公开(公告)号：US12040592B2

公开(公告)日：2024-07-16

申请号：US17445786

申请日：2021-08-24

Applicant: Lumentum Operations LLC

Inventor： Wei Shi ,  Hao Huang ,  Siu Kwan Cheung ,  Huanlin Zhu ,  Lijun Zhu

IPC: H01S5/024 ,  H01L23/373 ,  H01L23/498 ,  H01S5/02315 ,  H01S5/183

CPC classification number: H01S5/02469 ,  H01L23/3735 ,  H01L23/49827 ,  H01L23/49833 ,  H01S5/02315 ,  H01S5/183

Abstract: A substrate may include a thermally conductive metal core having a top side and a bottom side, a first dielectric coating on the top side of the metal core, a second dielectric coating on the bottom side of the metal core, a first metal circuit layer formed above the first dielectric coating, and a second metal circuit layer formed under the second dielectric coating. In some implementations, the first dielectric coating and the second dielectric coating have thicknesses below sixty micrometers and respective thermal resistances under fifteen degrees Celsius per watt. In some implementations, one or more electrical currents flowing vertically across a dielectric coating have a low parasitic inductance based on the thickness of the dielectric coating, and the metal core may dissipate heat flowing across the dielectric coating and into the metal core.

公开(公告)号：US12176680B2

公开(公告)日：2024-12-24

申请号：US17305138

申请日：2021-06-30

Applicant: Lumentum Operations LLC

Inventor： Mikhail Dolganov ,  Hao Huang ,  Lijun Zhu

IPC: H01S3/00 ,  H01S5/042 ,  H01S5/183 ,  H01S5/42 ,  H03K17/687

Abstract: In some implementations, an electrical drive circuit may include a first optical load terminal to receive an anode of a first optical load. The electrical drive circuit may include a junction section that includes a first electrical junction and a second optical load terminal to receive a cathode of the first optical load and an anode of a second optical load. The electrical drive circuit may include a third optical load terminal to receive a cathode of the second optical load; a first switch connected between the third optical load terminal and a common ground; a coupling capacitor connected between the first electrical junction and a second electrical junction; a second switch connected between the second electrical junction and the common ground; and an inductor connected from a second branch of the second electrical junction and between the second electrical junction and the common ground.

公开(公告)号：US11990729B2

公开(公告)日：2024-05-21

申请号：US16916976

申请日：2020-06-30

Applicant: Lumentum Operations LLC

Inventor： Hao Huang ,  Mikhail Dolganov ,  Lijun Zhu

IPC: H01S5/042 ,  H01S5/026 ,  H01S5/0625 ,  H01S5/183 ,  H01S5/42

CPC classification number: H01S5/06253 ,  H01S5/0261 ,  H01S5/0428 ,  H01S5/183 ,  H01S5/423

Abstract: An optical device may drive a compensation section of a multi-section optical load to emit a compensation optical pulse by providing, for a first time interval, a compensation electrical pulse to the compensation section. The optical device may drive a main section of the multi-section optical load to emit a main optical pulse by generating, for a second time interval, a main electrical pulse, wherein at least a portion of the first time interval overlaps with the second time interval. The optical device may emit a combined optical pulse, wherein the combined optical pulse includes the compensation optical pulse and the main optical pulse, and wherein the combined optical pulse has a shorter rise time than the main optical pulse.

公开(公告)号：US11955770B2

公开(公告)日：2024-04-09

申请号：US17301332

申请日：2021-03-31

Applicant: Lumentum Operations LLC

Inventor： Hao Huang ,  Mikhail Dolganov ,  Huanlin Zhu ,  Lijun Zhu

IPC: H01S3/00 ,  H01S5/02345 ,  H01S5/026 ,  H01S5/042 ,  H01S5/068 ,  H01S5/183

CPC classification number: H01S5/0428 ,  H01S5/02345 ,  H01S5/0261 ,  H01S5/06825 ,  H01S5/183

Abstract: A driver circuit may include a source, a first circuit path, and a second circuit path. The a first circuit path may be connected to the source and include a first anode pad, a first set of connecting elements to connect the first anode pad to an anode of an optical load, a second anode pad that is separate from the first anode pad, a second set of connecting elements to connect the anode of the optical load to the second anode pad, and a switch. The switch being in a closed state causes current to charge the first set of connecting elements and the second set of connecting elements through the first circuit path. The switch transitioning from the closed state to the open state causes the first set of connecting elements to discharge current through the second circuit path to provide an electrical pulse to the optical load.

