Optical Switching in Chalcogenide Glasses
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One of the key problems in developing all-optical switches is to obtain high switching speeds by using purely electronic nonlinearities. To have an efficient switching process, there should be no generation of real populations or carriers which would limit the switching recovery speed. There should also be no loss involved in the process of switching. There are therefore a set of material constraints or figures of merit to be considered. It is helpful to examine first the effects of linear and nonlinear absorption in a waveguide. In order to have an optical-switching operation, a pump or control pulse must produce a sufficiently large nonlinear phase shift. The integral of the intensity over the device length gives the total phase shift accumulated in the waveguide.
KeywordsInput Power Normalize Output Power Chalcogenide Glass Gate Pulse Switching Energy
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