Technique for dynamically controlling the incoupler of a beam-steering device
First Claim
1. An optical system comprising:
- a beam-steering (BS) device comprising a planar waveguide region between a tapered incoupler and tapered outcoupler that respectively define opposing incoupler and outcoupler facets of the BS device, wherein each of the waveguide region, the incoupler, and the outcoupler comprises;
a substrate;
a subcladding layer over the substrate;
a core layer over the subcladding layer; and
a top cladding layer, wherein, within the incoupler, at least one of the subcladding layer and the top cladding layer comprises a material having a refractive index that varies with an applied field applied at the incoupler;
a field-applying device configured to apply the applied field at the incoupler;
an output detector configured to generate a feedback signal based on detected outgoing light output from the outcoupler; and
a controller configured to control the field-applying device based on the feedback signal to alter the outgoing light output from the outcoupler.
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Abstract
An optical system has a beam-steering device having a planar waveguide region between a tapered incoupler and a tapered outcoupler that respectively define opposing incoupler and outcoupler facets of the BS device. Each region has a substrate, a subcladding layer over the substrate, a core layer over the subcladding, and a top cladding layer over the core. Within the incoupler, at least one of the subcladding and the top cladding has a material having a refractive index that varies with an applied field (e.g., an electric field) applied at the incoupler. The optical system also has a field-applying device that applies the applied field at the incoupler, an output detector that generates a feedback signal based on detected outgoing light output from the outcoupler, and a controller that controls the field-applying device based on the feedback signal to alter the light output from the outcoupler.
8 Citations
18 Claims
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1. An optical system comprising:
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a beam-steering (BS) device comprising a planar waveguide region between a tapered incoupler and tapered outcoupler that respectively define opposing incoupler and outcoupler facets of the BS device, wherein each of the waveguide region, the incoupler, and the outcoupler comprises; a substrate; a subcladding layer over the substrate; a core layer over the subcladding layer; and a top cladding layer, wherein, within the incoupler, at least one of the subcladding layer and the top cladding layer comprises a material having a refractive index that varies with an applied field applied at the incoupler; a field-applying device configured to apply the applied field at the incoupler; an output detector configured to generate a feedback signal based on detected outgoing light output from the outcoupler; and a controller configured to control the field-applying device based on the feedback signal to alter the outgoing light output from the outcoupler. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification