Abstract:Nonlinear absorption can limit the efficiency of nonlinear optical devices. However, it can also be exploited for optical limiting or switching applications. Thus, characterization of nonlinear absorption in photonic devices is imperative. This work used the nonlinear transmittance technique to measure the two-photon absorption coefficients ( 2 ) of AlGaAs waveguides in the strip-loaded, nanowire, and half-core geometries in the wavelength range from 1480 to 1560 nm. The highest 2 values of 2.4, 2.3, and 1.1 c… Show more
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