EP 1573869 A1 20050914 - MULTIPLE STAGE RAMAN OPTICAL AMPLIFIER
Title (en)
MULTIPLE STAGE RAMAN OPTICAL AMPLIFIER
Title (de)
MEHRSTUFIGER RAMAN-VERSTÄRKER
Title (fr)
AMPLIFICATEUR OPTIQUE RAMAN A ETAGES MULTIPLES
Publication
Application
Priority
EP 0214532 W 20021219
Abstract (en)
[origin: WO2004057712A1] The invention relates to a multiple stage Raman amplifier including an interstage wavelength-selective pump combiner. Wavelength-selection characteristics are such that the pump combiner substantially blocks the passage of the pump signal of the first stage to the second stage and/or vice versa while allowing the passage of the transmission signal from the first stage to the second stage. The pump combiner substantially blocks different portions of the wavelength spectrum of the pump radiation which is fed into the pump combiner from different ports. The pump combiner preferably includes thin-film filters. The pump combiner has therefore the multiple function of coupling the pump signal of the first (or second) pump source and of isolating from one another the pump signals of the two amplification stages. This allows the reduction of the number of passive components present in a multistage optical amplifier, which in turn leads to a decrease of the overall insertion loss in the amplifier and shorter assembly processing.
IPC 1-7
IPC 8 full level
G02B 6/34 (2006.01); H01S 3/30 (2006.01); H04B 10/291 (2013.01); H01S 3/067 (2006.01); H01S 3/094 (2006.01)
CPC (source: EP)
G02B 6/29361 (2013.01); G02B 6/4246 (2013.01); H01S 3/302 (2013.01); H04B 10/2916 (2013.01); H01S 3/06758 (2013.01); H01S 3/094003 (2013.01); H01S 3/094096 (2013.01); H01S 2301/04 (2013.01); H04B 2210/003 (2013.01)
Citation (search report)
See references of WO 2004057712A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR
DOCDB simple family (publication)
WO 2004057712 A1 20040708; AU 2002368474 A1 20040714; EP 1573869 A1 20050914
DOCDB simple family (application)
EP 0214532 W 20021219; AU 2002368474 A 20021219; EP 02808262 A 20021219