Abstract
We report, for the first time to our knowledge, the operation of a cascadable, low-optical-switching-power small-area high-speed ( fall time) all-optical inverter. This inverter employs cross-gain modulation, polarization gain anisotropy, and highly nonlinear gain characteristics of an electrically pumped vertical-cavity semiconductor optical amplifier (VCSOA). The measured transfer characteristics of such an optical inverter resemble those of standard electronic metal-oxide semiconductor field-effect transistor–based inverters exhibiting high noise margin and high extinction ratio , making VCSOAs an ideal building block for all-optical logic and memory.
© 2007 Optical Society of America
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