(19)
(11) EP 1 005 707 A1

(12)

(43) Date of publication:
07.06.2000 Bulletin 2000/23

(21) Application number: 99930403.3

(22) Date of filing: 18.06.1999
(51) International Patent Classification (IPC)7H01S 3/00
(86) International application number:
PCT/US9913/812
(87) International publication number:
WO 9966/610 (23.12.1999 Gazette 1999/51)
(84) Designated Contracting States:
GB

(30) Priority: 19.06.1998 US 89967 P

(71) Applicant: LUCENT TECHNOLOGIES INC.
Murray Hill, New Jersey 07974-0636 (US)

(72) Inventors:
  • SRIVASTAVA, Atul, Kumar
    Eatontown, NJ 07724 (US)
  • SULHOF, James, William
    Ocean, NJ 07712 (US)
  • SUN, Yan
    Middletown, NJ 07748 (US)
  • WOLF, Charles, L.
    Ocean, NJ 07757 (US)
  • ZHOU, Jianhui
    Freehold, NJ 07728 (US)
  • ZYSKIND, John, Lehrer
    Hummelstown, PA 17036 (US)

(74) Representative: Johnston, Kenneth Graham 
Lucent Technologies (UK) Ltd,5 Mornington Road
Woodford GreenEssex, IG8 OTU
Woodford GreenEssex, IG8 OTU (GB)

   


(54) GAIN TILT CONTROL WITH MID-STAGE ATTENUATORS IN ERBIUM-DOPED FIBER AMPLIFIERS