Patent ID: 9071350
Filing Date: 2015-06-30
Classification: H04B,H04J

Abstract:
1. An optical receiver to receive an optical signal multiplexing a plurality of signals each having a specific wavelength different from others, comprising: an optical de-multiplexer to de-multiplex the optical signal into a plurality of de-multiplexed signals; a plurality of optical devices each converting the de-multiplexed signal into an electrical signal; a signal processor for extracting a clock contained in one of electrical signals output from the optical device; and a controller configured to decide a failure occurred in at least one of signals by receiving the clock extracted by the signal processor and the electrical signals each output from the optical devices, wherein the controller includes a temporary register, a first arithmetical unit, and a first comparator, the temporary register storing the electrical signals in a magnitude thereof, the first arithmetical unit calculating time variations of the electrical signals that are compared with a first reference by a first comparator.