There is at present a growing interest in developing photonic switching and signal-processing devices for future applications in communications and computing. In this paper we will briefly outline some of the reasons for this interest, and then describe some recent work on ultrafast all-optical switching devices using glass as the nonlinear material. We will conclude with some speculations regarding the future prospects for photonic switching.
P W Smith,
"Photonic Switching: Present Research And Future Prospects.", Proc. SPIE 0881, Optical Computing and Nonlinear Materials, (3 May 1988); doi: 10.1117/12.944058; https://doi.org/10.1117/12.944058