US 11,870,553 B2
Fiber-optic communication apparatus, fiber-optic communication system, and optical power control method
Makoto Hasegawa, Sapporo (JP); Atsushi Kodama, Kawasaki (JP); Norifumi Shukunami, Yokohama (JP); and Tomoaki Takeyama, Yokohama (JP)
Assigned to FUJITSU LIMITED, Kawasaki (JP)
Filed by FUJITSU LIMITED, Kawasaki (JP)
Filed on Jul. 21, 2022, as Appl. No. 17/870,276.
Claims priority of application No. 2022-094096 (JP), filed on Jun. 10, 2022.
Prior Publication US 2022/0368447 A1, Nov. 17, 2022
Int. Cl. H04J 14/02 (2006.01); H04B 10/2507 (2013.01); G02B 6/42 (2006.01)
CPC H04J 14/0221 (2013.01) [G02B 6/4286 (2013.01); H04B 10/2507 (2013.01); H04J 14/0213 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A fiber-optic communication apparatus comprising:
an optical monitor that monitors a wavelength division multiplexed (WDM) signal in which optical signals of multiple channels are multiplexed;
a processor that calculates a control value for controlling an optical power of the WDM signal, based on a power spectrum detected by the optical monitor, in a unit interval of frequency narrower than a channel bandwidth of the WDM signal; and
an optical power adjusting mechanism that adjusts the optical power of the WDM signal in the unit interval of frequency based on the control value.