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Time-resolved self-defocusing in Cd0.23Hg0.77Te and InSb

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Abstract

We describe an experimental study of self-defocusing in Cd0.23Hg0.77Te and InSb at room temperature using a hybrid CO2 laser at 10.6 μm. The time-resolved transmitted temporal pulse profiles showed the effects of refractive-index changes of up to Δn ~ 0.1 caused by the electronically induced optical nonlinearity. Thermally induced contributions due to dn/dT ~ −1 × 10−3 K−1 in CdHgTe were also measured.

© 1986 Optical Society of America

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