Directional coupler and mach-zehnder modulator using such...

Details Directional coupler and mach-zehnder modulator using such... Directional coupler and mach-zehnder modulator using such...

G - Physics

02

F

G02F 1/03 (2006.01) G02B 6/35 (2006.01) G02F 1/225 (2006.01) H04B 10/02 (2006.01) H04B 10/12 (2006.01) H04N 7/22 (2006.01)

Patent

CA 2300568

A dual output electro-optical modulator (100) for modulating an optical signal by an electrical signal (285), comprising a Mach-Zehnder interferometer with an input path (102), two arms (103, 104) and a directional coupler (105), wherein the directional coupler comprise, two waveguides on a planar substrate (101) defining two inputs, two outputs anal a coupling region between the inputs and the outputs where the waveguides are in close proximity to each other so as to cause coupling between them. The coupling region of the directional coupler comprises a strong coupling region and in that the length of parallel sections of optical waveguides in the coupling region is less than 35% of the length of the strong coupling region.

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