US 9,813,160 B2
Method of equalizing an optical transmission signal
Annalisa Morea, Vimercate (IT); Jeremie Renaudier, Nozay (FR); and Amirhossein Ghazisaeidi, Nozay (FR)
Assigned to Alcatel Lucent, Boulogne-Billancourt (FR)
Appl. No. 15/127,806
Filed by Alcatel Lucent, Boulogne Billancourt (FR)
PCT Filed Feb. 3, 2015, PCT No. PCT/EP2015/052134
§ 371(c)(1), (2) Date Sep. 21, 2016,
PCT Pub. No. WO2015/144346, PCT Pub. Date Oct. 1, 2015.
Claims priority of application No. 14305452 (EP), filed on Mar. 28, 2014.
Prior Publication US 2017/0117967 A1, Apr. 27, 2017
Int. Cl. H04B 10/294 (2013.01); H04J 14/02 (2006.01); H04B 10/2507 (2013.01)
CPC H04B 10/2941 (2013.01) [H04B 10/2507 (2013.01); H04J 14/0221 (2013.01); H04J 14/0298 (2013.01)] 8 Claims
OG exemplary drawing
 
1. Method of equalizing an optical transmission signal,
wherein said optical transmission signal (SUCH) has an overall bandwidth formed on a number of adjacent spectral slots,
wherein said optical transmission signal (SUCH) comprises a set of non-overlapping subcarrier signals (SC1, SC2, SC3, SC4),
wherein a distribution of said subcarrier signals (SC1, SC2, SC3, SC4) onto said spectral slots is such, that at least one spectral slot (S4, S6, S8) is occupied by more than one subcarrier signal,
comprising, at a network node (ON),
receiving said optical transmission signal,
amplifying said optical transmission signal,
measuring for the subcarrier signals respective power levels,
providing distribution data indicating said distribution of said subcarrier signals onto said spectral slots,
providing power level data indicating for said spectral slots respective desired power levels,
deriving for said spectral slots respective attenuation values, using the measured power levels, said distribution data and said power level data,
attenuating said optical transmission signal within said spectral slots individually, using the derived attenuation values.