公开(公告)号：EP4535053A1

公开(公告)日：2025-04-09

申请号：EP24168618.7

申请日：2024-04-05

Applicant: GlobalFoundries U.S. Inc.

Inventor： Dash, Aneesh ,  Rakowski, Michal ,  Chatterjee, Avijit ,  Minasamudram, Rupa Gopinath

IPC: G02B6/293 ,  G02F1/225

Abstract: Structures (10) for an optical switch and methods of forming such structures. The structure (10) comprises a first waveguide core (14) including a first portion and a second portion, a second waveguide core (12) including a first portion and a second portion, a ring resonator (18) having a first portion adjacent to the first portion of the first waveguide core (14) and a second portion adjacent to the first portion of the second waveguide core (12), and an optical coupler (20) coupled to the second portion of first waveguide core (14) and the second portion of the second waveguide core (12). The first portion of the ring resonator (18) is spaced from the first portion of the first waveguide core (14) by a first gap over a first light coupling region, and the second portion of the ring resonator (18) is spaced from the first portion of the second waveguide core (12) by a second gap over a second light coupling region.

公开(公告)号：EP4456451A1

公开(公告)日：2024-10-30

申请号：EP23205101.1

申请日：2023-10-23

Applicant: GlobalFoundries U.S. Inc.

Inventor： Sharma, Prateek Kumar ,  Chatterjee, Avijit ,  Nandi, Riddhi ,  Minasamudram, Rupa Gopinath

IPC: H04B10/69

Abstract: Disclosed are a multi-photodetector circuit and an optical receiver incorporating the circuit. The circuit includes parallel-connected photodiodes. In some embodiments, photodiodes are connected, in a same direction, between a positive power supply line and an output line. They receive equal power optical signals or a series of 1:2 optical dividers is employed so each photodiode receives a progressively lower power signal until the last two photodiodes, which receive equal power optical signals. In other embodiments, first photodiodes are connected, in one direction, between a positive power supply line and an output line and second photodiodes are connected, in an opposite direction, between a negative power supply line and the output line. First photodiodes receive equal power optical signals from an optical divider in response to an optical input signal and second photodiodes receive equal power optical signals from another optical divider in response to an inverted optical input signal.