US 12,339,563 B1
Controlled chirp in optical devices
Christian Reimer, Wellesley, MA (US); and Mian Zhang, Cambridge, MA (US)
Assigned to HyperLight Corporation, Cambridge, MA (US)
Filed by HyperLight Corporation, Cambridge, MA (US)
Filed on Dec. 6, 2024, as Appl. No. 18/972,332.
Claims priority of provisional application 63/607,485, filed on Dec. 7, 2023.
Int. Cl. G02F 1/225 (2006.01); G02F 1/21 (2006.01)
CPC G02F 1/2255 (2013.01) [G02F 1/212 (2021.01); G02F 2203/25 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electro-optic device, comprising:
a first waveguide including a first thin film lithium-containing (TFLC) electro-optic material and being configured to carry a first optical signal;
a second waveguide including a second TFLC electro-optic material and being configured to carry a second optical signal; and
a plurality of electrodes including a first ground electrode, a first signal electrode, a second signal electrode, and a second ground electrode, the first signal electrode and the second signal electrode being between the first ground electrode and the second ground electrode, the first signal electrode and the second signal electrode forming a differential electrode pair proximate to a portion of the first waveguide and to a portion of the second waveguide;
wherein the differential electrode pair is configured to provide a first modulation to the first optical signal and a second modulation to the second optical signal, a first magnitude of the first modulation being different from a second magnitude of the second modulation such that the electro-optic device has an engineered chirp; and
wherein only the portion of the first waveguide or only the portion of the second waveguide is between the first signal electrode and the second signal electrode along an entire length of electro-optic modulation.