The formation and quenching processes of triatomie excimers following short duration electron beam excitation of high pressure rare gas halide mixtures have been investigated. Formation of triatomie excimers have been shown to occur mainly as the result of intermolecular reactions involving diatomic excimers as precursors. The three-body formation constants and quenching rates for collisional deexeitation of Xe2Cl, Xe2Br and Xe2F by rare gas, buffer gas and halogen donors and lifetime of triatomie excimer are reported.

This paper discusses the CW laser oscillation process using the stationary state solutions of the optical Bloeh equations. The derived formulas on gain and saturation effect, dispersion and frequency pulling of the laser material agree with the results obtained by the third order approximation of the non-diagonal element of density matrix in Lamb’s semi-classical theory and this method simplifies the mathematical processes.

A model for single longitudinal mode semiconductor laser with internal-reflection optical coupling is proposed. The spectral characteristics have been calculated with the principle of the resonant amplifier. The results showed that the single longitudinal mode output can be obtained if the laser with adequate cavity length were coupled.

LiF:F2- crystals have the advantages of high efficiency, convenience and stability when they are used for Q-switching of Nd glass lasers and the linewidth narrowing can be achieved in particular.

In this paper, we report a lead salt tunable diode laser fabricated by HUVG. At 12K, the threshold current is 1.6A, the emission wavelength is 10.2μm.

This paper reports the investigation on special noise in an intracavity He-Ne laser. It is induced by a spatial magnetic field which consists mainly of earth magnet. Based on the theory of Zeeman laser and dispersion character of laser medium, the production mechanism and the regularity of magnetic induced beat noise are explained. Finally some methods for eliminating this noise are suggested.

The resolution of the acousto-optic deflector is analyzed by means of modulation transfer functions. The relation between the modulation transfer functions of acousto-optic def lector and Gaussian pupil is established. The resolution can be increased by properly selecting the truncation ratios of acousto-optic media and Gaussian beam (nearly 1/e2 beam width).

In this paper some design considerations for the optimization of Faraday rotators and the programin for computation are presented. A Faraday rotator with 120 mm clear aperture have been developed. The experimental data are in good agreement with the calculated ones with a deviation of less than 2%.

The end fire coupling between the single-mode optical fiber and the Ti-diffused LiNbO3 single-mode planar optical waveguide has been studied. Here we report our measurements of the field intensity distribution and the experimental results of coupling efficiencies under the influence of various alignment tolerances. Using a photoresist to produce a microlens directly at the end of a fiber. The Gaussian waist diameter of the fiber output is reduced and the coupling efficiency has been improved by 1.47 times, which is conformable with the theoretical values.

Application of magneto-optic materials of garnet single crystal films in ring laser gyroscopes, bias frequency properties of the garnet magnetic mirror and comparison of the garnet magnetic mirror with the metal magnetic mirror are sammarized. Growth technlogy and magneto-optic preperties of single crystal films of (BiPrGdYb)3(FeAl)5O12, and experimental results in a ring laser gyroscope of bias frequency of the garnet magnetic mirror are reported.

In fluorophosphate laser glasses light scattering and laser damage are caused mainly by solid inclusions which result from the liquid-phase separation and crystallization. Further decrease of damage threshold is considered to be caused by the precipitation of impurities such as Fe, Cu, Ni, Si etc.

We have studied the growth and the structure of HoP5O14 crystals. The crystal face and geometric forms have been analysed, the absorption, excitation fluorescence and infrared spectra have been investigated and the 5I7-6I8 transition of Ho8+ in HoP5O14 at 2 046μm have been determined for the first time.

The transient photo-electric effect of the photodiode is analyzed by means of capacitor discharge and charge. We have measured the pulsed laser energy and developed the corresponding automatic energy monitor. It can detect laser energy of down to 0.lμJ.

The measurement and analysis of the TPF patterns of ultrashort pulses using closed-circuit TV with memory systems are introduced briefly.

The effects of X-ray irradiation dosage on laser discharge of the excimer laser as well as the laser output energy have been investigated. Analysis and discussion on the experimental results and X-ray absorption of various laser mixtures are presented.

The relations among the gain coefficient of a transverse flowing CO2 laser, the discharge time, locations and compositions are measured. The qualitative explanations are given.

A laser power meter having a mirror of 120°big cone angle and a long absorbtion cylinder is described. It has two sets of symmetrical structures for photo-thermal conversion and electrical calibration. The measurement range is 30-1000 w with an accuracy of ±5%.