Patent ID: 7978319
Filing Date: 2011-07-12
Classification: G01J,G01R,G02F,H04B,H04J,H04Q

Abstract:
1. An optical switching method, comprising: (a) monitoring power of an output pulse light of a polarizer which receives a signal pulse light extracted from an output pulse light of a nonlinear optical medium, which receives an input signal pulse light and a control pulse light, and controlling a polarization state of the input signal pulse light to the nonlinear optical medium so that the power becomes minimum; (b) monitoring the polarization state of the input signal pulse light, performing a predetermined conversion of the polarization state of the input signal pulse light, and recording a polarization state obtained by the predetermined conversion; and (c) monitoring a polarization state of the control pulse light with respect to the input signal pulse light and controlling the polarization state of the control pulse light so as to coincide with the polarization state of the recorded input signal pulse light.