EP 1488548 A2 20041222 - COMMUNICATION SYSTEM AND SPLIT-BAND AMPLIFYING APPARATUS USING A DEPRESSED-PROFILE FIBER AMPLIFIER
Title (en)
COMMUNICATION SYSTEM AND SPLIT-BAND AMPLIFYING APPARATUS USING A DEPRESSED-PROFILE FIBER AMPLIFIER
Title (de)
KOMMUNIKATIONSSYSTEM UND BANDAUFGETEILTE VERSTÄRKUNGSVORRICHTUNG MIT EINEM FASERVERSTÄRKER MIT GEDRÜCKTEM PROFIL
Title (fr)
SYSTEME DE COMMUNICATION ET APPAREIL D'AMPLIFICATION A BANDE DIVISEE METTANT EN OEUVRE UN AMPLIFICATEUR A FIBRE A PROFIL DEPRIME
Publication
Application
Priority
- US 0306967 W 20030307
- US 9530302 A 20020308
- US 18656102 A 20020628
- US 34696003 A 20030117
Abstract (en)
[origin: WO03076979A2] An optical communication system (200) and a split-band amplifying apparatus (212) that amplifies optical signals whose short wavelength band includes at least a portion of the S-band and whose long wavelength band includes at least a portion of the C- and/or L-band. The amplifying apparatus (212) has a first (212A) and second section (212B) for respectively amplifying the long and short wavelength bands. The second section (212B) comprises a short-pass fiber (10) with a core (12) doped with an active material (18) such as Erbium. A pump source pumps the Erbium to a level of high relative inversion D such that the Erbium exhibits positive gains in the S-band and high gains in a long wavelength band longer than the S-band, i.e., in the C- and L-Bands. The core (12) is surrounded by a depressed cladding (14), which is surrounded by a secondary cladding (16). The core (12) has a core cross-section and a refractive index no, the depressed cladding (14) has a depressed cladding cross-section and a refractive index n1, and the secondary cladding (16) has a secondary cladding cross-section and a refractive index n2. The core cross-section, the depressed cladding cross-section and the refractive indices n0, n1, and n2 are selected to obtain losses at least comparable to the high gains in the long wavelength band and losses substantially smaller than the positive gains in the S-band. The fiber amplifier functions as a pre-amplifier, a power-boosting amplifier or an in-line amplifier in the optical communication system.
IPC 1-7
IPC 8 full level
G02B 6/028 (2006.01); H01S 3/00 (2006.01); G02B 6/036 (2006.01); H01S 3/067 (2006.01); H01S 3/10 (2006.01); H01S 3/23 (2006.01); H04B 10/29 (2013.01); H04B 10/291 (2013.01); H04J 14/00 (2006.01); H04J 14/02 (2006.01)
CPC (source: EP)
H01S 3/06758 (2013.01); H01S 3/2375 (2013.01); H01S 3/06716 (2013.01); H01S 3/0672 (2013.01); H01S 3/06729 (2013.01); H01S 3/06766 (2013.01); H01S 3/0677 (2013.01); H01S 3/06775 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 03076979 A2 20030918; WO 03076979 A3 20040205; WO 03076979 A9 20040304; AU 2003217978 A1 20030922; AU 2003217978 A8 20030922; CA 2478416 A1 20030918; CN 1327221 C 20070718; CN 1638630 A 20050713; EP 1488548 A2 20041222; EP 1488548 A4 20091111; JP 2005520323 A 20050707
DOCDB simple family (application)
US 0306967 W 20030307; AU 2003217978 A 20030307; CA 2478416 A 20030307; CN 03805598 A 20030307; EP 03713955 A 20030307; JP 2003575148 A 20030307