公开(公告)号：US10852570B1

公开(公告)日：2020-12-01

申请号：US16655090

申请日：2019-10-16

Applicant: INPHI CORPORATION

Inventor： Xiaoguang Tu ,  Masaki Kato

IPC: G02F1/025 ,  G02F1/225 ,  G02F1/015 ,  G02F1/21

Abstract: A silicon optical modulator is fabricated to have a multi-slab structure between the contacts and the waveguide, imparting desirable performance attributes. A first slab comprises dopant of a first level. A second slab adjacent to (e.g., on top of) the first slab, comprises a doped region proximate to a contact, and an intrinsic region proximate to the waveguide. The parallel resistance properties and low overlap between the highly doped silicon and optical mode pigtail afforded by the multi-slab configuration, allow the modulator to operate with reduced optical losses and at a high speed. Embodiments may be implemented in a Mach-Zehnder interferometer or in micro-ring resonator modulator configuration.

公开(公告)号：US11086189B1

公开(公告)日：2021-08-10

申请号：US16739973

申请日：2020-01-10

Applicant: INPHI CORPORATION

Inventor： Xiaoguang Tu ,  Jie Lin ,  Masaki Kato

IPC: G02F1/225 ,  G02F1/21 ,  G02B6/134

Abstract: A silicon optical modulator includes two silicon waveguide branches coupled between a 2×2 splitter at a common input end and a 2×2 splitter at a common output end. The modulator further includes at least one of the two silicon waveguide branches comprising a ridge-shape having a central portion of a height sandwiched in a width direction by a first side portion and a second side portion throughout a length of the waveguide. The central portion in each cross-section plane thereof includes a p-region and a n-region separated by a continuous borderline to form an irregular shaped PN junction. The borderline is configured to have at least one section-line with a sloped angle relative to the width direction and have a total border-length substantially longer than the height. The p-region is in contact with the first side portion and the n-region is in contact with the second side portion.

公开(公告)号：US11002913B2

公开(公告)日：2021-05-11

申请号：US16835093

申请日：2020-03-30

Applicant: INPHI CORPORATION

Inventor： Xiaoguang Tu ,  Radhakrishnan L. Nagarajan ,  Masaki Kato

IPC: G02B6/293 ,  G02B6/122 ,  G02B6/30 ,  G02B6/02 ,  H04B10/2513 ,  G02B6/12

Abstract: An optical dispersion compensator integrated with a silicon photonics system including a first phase-shifter coupled to a second phase-shifter in parallel on the silicon substrate characterized in an athermal condition. The dispersion compensator further includes a third phase-shifter on the silicon substrate to the first phase-shifter and the second phase-shifter through two 2×2 splitters to form an optical loop. A second entry port of a first 2×2 splitter is for coupling with an input fiber and a second exit port of a second 2×2 splitter is for coupling with an output fiber. The optical loop is characterized by a total phase delay tunable via each of the first phase-shifter, the second phase-shifter, and the third phase-shifter such that a normal dispersion (>0) at a certain wavelength in the input fiber is substantially compensated and independent of temperature.

公开(公告)号：US10527795B2

公开(公告)日：2020-01-07

申请号：US16157409

申请日：2018-10-11

Applicant: INPHI CORPORATION

Inventor： Xiaoguang Tu ,  Radhakrishnan L. Nagarajan ,  Masaki Kato

IPC: G02B6/293 ,  G02B6/122 ,  G02B6/30 ,  G02B6/02 ,  H04B10/2513 ,  G02B6/12

Abstract: An optical dispersion compensator integrated with a silicon photonics system including a first phase-shifter coupled to a second phase-shifter in parallel on the silicon substrate characterized in an athermal condition. The dispersion compensator further includes a third phase-shifter on the silicon substrate to the first phase-shifter and the second phase-shifter through two 2×2 splitters to form an optical loop. A second entry port of a first 2×2 splitter is for coupling with an input fiber and a second exit port of a second 2×2 splitter is for coupling with an output fiber. The optical loop is characterized by a total phase delay tunable via each of the first phase-shifter, the second phase-shifter, and the third phase-shifter such that a normal dispersion (>0) at a certain wavelength in the input fiber is substantially compensated and independent of temperature.

公开(公告)号：US10126629B1

公开(公告)日：2018-11-13

申请号：US15668584

申请日：2017-08-03

Applicant: INPHI CORPORATION

Inventor： Xiaoguang Tu ,  Radhakrishnan L. Nagarajan ,  Masaki Kato

IPC: G02F1/225 ,  G02B6/293 ,  G02F1/21

Abstract: An optical dispersion compensator integrated with a silicon photonics system including a first phase-shifter coupled to a second phase-shifter in parallel on the silicon substrate characterized in an athermal condition. The dispersion compensator further includes a third phase-shifter on the silicon substrate to the first phase-shifter and the second phase-shifter through two 2×2 splitters to form an optical loop. A second entry port of a first 2×2 splitter is for coupling with an input fiber and a second exit port of a second 2×2 splitter is for coupling with an output fiber. The optical loop is characterized by a total phase delay tunable via each of the first phase-shifter, the second phase-shifter, and the third phase-shifter such that a normal dispersion (>0) at a certain wavelength in the input fiber is substantially compensated and independent of temperature.