Abstract The intensity-dependent nonlinear refraction phenomena in a non-resonant multilevel molecular system is studied using rate equations in steady state, including saturable refraction, reverse saturable refraction, and the turnover between these two effects. The relationship between the refraction saturation and the optical Kerr effect is also discussed.
Received: 23 August 1999
Revised: 22 December 1999
Accepted manuscript online:
PACS:
42.25.Gy
(Edge and boundary effects; reflection and refraction)
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