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公开(公告)号:US11906824B2
公开(公告)日:2024-02-20
申请号:US18177497
申请日:2023-03-02
Applicant: Cisco Technology, Inc.
Inventor: Xunyuan Zhang , Vipulkumar K. Patel , Prakash B. Gothoskar , Ming Gai Stanley Lo
IPC: G02F1/025
CPC classification number: G02F1/025 , G02F2202/104 , G02F2202/105
Abstract: Embodiments provide for an optical modulator, comprising: a lower guide, comprising: a lower hub, made of monocrystalline silicon; and a lower ridge, made of monocrystalline silicon that extends in a first direction from the lower hub; an upper guide, including: an upper hub; and an upper ridge, made of monocrystalline silicon that extends in a second direction, opposite of the first direction, from the upper hub and is aligned with the lower ridge; and a gate oxide layer separating the lower ridge from the upper ridge and defining a waveguide region with the lower guide and the upper guide.
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公开(公告)号:US11036069B2
公开(公告)日:2021-06-15
申请号:US16356982
申请日:2019-03-18
Applicant: Cisco Technology, Inc.
Inventor: Xunyuan Zhang , Vipulkumar K. Patel , Prakash B. Gothoskar , Ming Gai Stanley Lo
IPC: G02F1/025
Abstract: Embodiments provide for an optical modulator, comprising: a lower guide, comprising: a lower hub, made of monocrystalline silicon; and a lower ridge, made of monocrystalline silicon that extends in a first direction from the lower hub; an upper guide, including: an upper hub; and an upper ridge, made of monocrystalline silicon that extends in a second direction, opposite of the first direction, from the upper hub and is aligned with the lower ridge; and a gate oxide layer separating the lower ridge from the upper ridge and defining a waveguide region with the lower guide and the upper guide.
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公开(公告)号:US11619838B2
公开(公告)日:2023-04-04
申请号:US17302632
申请日:2021-05-07
Applicant: Cisco Technology, Inc.
Inventor: Xunyuan Zhang , Vipulkumar K. Patel , Prakash B. Gothoskar , Ming Gai Stanley Lo
IPC: G02F1/025
Abstract: Embodiments provide for an optical modulator, comprising: a lower guide, comprising: a lower hub, made of monocrystalline silicon; and a lower ridge, made of monocrystalline silicon that extends in a first direction from the lower hub; an upper guide, including: an upper hub; and an upper ridge, made of monocrystalline silicon that extends in a second direction, opposite of the first direction, from the upper hub and is aligned with the lower ridge; and a gate oxide layer separating the lower ridge from the upper ridge and defining a waveguide region with the lower guide and the upper guide.
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公开(公告)号:US11042050B1
公开(公告)日:2021-06-22
申请号:US16708248
申请日:2019-12-09
Applicant: Cisco Technology, Inc.
Inventor: Yi Ho Lee , Ming Gai Stanley Lo , Vipulkumar K. Patel , Prakash B. Gothoskar
Abstract: Embodiments herein describe reverse biasing one or more PIN junctions formed in at least one layer of a PSR. The resulting electric fields in the PIN junctions overlap with the optical path of the optical signal and sweep away photo-generated hole-electron free carriers away. That is, the electric fields in the PIN junctions remove the free carriers from the path of the optical signal and reduces the population of the free carriers, thereby mitigating the negative impact of free-carrier absorption (FCA).
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公开(公告)号:US11513375B2
公开(公告)日:2022-11-29
申请号:US16716139
申请日:2019-12-16
Applicant: Cisco Technology, Inc.
Inventor: Ming Gai Stanley Lo , Vipulkumar K. Patel , Mark A. Webster , Prakash B. Gothoskar
Abstract: A thermo-optic phase shifter comprises an optical waveguide comprising a P-type region comprising a first contact, an N-type region comprising a second contact, and a waveguide region disposed between the P-type region and the N-type region and having a raised portion. The thermo-optic phase shifter further comprises one or more heating elements. The one or more heating elements include one or more discrete resistive heating elements or the P-type and N-type regions driven as resistive heating elements.
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公开(公告)号:US10394059B1
公开(公告)日:2019-08-27
申请号:US16221300
申请日:2018-12-14
Applicant: Cisco Technology, Inc.
Inventor: Sean P. Anderson , Ming Gai Stanley Lo
Abstract: An optical apparatus comprises a first arm comprising a first optical waveguide configured to propagate a first optical signal, and a first thermo-optic (TO) phase shifter arranged proximate to the first optical waveguide. The optical apparatus further comprises a second arm comprising a second optical waveguide configured to propagate a second optical signal, and a second TO phase shifter arranged proximate to the second optical waveguide. The optical apparatus further comprises a thermal bridge arranged between the first TO phase shifter and the second TO phase shifter.
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