Patent ID: 11874498
Assignee: QUANTINUUM LLC
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A method of fabricating a modulator, the method comprising:
depositing a first cladding layer on a substrate;
depositing a passive waveguide layer on the first cladding layer and patterning the passive waveguide layer to provide a passive waveguide extending a first length between a first passive end and a second passive end, a width of the passive waveguide substantially maintained along the first length;
depositing a second cladding layer on the passive waveguide and the first cladding layer so as to at least partially enclose the passive waveguide;
defining an active portion of an integrated passive/active modulator unit by bonding an active layer to a portion of the second cladding layer;
etching the active layer to form an active waveguide comprising at least one of an upstream taper or a downstream taper;
depositing and patterning electrical contacts in electrical communication with the active waveguide; and
coupling a beam combiner to the second passive end, the beam combiner configured to couple a first beam output by the second passive end with a second beam to cause interference of the first beam and the second beam.