Acta Optica Sinica, Volume. 1, Issue 4, 379(1981)
Nonlinear index in the gain medium
The nonlinear index of refraction induced by stimulated transition of high level populations in the gain medium is investigated. Taking example of active Nd:glass, we have specifically calculated the law of index changing with laser intensity. Several physical effects related with this nonlinearity, as self-defocusing, self-modulation, nonlinear aberration, pulse distortion etc. are indicated.
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FAN DIANYTTAN. Nonlinear index in the gain medium[J]. Acta Optica Sinica, 1981, 1(4): 379