Self-defocusing and self-phase modulation in InSb measured with picosecond infrared pulses
- 1 December 1985
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 47 (11) , 1190-1192
- https://doi.org/10.1063/1.96323
Abstract
The nonlinear distortion of the beam profile by self-defocusing is studied at the absorption edge of InSb with tunable picosecond pulses. In addition, the rapid change of the refractive index Δn is monitored by self-phase modulation of the infrared pulses. A quantitative analysis of the results gives a Δn≂4×10−2 at a pulse energy of 10−6 J. The optical nonlinearity occurs on a time scale shorter than 4 ps.Keywords
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