A new theory of colling pulse mode-locking of dye lasers is presented, Its physical picture is clear. It gives better illumination on the properties of the mode-locked pulses, especially those of frequency.

Asymmetric output is obtained when a feedback is introduced in a ring laser to force part of the traveling wave into the other. The coupling between both waves plays an important role in such a device, The output rotio of the traveling wave- is obtained experimentally to be 40 for a Ou vapor laser and 60 for a dye laser pumped by argon laser.

A new type of demodulation method is presented. It has correlative detection property, thus the detected SNB increases remarkably.

Photophysical characteristics of B6G-8 oyclodeztrin system in aqueous solution have been examined by means of steady and time resolved fluorescence methods. The obtained Jesuits are discussed.

Optical unstability can be observed by means of surface plasma wave (SPW) technique. Theoretical calculation for prediction of optical unstability by SPW has been obtained and some experiments were carried out, optical unstability of self-pulsing, bifurcation and chaos were observed.

Frequency doubling and mixing of active and passive mode-locked YAG laser light have been accomplished using two types of KDP crystals. When the incident laser power density on the crystal is 1.27GW/cm2, stable UV laser output at 364.7am has been, obtained with pulse width of 32 ps, peak power 30 MW, average power 60 mW and pulse repetition rate of 20 Hz.

A set-up for passively mode-looked ruby lasar with chlorophyll d as saturable absorber and the experimental results are reported. The sholrtest pulsewldth of about ,1,5 ps was measured by TPF method.

A multiplexing technique for holographic interferometry is proposed which uses multiple reference beams to encode and record holograms. The experimental results are presented.

The adsorption of pyridine and SON- at silver electrode is investigated using the experimental results of SEBS spectra of pyridine, SON- and their coexistent system. It is-shown that pyridine and SON- absorb at silver electrode surface through chemisorption.

Basic properties of magneto-optical thin films are discussed. The method of thin film optics is used to study the interference enhancement of the magneto-optical effect. As an example, the design considerations of megnetic film TbFe are given.

The distribution function of the light beam which has passed the medium is solved by starting from the radiative transfer equation of light in the scattering medium and introducing visually the gain function. The results are in good agreement with those of the experiments, and the forward scattering coefficient and extinction coefficient has been obtained.

A polarization method for measuring- the stability of optical reference cavities is reported. Measurement with I2 stabilized He-Ne laser (the stability is less than 2 X 10-10) and sampling time of 0.01s confirmed that the stability of a tested cavity was about 1.3x10-9.

By means of single periodic layered phase grating and based on the revolving field principle for velocity direction discrimination, a laser Doppler vibrometer system has been developed, which provides a potential method of velocity measurement. The theoretical analysis and experimental results of the system are presented.

The fast processing of thick multimode optical waveguides has been studied, it has higher coupling efficiency with multimode optical fibre by using Li+-Na+ ion exchange technique, and the measurement results of the waveguide are analysed.

Laser irradiation on the incubation of poultry eggs is reported. The results ara as follows: the average hatchability of Leghorn’s eggs was increasedd by 9.6% after laser irradiation and that of quail’s eggs was increased by more than 11%.

This paper presents the development and experiment of pulsad magnets of PEL. The magnet can offer 0-20 kG magnetic field and the lifetime is very long. Experiments have shown that its field uniformity is 0.011% in the area of 14 mm along Z-axis from +400 to -400mm(centre point is zero).

The effects of preionisation alit width and different buffer gases on the excimer lasser output are reported A comparison of laser outputs with and without gas cycle has been made.

In the paper we describe the experimental monitor by comparing the Young’s interference fringes of lasers. The monitor range is 200-1000 nm with an accuracy of 2x10-6.

A simple method for multiplexing holographic interferometry is proposed by means of angular orientation-Fourier holography.