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US 12,474,603 B2Granted
Low-loss waveguiding structures, in particular modulators
AssigneeHyperLight Corporation
InventorsMian Zhang, Christian Reimer, Kevin Luke
Life of this patent
Estimating the term…
Abstract
An optical modulator that uses adiabatic tapers to change the width of the waveguides between multimode waveguides and single mode waveguides on a low-loss, e.g. thin-film lithium niobate, electro-optic platform. The architecture enables the utilization of the fundamental mode of multimode wide optical waveguides that have lower optical propagation loss without sacrificing the benefit of the signal integrity and ease of control of single mode operation.
Claims13
An optical modulator comprising:
- a first active region supporting a first set of modes of an optical signal;
- a first transitional region converting the first set of modes to a second set of modes of the optical signal, the second set of modes being different from the first set of modes;
- a splitter, optically coupled with the first transitional region, configured to split the optical signal into a first sub-beam and a second sub-beam;
- and
- a second waveguide arm coupled to the splitter for transmitting the second sub-beam;
- wherein at least a portion of the first active region is configured to provide modulation of the optical signal, the first active region and the first transitional region including lithium.
3 more elements
An optical modulator comprising:
- a first active region supporting a first set of modes of an optical signal;
- a first transitional region converting the first set of modes to a second set of modes of the optical signal, the second set of modes being different from the first set of modes;
- a routing region that reroutes the second set of modes back towards the first active region and into a second active region that is aligned with the first active region;
- a second transitional region converting the second set of modes to a third set of modes of the optical signal, the third set of modes being different from the second set of modes;
- wherein the second active region supports the third set of modes of the optical signal;
- and
- wherein at least a portion of the first active region is configured to provide modulation of the optical signal, the first active region and the first transitional region including lithium.
4 more elements
An optical modulator comprising:
- a first active region supporting a first set of modes of an optical signal;
- a first transitional region converting the first set of modes to a second set of modes of the optical signal, the second set of modes being different from the first set of modes;
- wherein at least a portion of the first active region is configured to provide modulation of the optical signal, the first active region and the first transitional region including lithium;
- and
- wherein the second set of modes includes more modes than the first set of modes.
2 more elements
An optical modulator comprising:
- a first active region supporting a first set of modes of an optical signal;
- a first transitional region converting the first set of modes to a second set of modes of the optical signal, the second set of modes being different from the first set of modes;
- wherein at least a portion of the first active region is configured to provide modulation of the optical signal, the first active region and the first transitional region including lithium;
- and
- wherein the first active region has a cross sectional area<3 μm2.
2 more elements
An optical modulator comprising:
- a first active region supporting a first set of modes of an optical signal;
- a first transitional region converting the first set of modes to a second set of modes of the optical signal, the second set of modes being different from the first set of modes;
- wherein at least a portion of the first active region is configured to provide modulation of the optical signal, the first active region and the first transitional region including lithium;
- and
- where the first active region has a cross sectional area>0.2 μm2 and >10 μm2.
2 more elements
An optical modulator comprising:
- a first active region supporting a first set of modes of an optical signal;
- a first transitional region converting the first set of modes to a second set of modes of the optical signal, the second set of modes being different from the first set of modes;
- wherein at least a portion of the first active region is configured to provide modulation of the optical signal, the first active region and the first transitional region including lithium;
- and
- wherein the first transitional region includes an adiabatic taper.
2 more elements
Dependencies are inferred from the claim text.