB. The laser has been used in an experimental WDM transmission system to serve as the light source. It is qualified for the transmission of 1.2 Gb/s RZ, 2.5 GHz analogue signal and 5 GHz analogue signal over 100 km.

The paper discussed the transmission characteristics of phase-shifted fibre grating by using transmission matrix and the minimum KL needed when the concentration of fibre was given.

Spectral radiant characteristics of integrating sphere was experimentally studied in this paper. Absolute spectral radiance and its uncertainty from an integrating sphere with 1200 mm inner diameter and 200 mm exit diameter were measured within 350-2500 um. The stability, linearity, planar and angular radiant uniformity were characterized as well.

In this paper. we made comparison experiments with benzene, toluene, xylene and their gas mixtures and motorcycle exhaust gas using HEMPI/TOFMS and GC. The experiments verified the reliablity and accuracy of the data obtained by REMPI/TOFMS, and we can see the advantage of REMPI/TOFMS in the respect of the high measurement speed, real time, on-line and multi- components detection.

In this paper, the reason that cause tile solar spectrum shift in the experiment of the pollutant measurement in urban air by differential optical absorption spectrometer using the sun as light source was discussed, and the method that solved this problem was described here. This method proved to be suitable for solving this problem through the practical application.

The fidelities of quantum states and the cross-correlation function between atoms in the non-degenerate two photons Tavis-Cummings model in two-mode vacuum field are studied b means of quantum theory. The influence of dipole-dipole interaction between atoms and different atomic initial states on the fidelities of quantum states and the cross-correlation function between atoms are discussed. The result shows that the two no-correlation atoms initially situated in excited state behave correlated character in the condition of interaction with two-mode vacuum optical field and dipole-dipole interaction between atoms. While the two atoms initially situated in ground state behave no-correlation, and the quantum state of all system, optical field and atoms do not lose fidelities during evolution.

In the paper, we discussed tile evolution of the squeezing, particularly, the effect of damping on higher-order squeezing in the superposition coherent states (Schrodinger cat states), which are generated by superposing a pair of coherent states |α> and |-α) In the initial stage of the field forming, the higher-order squeezing is unstable, the parameters of higher-order squeezing will be oscillatory along with the time elapsing. The states of the field will be Kth-order squeezing or non-squeezing alternatively and tends to stability at last, the absolute value of squeezing parameter reduces and approaches zero. Increasing damping will speed up the evolution process, damping weakens squeezing.

A scheme is presented to generate the entangled squeezed coherent states via the nonresonant interaction of a two-level atom with a two-mode cavity field. When the detuning between the atomic transition frequency and the frequency of each mode is much large, the probability of atomic transition can be neglected. After the interaction of the appropriately prepared atom with the cavity field that are initially prepared in squeezed coherent states of each mode respectively, the entangled squeezed coherent states can be obtained by state-selective measurements on the atom.

The methods of applying Kalman filter theory to laser radar tracking system are developed. Radar measurement model and target dynamics models are described. The linear-zation methods of tracking target model and their influence upon the accuracy of filtering are analyzed. The technique of tracking target in laser radar is presented.

Photocurrent spectrum for GaAs/AlGaAs superlattice at T = 77 K was measured. A strong photocurrent peak at ■ = 1598 cm-1 in the photocurrent spectrum was observed. It;was believed that the strong photocurrent peak is relevant to electron reflection at interface in superlattice. On the basis of the point of view, calculated position of peak of photocurrent is in very good agreement with experiment result.

According to perturbation theory for degenerate energy level, a system of two coupled quantum dots has two energy levels-symmetric state energy level and anti-symmetric state energy level. When an electron tunnel in a quantum dot, it. oscillates in the system. We have studied the probability of one electron on the two energy levels.

The online measurement system for chlorine utilization in COIL has been designed and used .The experiment indicated that the system is simple and convenient. In the experiments of Jet-COIL, chlorine utilization was obtained which is in agreement with the theoretical computation of the Jet-COIL. This measurement system is essential for COIL study.

The frequency doubling process in crystal has been reconsidered based on the theory of partial coherence in this paper. Two point P2 and P1 in the exit plane of the crystal is defined by the incident fundamental wave passing through lattice of which the primitive vectors are a and b respectively. Then the mutual coherence function of the light vibration at this two points at the frequency 2ω0 is calculated with the transformation technique in the frequency domain. Through introducing the definition p(ω) and its solution, the theoretical description of distribution of radiant intensity of the second harmonic wave excited by the incident fundamental wave based on the theory of partial coherence is finally obtained.