Hoffmann, DetlefDetlefHoffmann2022-03-082022-03-082015https://publica.fraunhofer.de/handle/publica/310735The invention relates to an electro-optic Mach-Zehnder modulator, comprising a first and a second optical branch (11, 11', 12, 12'); a first alternating voltage electrode arrangement (112, 112') for applying an alternating voltage across the first optical branch (11, 11'); a second alternating voltage electrode arrangement (122, 122') for applying an alternating voltage across the second optical branch (12, 12'); a first control electrode arrangement (114, 114') separate from the first alternating voltage electrode arrangement (112, 112') and for supplying a DC voltage across the first optical branch (11, 11'); a second control electrode arrangement (124, 124') separate from the second alternating voltage electrode arrangement (122, 122') and for supplying a DC voltage across the second optical branch (12, 12'), wherein the first control electrode arrangement (114, 114') and/or the second control electrode arrangement (124, 124') comprises a first control electrode (115, 115', 125, 125') and a second control electrode (116, 116', 126, 126'). According to the invention, the length of the first control electrode (115, 115', 125, 125') is different from the length of the second control electrode (116, 116', 126, 126'). The invention also relates to a method for operating a Mach-Zehnder modulator.en621patentWO2014EP573