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Interference Wedged Structure for Remote and Purely Optical Intensity Control of a Powerful Laser Beam with a Low-Intensity Light

We develop our proposed devices, compact instruments for controlling powerful light by light, based on Interference Wedged Structures (IWS) that allow tuning for desired wavelength. The device (acting as optical transistor) exploits that the IWS's (CIWS's) gap with saturable absorber can be additionally illuminated by control light beam directly from the top open side of the IWS. The device can be used in scientific apparatus for laser pulse formation and in optical communication systems operating in high electromagnetic noise.