n this paper,the authors report the temperature dependence of homogeneous line width in photon-gated spectral hole burning materials:metal-tetrabenzoporphyrin derivatives/p-hyfroxybenzaldhyde/PMMA or CA,at a temperature range,from 30K to 70K.

The dependence of hole depth on pulse number were observed and hole burning quantum efficiency with different laser power were obtained.

The phenomenon of spectral hole-burning in homogeneously broadened media and the experimental slowing of light in ruby are described.

Mathematic relations between system characteristics, materials characteristicsand read/write condition are established for holographic grating spectral hole-burningtechnology.

With the transient solutions of optical Bloch equation the dependences of hole width and depth on the burning pulse duration have been discussed in spectral hole burning of two level system.

And then the progress of three-dimensional optical storage, the principle of data storage, as well as problems of various ways of storage need to be solved about 2-photon 3D optical storage, spectral hole burning for data storage, holographic storage, and thre.

The present paper report the research results on inhomogeneous broadening, fluorescence line narrowing, high temperature persistent spectral hole burning, mechanism of hole burning, hole burning dynamics and thermal stability of spectral holes.

Progress in application of laser ablation inductively coupled plasma mass spectrometry in metallurgical analysis;

Ag nanoparticles colloids produced by pulsed laser ablation in distilled water;

Progress of quasi-one-dimension nanomaterials synthesized by laser ablation;