公开(公告)号：US12283996B1

公开(公告)日：2025-04-22

申请号：US18098764

申请日：2023-01-19

Applicant: Cisco Technology, Inc.

Inventor： Hongbin Zhang ,  Sheng Zhang ,  Tymon Barwicz

IPC: H04B10/588

Abstract: A method, system and apparatus for mapping a symbol from a N-QAM constellation into a binary bit set, where N is the number of symbols in the constellation, and reducing the length of the binary bit set according to at least one property of nonlinear distortion by generating a lookup table (LUT) address from a LUT address generator, and adding the LUT address to a LUT of size smaller than N{circumflex over ( )}(2M+1), where 2M is the number of neighboring symbols to be stored.

公开(公告)号：US20240126010A1

公开(公告)日：2024-04-18

申请号：US17965568

申请日：2022-10-13

Applicant: Cisco Technology, Inc.

Inventor： Tymon Barwicz

IPC: G02B6/12

CPC classification number: G02B6/12007 ,  G02B6/12004 ,  G02B2006/12097 ,  H01S5/026

Abstract: In part, the disclosure relates to an optical coupler. The optical coupler may include two ridge waveguides that include a first waveguide and a second waveguide. One or more segments of the two waveguides extend over a coupling length or other distance. One or more sections of each ridge waveguide is at least partially defined by a set of cross-sectional profiles, a plurality of sections of each ridge waveguide have a width that tapers along a length of the two ridge waveguides. Within the coupling length, a subset of the set of cross-sectional profiles may define a first pair of transition regions and a second pair of transition regions. The coupler may include a coupling region between the two ridge waveguides and spanning at least a section of the coupling length.

公开(公告)号：US20240094467A1

公开(公告)日：2024-03-21

申请号：US17946656

申请日：2022-09-16

Applicant: Cisco Technology, Inc.

Inventor： Tymon Barwicz

IPC: G02B6/125 ,  G02B6/122 ,  G02B6/136

CPC classification number: G02B6/125 ,  G02B6/1228 ,  G02B6/136 ,  G02B2006/12097

Abstract: In part, the disclosure relates to a photonic device that may include a curved waveguide that includes a plurality of layers; a curved elongate structure defining an upper surface, an inner elongate surface, and an outer elongate surface, the curved elongate structure comprising a first end, and a second end; and a ridge extending from the upper surface, the ridge having a first side and a second side; and a trench defined by one or more of the plurality of layers and the first side; the curved elongate structure defines a first elongate section and a second elongate section, wherein a first cross-section of the ridge has a first shape that substantially extends along the first elongate section of the structure, the first shape is defined by the first side and a step extending from the first side and above the bottom of the trench.