(19)
(11) EP 2 959 614 A1

(12)

(43) Date of publication:
30.12.2015 Bulletin 2015/53

(21) Application number: 14707583.2

(22) Date of filing: 17.02.2014
(51) International Patent Classification (IPC): 
H04B 10/079(2013.01)
H04B 10/54(2013.01)
(86) International application number:
PCT/US2014/016671
(87) International publication number:
WO 2014/130386 (28.08.2014 Gazette 2014/35)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 25.02.2013 US 201361769078 P
05.03.2013 US 201361772664 P
27.06.2013 US 201313929757
20.09.2013 US 201314032886

(71) Applicant: Alcatel Lucent
92100 Boulogne-Billancourt (FR)

(72) Inventors:
  • XIE, Chongjin
    Holmdel, NJ 07733 (US)
  • DONG, Po
    Holmdel, NJ 07733 (US)
  • WINZER, Peter
    Holmdel, NJ 07733 (US)

(74) Representative: Colombo, Stefano Paolo et al
Marchi & Partners S.r.l. Via Vittor Pisani, 13
20124 Milano
20124 Milano (IT)

   


(54) LEVEL SPACING FOR M-PAM OPTICAL SYSTEMS WITH COHERENT DETECTION