| Multiplex pulsed digital holography is a new probing technology which using the ultra short pulsed laser as light source and combining digital holography.Because of its high temporal resolution,in the detection of super fast transient process has unique advantages and broad application prospect.This technology has achieved femtosecond laser ablation of metal,ionizing air and ablation deionized water super fast detection of transient process.In this paper,in view of the problems in present study,such as the energy distribution of pump-prob system is not accurate,the zero term effects the qulity of the reconstructed image and the neighboring frequency spectrum interference each other when the multiplex hologram reconstructs,carrying out the works of energy measurement of pulsed digital holography pump-probe system,zero term suppression and demultiplexing in the multiplex hologram.The concrete contents are:1.Energy measurement of pulsed digital holography pump-probe system.Firstly,calculating the energy efficiency of the experimental system.Secondly,measuring the threshold energy of the charge-coupled device which used to detect the interference fringe.Finally,calculating the lowest energy the detecting system needs.The reasonable distribution of pump energy and detection energy is realized.2.Research of the zero-term suppression of multiplex hologram b ased on iteration.The applicability and advantages and disadvantages of the existing theories are analyzed.Reaearching the zero-term suppression of multiplex hologram using the iteration.Reducting the theory and proving its validity using simulate experiment.3.Research of the demultiplexing in the multiplex hologram based on interference decimation.Demultiplexing the multiplex hologram using above method,reducting the theory and proving its validity using simulate experiment. |
