Patent ID: 6078413
Filing Date: 2000-06-20
Classification: H04B,H04J

Abstract:
An optical branching/multiplexing apparatus comprising:an optical branching device for causing an optical signal of a specific wavelength in wavelength division multiplexed optical signals to be subjected to optical-branching and for causing an optical signal of another wavelength with the exception of said specific wavelength to penetrate;an optical amplifier for amplifying a multiplexed input signal in accordance with laser light;an optical multiplexing device for multiplexing an optical signal penetrated through said optical branching device and an optical signal amplified by said optical amplifier;comparison means for comparing quantity of light between an optical signal penetrated through said optical branching device and an optical signal amplified by said optical amplifier; andquantity of light control means for controlling amplification degree of said optical amplifier such that quantity of light of an optical signal amplified by said optical amplifier agrees with an optical signal penetrated through said optical branching device.