公开(公告)号：US11870215B2

公开(公告)日：2024-01-09

申请号：US16912338

申请日：2020-06-25

Applicant: Lumentum Operations LLC

Inventor： Hao Huang ,  Mikhail Dolganov ,  Lijun Zhu

IPC: H01S5/042 ,  H01S5/062 ,  G01S17/10

CPC classification number: H01S5/0428 ,  H01S5/0425 ,  G01S17/10 ,  H01S5/06216

Abstract: An electrical drive circuit may charge one or more inductive elements, where the electrical drive circuit includes the one or more inductive elements and a capacitive element in series between the one or more inductive elements and the optical load, and where the electrical drive circuit is connected to one or more sources. The electrical drive circuit may generate, after the charging and for a first time interval, a main electrical pulse. The electrical drive circuit may discharge, after the charging and for a second time interval, the one or more inductive elements to provide a compensation electrical pulse, where at least a portion of the second time interval overlaps with the first time interval. The electrical drive circuit may combine the main electrical pulse and the compensation electrical pulse into a combined electrical pulse. The electrical drive circuit may provide the combined electrical pulse to the optical load.

公开(公告)号：US12092768B2

公开(公告)日：2024-09-17

申请号：US18487541

申请日：2023-10-16

Applicant: Lumentum Operations LLC

Inventor： Hao Huang ,  Mikhail Dolganov ,  Lijun Zhu

IPC: G01S7/4861 ,  G01S7/486 ,  G01S7/4865 ,  G02F1/01 ,  H01S5/042 ,  H03K3/53

CPC classification number: G01S7/4861 ,  G01S7/4865 ,  G01S7/4868 ,  G02F1/0121 ,  H01S5/042 ,  H01S5/0428 ,  H03K3/53 ,  G02F2203/26

Abstract: In some implementations, an electrical drive circuit may generate a rectangular optical pulse using cathode pre-charge and cathode-pull compensation. The electrical drive circuit may include an anode and a cathode to connect an optical load, a switch, a first source connected between the anode and a ground, a rectifier connected between the cathode and the switch, a capacitor connected in parallel with the rectifier, a second source connected to the ground, and an inductor connected between the switch and the second source. In some implementations, when the switch is closed and the optical load is connected, a first current is provided to the optical load through the first source, the rectifier, and the switch, and a second current is provided to the optical load through the first source, the capacitor, and the switch, where a rise time of the first current complements a fall time of the second current.

公开(公告)号：US11789129B2

公开(公告)日：2023-10-17

申请号：US16948680

申请日：2020-09-29

Applicant: Lumentum Operations LLC

Inventor： Hao Huang ,  Mikhail Dolganov ,  Lijun Zhu

IPC: G01S7/4861 ,  G02F1/01 ,  H01S5/042 ,  H03K3/53 ,  G01S7/4865 ,  G01S7/486

CPC classification number: G01S7/4861 ,  G01S7/4865 ,  G01S7/4868 ,  G02F1/0121 ,  H01S5/042 ,  H01S5/0428 ,  H03K3/53 ,  G02F2203/26

Abstract: In some implementations, an electrical drive circuit may generate a rectangular optical pulse using cathode pre-charge and cathode-pull compensation. The electrical drive circuit may include an anode and a cathode to connect an optical load, a switch, a first source connected between the anode and a ground, a rectifier connected between the cathode and the switch, a capacitor connected in parallel with the rectifier, a second source connected to the ground, and an inductor connected between the switch and the second source. In some implementations, when the switch is closed and the optical load is connected, a first current is provided to the optical load through the first source, the rectifier, and the switch, and a second current is provided to the optical load through the first source, the capacitor, and the switch, where a rise time of the first current complements a fall time of the second current.

公开(公告)号：US11757533B2

公开(公告)日：2023-09-12

申请号：US17449164

申请日：2021-09-28

Applicant: Lumentum Operations LLC

Inventor： Mikhail Dolganov ,  Lijun Zhu ,  Hao Huang

IPC: H04B10/564 ,  H04B10/50

CPC classification number: H04B10/564 ,  H04B10/504

Abstract: A shutdown circuit may include a filter, for receiving a laser trigger signal for a laser emitter, that is configured to output a filtered signal. The shutdown circuit may include a logic gate configured to receive the filtered signal and at least one of a first signal based on a signal from a photodiode or a second signal based on a signal from a conductive path. The shutdown circuit may include a flip-flop configured to receive an output of the logic gate and to output an enablement signal that is based on the output of the logic gate, and a driver circuit for a switch configured to control current flow to the laser emitter. The driver circuit may be configured to receive the enablement signal and the laser trigger signal and to output the laser trigger signal based on whether the enablement signal is a first or a second voltage.