Patent ID: 6535309
Filing Date: 2003-03-18
Classification: G02B,H04J

Abstract:
An optical multiplexing/demultiplexing apparatus comprising:a branching/inserting unit connected to a transmission path where a wavelength division multiplexed signal light is transmitted, and being capable of branching as a branch light, a signal light of at least one wavelength from a signal light transmitted on said transmission path and being capable of inserting as an insertion light, a signal light of at least one wavelength into the signal light transmitted on said transmission path; and an insertion-light power control unit to control an optical power of the insertion light based on an optical power of the branch light branched by said branching/inserting unit, so that the optical power of the insertion light inserted by said branching/inserting unit is substantially equal to the optical power of the branch light branched by said branching/inserting unit.