Interferometry Measurement of Laser Induced Plasma Density and Improvement

摘要

In interferometry measurement of density of plasma induced by pulsed laser, the external triggering signals are used to trigger flash lamp and Q-switch of main laser (Nd:YAG) and probing laser (N_2 dye laser), in order to eliminate the jitter, a pre-delay unit and two delay units are used to get the delayed triggering signals for Q-switch of main laser and probing laser respectively, another innovative design is to replace the wollaston prism with a biprism, so that the polarizer and analyzer can be exempted, the loss of probing light can be lessened, and image of higher resolution can be achieved.