EP 0966807 A1 19991229 - METHOD FOR CONVERTING OPTICAL MULTIPLEX SYSTEM CHANNEL SIGNAL MODULATION INTO SUBCARRIER FREQUENCIES
Title (en)
METHOD FOR CONVERTING OPTICAL MULTIPLEX SYSTEM CHANNEL SIGNAL MODULATION INTO SUBCARRIER FREQUENCIES
Title (de)
VERFAHREN ZUR UMSETZUNG DER SIGNALMODULATION DER KANÄLE EINES OPTISCHEN MULTIPLEX-SYSTEMS AUF SUBCARRIERFREQUENZEN
Title (fr)
PROCEDE DE CONVERSION DE LA MODULATION DE SIGNAL DES CANAUX D'UN SYSTEME MULTIPLEX OPTIQUE A DES FREQUENCES DE SOUS-PORTEUSE
Publication
Application
Priority
- DE 9800709 W 19980311
- DE 19710033 A 19970312
Abstract (en)
[origin: DE19710033C1] According to the invention, several laser diodes (1) or other suitable optical sources of varying emission wavelengths ( lambda k) are impressed with various useful signals in the base band or in the intermediate frequency range and the wavelength channels (xk) thus formed are brought together. An external high threshold frequency modulator (4) is included the wavelength multiplex system. Said modulator is controlled according to the desired microwave or millimeter wave subcarrier frequency (fsub) or subharmonic thereof so that modulation of all wavelength channels (xk) is converted upwards. The individual wavelength channels (xk) are wavelength selectably outcoupled to photodiodes (8) or other direct receivers which deliver the selected modulated useful signal to the subcarrier (Pn,sub).
IPC 1-7
IPC 8 full level
H04B 10/61 (2013.01); H03D 9/00 (2006.01); H04B 10/2507 (2013.01); H04B 10/516 (2013.01); H04B 10/54 (2013.01); H04B 10/548 (2013.01); H04B 10/572 (2013.01); H04B 10/588 (2013.01); H04J 14/00 (2006.01); H04J 14/02 (2006.01)
CPC (source: EP US)
H03D 9/00 (2013.01 - EP US); H04J 14/0298 (2013.01 - EP US)
Citation (search report)
See references of WO 9840981A1
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
DE 19710033 C1 19980423; EP 0966807 A1 19991229; JP 2001514814 A 20010911; US 6559986 B1 20030506; WO 9840981 A1 19980917
DOCDB simple family (application)
DE 19710033 A 19970312; DE 9800709 W 19980311; EP 98921351 A 19980311; JP 53908698 A 19980311; US 39531499 A 19990913