OPTICAL LIMITING IN SEMICONDUCTORS

Abstract
The nonlinear absorption coefficients of Si from 146 to 452°K and of CdSe, CdTe, and GaAs at 300°K were measured with a Nd:YAlG Q‐switched laser. The reported stepwise nature of nonlinear absorption for Si is confirmed, but the assignment of a three‐photon process is uncertain. As an optical limiter, the optimum Si thickness to be inserted within a Nd:laser cavity is discussed.

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