Patent ID: 9166679
Filing Date: 2015-10-20
Classification: H04B,H04J

Abstract:
1. An optical amplification apparatus, comprising: an optical amplification medium configured to receive a first light signal input from a first end of the optical amplification medium and a second light signal input from a second end of the optical amplification medium in opposite directions, the first and second light signals being divided from a light signal; an excitation light source configured to supply excitation light to the optical amplification medium through a multiplexer; a monitor configured to monitor the first light signal input to the optical amplification medium with respect to a first threshold value and second light signal input to the optical amplification medium with respect to a second threshold value, respectively and to output monitor signals respectively; and a controller configured to determine a failure in the first light signal if the first light signal is less than the first threshold value and determine a failure in the second light signal if the second light signal is less than the second threshold value and control the excitation light source in accordance with the determinations.