EP 1509755 A2 20050302 - DEVICE AND METHOD FOR DETERMINING CHIRP OF A MACH-ZEHNDER TYPE ELECTRO-OPTICAL MODULATOR
Title (en)
DEVICE AND METHOD FOR DETERMINING CHIRP OF A MACH-ZEHNDER TYPE ELECTRO-OPTICAL MODULATOR
Title (de)
EINRICHTUNG UND VERFAHREN ZUR BESTIMMUNG DES CHIRPENS EINES ELEKTROOPTISCHEN MODULATORS DES MACH-ZEHNDER-TYPS
Title (fr)
DISPOSITIF ET PROCEDE DE DETERMINATION DU "CHIRP" D'UN MODULATEUR ELECTRO-OPTIQUE DU TYPE MACH-ZEHNDER
Publication
Application
Priority
- FR 0301332 W 20030428
- FR 0205393 A 20020429
Abstract (en)
[origin: WO03093777A2] The invention concerns a device and method for determining chirp of a Mach-Zender type interferometric electro-optical modulator by optical spectral analysis of a modulated optical signal, an optical signal of frequency OMEGA 0 produced by a source being modulated into an optical signal modulated by an electric signal, said electric signal comprising a periodic component of predetermined frequency OMEGA and a continuous polarizing component, the chirp weighting the amplitude of the lateral optical lines of modulation frequency-shifted by I OMEGA I relative to OMEGA 0. The invention is characterized in that the device comprises at least one means for optical measurement of at least one of the lateral lines and one controlling and calculating means, in a first measurement step, for sending a continuous component so that the optical phase difference PHI between the two arms is substantially null and, in a second measurement step, for sending a continuous component such that the optical phase difference PHI in absolute value between the two arms is substantially equal to pi , the calculating means enabling at least the calculation for a given lateral optical line frequency the ratio of the measurement I OMEGA I= pi over the measurement PHI =0, said ratio enabling the determination of the chirp. The invention also concerns a method for determining chirp.
IPC 1-7
IPC 8 full level
G01J 9/00 (2006.01); G02F 1/225 (2006.01)
CPC (source: EP)
G01J 9/00 (2013.01); G02F 1/225 (2013.01); G02F 2203/25 (2013.01)
Citation (search report)
See references of WO 03093777A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
FR 2839151 A1 20031031; FR 2839151 B1 20040723; AU 2003246867 A1 20031117; AU 2003246867 A8 20031117; EP 1509755 A2 20050302; WO 03093777 A2 20031113; WO 03093777 A3 20040401
DOCDB simple family (application)
FR 0205393 A 20020429; AU 2003246867 A 20030428; EP 03747468 A 20030428; FR 0301332 W 20030428