Patent ID: 7369714

Claim:
An opto-electronic modulator: a Mach-Zehnder structure that comprises Si-based p + in + -diodes in both arms of the Mach-Zehnder structure, said Mach-Zebnder structure is formed by Si-waveguides so as to confine an optical mode in the opto-electronic modulator, said Si-based p + in + -diodes are biased in series and a static current is driven through both arms leading to both equal phase shifts, absorption, and heating in said both arms ensuring that thermo-optics effects due to a bias current in said both arms are balanced; and a coplanar transmission line providing a RF-signal that is capacitively-coupled to said Si-based p + in + -diodes and said RF signal being out of phase via the even mode of said coplanar transmission line.