公开(公告)号：US20200257050A1

公开(公告)日：2020-08-13

申请号：US16835093

申请日：2020-03-30

Applicant: INPHI CORPORATION

Inventor： Xiaoguang TU ,  Radhakrishnan L. NAGARAJAN ,  Masaki KATO

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

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：US20210231866A1

公开(公告)日：2021-07-29

申请号：US16776362

申请日：2020-01-29

Applicant: INPHI CORPORATION

Inventor： Xiaoguang TU ,  Masaki KATO ,  Yu LI

IPC: G02B6/12 ,  G02B6/14 ,  G02B6/13

Abstract: A silicon photonics integration circuit includes a silicon substrate member; a RX sub-circuit formed in the silicon substrate member including multiple RX-input ports each having a mode size converter configured to receive an incoming light signal into one of multiple waveguides and multiple RX photo detectors coupled respectively to the multiple waveguides; and a TX sub-circuit formed in the silicon substrate member including one or more TX-input ports each having a mode size converter coupled to a first TX photo detector into one input waveguide, one or more 1×2 directional couplers each coupled between the input waveguide and two mod-input waveguides, multiple modulators coupled between respective multiple mod-input waveguides and multiple mod-output waveguides each being coupled to a second TX photo detector into one of multiple output waveguides, and multiple TX-output ports each having a mode size converter coupled to respective one of the multiple output waveguides.

公开(公告)号：US20190041580A1

公开(公告)日：2019-02-07

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 ,  G02B6/02 ,  G02B6/30

CPC classification number: G02B6/29394 ,  G02B6/021 ,  G02B6/1225 ,  G02B6/29395 ,  G02B6/30 ,  G02B2006/12061 ,  G02B2006/1215 ,  G02B2006/12159 ,  H04B10/25133

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：US20210116726A1

公开(公告)日：2021-04-22

申请号：US17094736

申请日：2020-11-10

Applicant: INPHI CORPORATION

Inventor： Xiaoguang TU ,  Masaki KATO

IPC: G02F1/025 ,  G02F1/225

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.