Abstract

The steady-state degree of ionization produced by multiphoton processes under bistable conditions is investigated. We show that the presence of recombination leads to a bistable steady state, with the degree of ionization abruptly increasing as the incident laser intensity I_i is increased beyond a certain critical value I_i1 and abruptly decreasing as the intensity is decreased below a second critical value I_i2 < I_i1. Effects of dispersion on the bistability characteristics of the steady state are considered.

© 1981 Optical Society of America

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