公开(公告)号：US20220299610A1

公开(公告)日：2022-09-22

申请号：US17304070

申请日：2021-06-14

Applicant: Lumentum Operations LLC

Inventor： Mikhail DOLGANOV ,  Lijun ZHU ,  Hao HUANG ,  Siu Kwan CHEUNG

IPC: G01S7/4865 ,  G01S17/10 ,  G01S7/484 ,  G01S17/89

Abstract: In some implementations, a driver circuit may include a source to provide an electrical input, and an array of optical emitters arranged in one or more rows and one or more columns. The array may include an optical emitter associated with a row and a column. The driver circuit may include a first switch having an open state and a closed state, and an inductive element connected to the row. The first switch in the closed state may cause current to charge the inductive element. The driver circuit may include a second switch having an open state and a closed state. The second switch in the closed state may select the column. The first switch transitioning from the closed state to the open state may cause the inductive element to discharge current through the row, and through the column when the second switch is in the closed state.

公开(公告)号：US20220224074A1

公开(公告)日：2022-07-14

申请号：US17305138

申请日：2021-06-30

Applicant: Lumentum Operations LLC

Inventor： Mikhail DOLGANOV ,  Hao HUANG ,  Lijun ZHU

IPC: H01S5/042

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：US20220011410A1

公开(公告)日：2022-01-13

申请号：US16948680

申请日：2020-09-29

Applicant: Lumentum Operations LLC

Inventor： Hao HUANG ,  Mikhail DOLGANOV ,  Lijun ZHU

IPC: G01S7/4861 ,  G01S7/4865 ,  G01S7/486 ,  G02F1/01

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：US20240039637A1

公开(公告)日：2024-02-01

申请号：US18464591

申请日：2023-09-11

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.

公开(公告)号：US20230361096A1

公开(公告)日：2023-11-09

申请号：US18068252

申请日：2022-12-19

Applicant: Lumentum Operations LLC

Inventor： Wei SHI ,  Kevin WANG ,  Michael MILLER ,  Steve CHUENG ,  Mikhail DOLGANOV ,  Lijun ZHU

IPC: H01L25/16 ,  H01S5/183 ,  H01S5/02208 ,  H01S5/02253 ,  H01S5/02315 ,  H01S5/0239 ,  H01S5/026

CPC classification number: H01L25/167 ,  H01L25/165 ,  H01S5/18388 ,  H01S5/02208 ,  H01S5/02253 ,  H01S5/02315 ,  H01S5/0239 ,  H01S5/0261 ,  H01S5/02257

Abstract: An optical package may include a fan-out-wafer-level-packaging (FOWLP) sub-package including a redistribution layer (RDL) on a molded component including an electrical chip. The optical package may include an optical chip over the FOWLP sub-package. The optical chip may be electrically connected to the RDL. An area of a surface of the RDL may be larger than an area of a surface of the optical chip. The optical package may include a package housing over the optical chip such that light to be received or transmitted by the optical chip may is to pass through the package housing.

公开(公告)号：US20230352384A1

公开(公告)日：2023-11-02

申请号：US18188622

申请日：2023-03-23

Applicant: Lumentum Operations LLC

Inventor： Wei SHI ,  Mikhail DOLGANOV ,  Steve CHEUNG ,  Lijun ZHU

IPC: H01L23/498 ,  H05K3/46 ,  H05K1/11 ,  H05K1/03 ,  H05K1/16

CPC classification number: H01L23/49822 ,  H05K1/0306 ,  H05K1/115 ,  H05K1/162 ,  H05K3/4688 ,  H05K2201/0187 ,  H05K2201/09563

Abstract: In some implementations, a substrate comprises a ceramic core, multiple metal-filled vias through the ceramic core, and a first metal layer, on a top side of the ceramic core, including metal traces, over respective metal-filled vias. The substrate comprises a second metal layer, including a first electrical contact over a first metal trace, a second electrical contact over a second metal trace, and a third electrical contact over a third metal trace, where the second metal trace is electrically isolated from the first and third metal traces. The substrate comprises a thin dielectric layer separating the first metal layer and the second metal layer. The dielectric layer between the first metal layer and the second layer provides the substrate with a low parasitic inductance and a low thermal resistance based on a thickness of the dielectric layer and/or a material used for the dielectric layer.

公开(公告)号：US20210296857A1

公开(公告)日：2021-09-23

申请号：US16916976

申请日：2020-06-30

Applicant: Lumentum Operations LLC

Inventor： Hao HUANG ,  Mikhail DOLGANOV ,  Lijun ZHU

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

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：US20240118395A1

公开(公告)日：2024-04-11

申请号：US18500324

申请日：2023-11-02

Applicant: Lumentum Operations LLC

Inventor： Konstantin Petrovich PETROV ,  Mikhail DOLGANOV

IPC: G01S7/484 ,  H01S5/042 ,  H04B10/50

CPC classification number: G01S7/484 ,  H01S5/0428 ,  H04B10/50 ,  H04B10/524

Abstract: A driver circuit, for generating narrow electrical pulses of high repetition rate with high peak current and low after pulse ringing to drive an optical load, may include a source, a first circuit path, and a second circuit path. The first circuit path may be connected to the source and may include inductive elements and a switch. The switch being in a closed state may charge current in the inductive elements through the first circuit path. The second circuit path may connect to the optical load and may be connected to the source. The second circuit path may include the inductive elements and a capacitive element in series with the optical load. The switch transitioning from the closed state to an open state may discharge current from the inductive elements through the second circuit path to provide an electrical pulse to the optical load.

公开(公告)号：US20240036174A1

公开(公告)日：2024-02-01

申请号：US18487541

申请日：2023-10-16

Applicant: Lumentum Operations LLC

Inventor： Hao HUANG ,  Mikhail DOLGANOV ,  Lijun ZHU

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

CPC classification number: G01S7/4861 ,  G01S7/4865 ,  G02F1/0121 ,  G01S7/4868 ,  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：US20230051475A1

公开(公告)日：2023-02-16

申请号：US17451742

申请日：2021-10-21

Applicant: Lumentum Operations LLC

Inventor： Mikhail DOLGANOV ,  Lijun ZHU ,  Sean BURNS ,  Yuanzhen ZHUANG

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

Abstract: A driver circuit may include an optical emitter, a capacitive element, and an inductive element. The driver circuit may include a first switch that, in a closed state, is to cause charging of the inductive element, and when transitioning from the closed state to an open state is to cause discharging of the inductive element to charge the capacitive element. The driver circuit may include a second switch that in a closed state is to cause discharging of the capacitive element to provide an electrical pulse to the optical emitter. The driver circuit may include a signal generator configured to generate a first signal for controlling the open state and the closed state of the first switch, and a pulse shortening element configured to shorten a pulse width of the first signal to generate a second signal for controlling the open state and the closed state of the second switch.