Linearized modulator
AssigneeRockley Photonics Limited
InventorsAdam Scofield, Thomas Pierre Schrans, Aaron John Zilkie
Life of this patent
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Abstract
An electro-optical modulator. The electro-optical modulator comprising: an input waveguide, configured to guide light into a modulation region of the electro-optical modulator; a plurality of sub-modulators, within the modulation region, each sub-modulator having a transfer function between an applied voltage and an optical phase shift; and an output waveguide, configured to guide light out of the modulation region. The combination of the transfer functions of each sub-modulator is such that a total transfer function between an applied voltage and an optical phase shift of the modulation region is substantially linear over a range of operating voltages.
Claims20
An electro-optical modulator, comprising:
- an input waveguide, configured to guide light into a modulation region of the electro-optical modulator;
- a plurality of sub-modulators, within the modulation region, each sub-modulator having a transfer function between an applied voltage and an optical phase shift;
- and
- an output waveguide, configured to guide light out of the modulation region,
- wherein a combination of the transfer functions of each sub-modulator is such that a total transfer function between an applied voltage and an optical phase shift of the modulation region is substantially linear over a range of operating voltages, and
- wherein a first transfer function, of a first sub-modulator of the plurality of sub-modulators, is different from a second transfer function, of a second sub-modulator of the plurality of sub-modulators.
Dependencies are inferred from the claim text.