Output modes of a pair of coupled lasers as a function of the optical pump intensity on the second laser. The first laser turns off, and later both lasers begin to lase
Researchers have designed coupled lasers that act as general-purpose optical logic gates
High hopes have been maintained for decades concerning optical logic, optical switching matrices (e.g. for communications), and optical computing. The missing link in actualizing this promise is a practical circuit element that allows one light to be turned on or off purely by application of another light to the device - rather like voltage on the control gate of a field effect transistor. This missing link has now been developed through a novel application of the complex behavior exhibited by coupled lasers.
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