公开(公告)号：US20230314896A1

公开(公告)日：2023-10-05

申请号：US18128996

申请日：2023-03-30

Applicant: Marvell Asia Pte Ltd

Inventor： Hamed PISHVAIBAZARGANI ,  Jie LIN ,  Masaki KATO

IPC: G02F1/21 ,  G02F1/015 ,  G02F1/225

CPC classification number: G02F1/212 ,  G02F1/015 ,  G02F1/225

Abstract: An optical modulator includes a semiconductor substrate and an optical waveguide portion disposed on the semiconductor substrate. A signal contact that extends alongside the optical waveguide portion is disposed on the semiconductor substrate. A first ground line is disposed on the semiconductor substrate spaced away from the signal contact by a first spacing. A second ground line is disposed on the semiconductor substrate spaced away from the signal contact by a second spacing opposite the first ground line. The first spacing is different from the second spacing.

公开(公告)号：US20210364701A1

公开(公告)日：2021-11-25

申请号：US17397183

申请日：2021-08-09

Applicant: MARVELL ASIA PTE, LTD.

Inventor： Jie LIN ,  Masaki Kato

IPC: G02B6/27 ,  G02B6/126

Abstract: A silicon photonic device includes a silicon-on-insulator substrate, a waveguide, and a plate. The silicon-on-insulator substrate includes a silicon layer and a silicon dioxide layer. The waveguide is disposed on the silicon-on-insulator substrate. The silicon dioxide layer at least partially overlays the waveguide. The plate exhibits metallic characteristics and is at least partially embedded in the silicon dioxide layer of the silicon-on-insulator substrate. The plate is spaced apart from the waveguide and is configured to mitigate transverse magnetic emission propagating through the waveguide.

公开(公告)号：US20220413215A1

公开(公告)日：2022-12-29

申请号：US17901182

申请日：2022-09-01

Applicant: Marvell Asia Pte Ltd.

Inventor： Jie LIN ,  Masaki Kato ,  Bruno Tourette ,  Brian Taylor

IPC: G02B6/12 ,  H04B10/43 ,  H04B10/61

Abstract: A circuit for detecting an optical data signal includes a photonics substrate and first and second photodiodes formed in the photonics substrate. The first photodiode is configured to receive, via an input port formed in the photonics substrate, a first portion of the optical data signal and convert light power of the first portion of the optical data signal to generate a first current based on the optical data signal. The second photodiode is configured to output a second current without receiving any portion of the optical data signal. The second current corresponds to a dark current induced in the second photodiode. The circuit is configured to subtract the second current from the first current to generate an output signal corresponding to a power of the optical data signal without dark current induced in the first photodiode.

公开(公告)号：US20220317372A1

公开(公告)日：2022-10-06

申请号：US17218748

申请日：2021-03-31

Applicant: MARVELL ASIA PTE, LTD.

Inventor： Hong CAI ,  Jie LIN

IPC: G02B6/12 ,  G02B6/122 ,  G02B6/136

Abstract: A method for making a multimode interference (MMI) coupler with an arbitrary desired splitting ratio includes forming a thin-film of silicon-nitride material overlying a SOI substrate. The method further includes obtaining geometric parameters of a standard MIMI coupler including a rectangular MMI block and one input port and two output ports in taper shape with one of standard splitting ratios under self-imaging principle which is close to the desired splitting ratio. Additionally, the method includes tunning the input port to an off-center position at front edge of the MMI block. The method further includes making a first output port to a first off-center position flushing with a side edge of the MMI block, adjusting a second output port to a second off-center position. The method includes tunning the MMI block to obtain optimized geometric parameters for approaching the selected arbitrary splitting ratio, and etching the thin-film of silicon-nitride material.