OPTICAL IDENTIFICATION REPRODUCTION CIRCUIT

摘要

PURPOSE:To output an identification reproduction optical pulse synchronously with a clock light by outputting an output light from an optical control light emitting element as an identification reproduction light with respect to an input signal light and feeding back the light to an optical switch as a feedback light. CONSTITUTION:The circuit is provided with an input port 301 for a signal light being the object of identification reproduction, an input port 302 for a clock light whose intensity is changed at a prescribed period and a feedback light input port 303. Moreover, a light Kerr switch 304 selects an input signal light or a feedback light corresponding to the intensity of the clock light and outputs a signal light corresponding to the intensity of the selected signal light. output light of the optical control light emitting element is outputted as the identification reproduction light and fed back to the light switch 304 as a feedback light. Then the holding of the signal light in a closed loop circuit and the input operation of the input signal to the closed loop circuit are switched synchronously with the clock light. Thus, the identification reproduction light corresponding to the input signal light and synchronously with the clock light is outputted from the light control light emitting element.