Patent ID: 8774620
Filing Date: 2014-07-08
Classification: H04J

Abstract:
1. An optical transmission apparatus comprising: a wavelength multiplexer unit configured to multiplex wavelengths of input/output light rays; a first optical switch configured to input/output the light rays to/from said wavelength multiplexer unit; a control light processing unit configured to input/output control light rays; a control light controlling unit configured to perform multiplexing or splitting between a control light ray and a light ray delivered out of said wavelength multiplexer unit; a second optical switch arranged between said control light processing unit and said control light controlling unit, the second optical switch configured to input/output the control light ray; and a supervisory control unit configured to control an on/off state of a control so as to fold the inputted light ray with respect to said first optical switch and with respect to said second optical switch; wherein the second optical switch is configured to switch a path that the control light ray is passed on between the control light processing unit and the control light controlling unit by controlling the on/off state of the control by the supervisory control unit so as to fold the inputted control light ray, wherein the control is such that the control light ray from the control light processing unit is folded on a path with respect to the control light processing unit, and the control light ray from the control light controlling unit is folded on a path with respect to the control light controlling unit.