Electro-optic modulator with enhanced bias stability

Details Electro-optic modulator with enhanced bias stability Electro-optic modulator with enhanced bias stability

G - Physics

02

F

G02F 1/035 (2006.01) G02F 1/225 (2006.01)

Patent

CA 2339509

A co-planar waveguide interferometric electro-optic modulator that reduces the bias point sensitivity of the modulator to ambient temperature and to applied RF is described. The modulator includes a first and second waveguide that are formed in an electro- optic substrate. A RF electrode is positioned on the electro-optic substrate between the first and the second waveguide. A ground electrode that may include a slot is positioned proximate to the second waveguide. A guard ground electrode is positioned proximate to the first waveguide to sink heat from the RF electrode and may also balance the thermal stress in the two waveguides. A dielectric material may also be positioned proximate to the first waveguide to balance the thermal stress in the two waveguides.

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