Propagation of laser pulses in multilevel photoionization systems under Doppler broadening

Abstract

Propagation properties of two laser pulses in multilevel photoionization atomic vapor systems are researched theoretically under the circumstances of Doppler broadening and two isotopes. It is shown that group velocity dispersion and ‘concomitant oscillation’ of laser pulses exist during laser propagation. The influences of Doppler broadening and isotope shift on laser propagation properties, atomic ionization yields and selectivity are studied. Besides, variation in r-direction is taken into consideration to approach physical practice. The simulation results provide references for experimental design in laser isotope separation (LIS).