Patent ID: 6570703
Filing Date: 2003-05-27
Classification: H01S,H04B,H04J

Abstract:
An optical amplifying apparatus for amplifying input light so that an optical power of output light has a predetermined fixed value, comprising:a correction section for correcting said predetermined fixed value by a correction amount according to an optical power of amplified spontaneous emission when the optical power of the amplified spontaneous emission included in said input light has different values in different wavelength bands from each other, wherein said input light is repeatedly transmitted while being amplified by optical amplifiers for amplifying light, and is a wavelength-division multiplexed optical signal in which an optical signal corresponding to a predetermined channel is dropped/added during the repeated transmissions; and said correction amount is computed based on: accumulated ASE information dk as an optical power of said amplified spontaneous emission being accumulated to said input light; an input channel number mk as a number of channels of said wavelength-division multiplexed optical signal as said input light; a total input power PTink as a total optical power of said input light; a dropped channel number n as a number of channels of said wavelength-division multiplexed optical signal to be dropped during transmission; an ASE rejected band &Dgr;fch. as a bandwidth of said amplified spontaneous emission to be rejected corresponding to a drop of one channel; a noise figure NFk; and an amplification band &Dgr;f.