Above 6 Hz,the Q c( f ) of Yunlong station is gradually lower than that of Tianxin station,which is the consequence of nonelastic absorption in the fragmental zone of Fawo Chadian Fault.

Progress in the optical limiting materials for nonlinear absorption;

Study on thermal optical limiting induced by linear and nonlinear absorption;

The nonlinear absorption properties of two metallic clusters were studied using 8 ns laser pulses at 532 nm.

A concept about a new kind of nitegral photonic "transistor", using saturation absorption nonlinearity of the wead saturation optical intensity parameter of photochromic material, is put forward in this peper.