Patent ID: 7697845
Filing Date: 2010-04-13
Classification: H04J

Abstract:
1. Optical transmission equipment comprising: an optical amplification function part; and an optical drop function part, wherein the optical amplification function part includes: an optical amplifier connected to a transmission line to amplify an optical signal received from the transmission line; and a first laser safety part for controlling said optical amplifier based on the power of output light of the optical amplifier and on the power of reflected light to said optical amplifier, and said optical drop function part includes: an optical coupler connected to the optical amplification function part to split the optical signal received from the optical amplification function part; an optical demultiplexer for wavelength demultiplexing a first output optical signal of the optical coupler; a reflected light mask part for receiving a second output optical signal said the optical coupler as an input; and a second laser safety part for controlling said reflected light mask part based on the power of output light of said reflected light mask part and on the power of reflected light to said reflected light mask part.