公开(公告)号：US20220291341A1

公开(公告)日：2022-09-15

申请号：US17303421

申请日：2021-05-28

Applicant: Lumentum Operations LLC

Inventor： Suning XIE ,  Abhinav ROHIT ,  Lucas MORALES ,  Mikhail DOLGANOV ,  Peter TRAN

IPC: G01S7/484 ,  G01S17/894 ,  G01S7/486 ,  H01S5/183

Abstract: A characterization circuit for an optical device includes: an optical device, a switch, a switch driver, one or more resistors, and one or more capacitors. The switch driver is configured to receive a trigger pulse from an external pulse generator and to provide the trigger pulse to the switch, which causes the switch to be in an on state. The one or more capacitors are configured to, when the switch is in an off state, receive a charge current (e.g., with a greater than 50 nanoseconds rise time) from an external driver voltage source via the one or more resistors; and, when the switch is in the on state, discharge a current pulse (e.g., with a less than 10 nanosecond pulse width) to the optical device. The optical device is configured to receive the current pulse and to emit, based on the current pulse, an optical output pulse.

公开(公告)号：US20220059983A1

公开(公告)日：2022-02-24

申请号：US17301324

申请日：2021-03-31

Applicant: Lumentum Operations LLC

Inventor： Mikhail DOLGANOV ,  Hao HUANG ,  Lijun ZHU

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

Abstract: A charged inductive laser driver may be configured to provide a pre-emphasized current to a first laser load and a second laser load, wherein the pre-emphasized current is configured to achieve a square pulse as a combined output of the first laser load and the second laser load.

公开(公告)号：US20210296855A1

公开(公告)日：2021-09-23

申请号：US16912338

申请日：2020-06-25

Applicant: Lumentum Operations LLC

Inventor： Hao HUANG ,  Mikhail DOLGANOV ,  Lijun ZHU

IPC: H01S5/042 ,  G01S7/484 ,  G01S17/10 ,  H01S3/11

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：US20230299555A1

公开(公告)日：2023-09-21

申请号：US17660108

申请日：2022-04-21

Applicant: Lumentum Operations LLC

Inventor： Mikhail DOLGANOV ,  Lijun ZHU

IPC: H01S5/042 ,  H01S5/42 ,  G01S7/484 ,  G01S7/481 ,  H03K17/687

CPC classification number: H01S5/0428 ,  H01S5/423 ,  G01S7/484 ,  G01S7/4815 ,  H03K17/6871

Abstract: In some implementations, a controller may cause a first switch of a driver circuit to transition from an open state to a closed state to charge an inductive element of the driver circuit. The controller may cause the first switch to transition from the closed state to the open state to discharge the inductive element. The controller may cause a second switch of the driver circuit to transition from an open state to a closed state to select a capacitive element to be charged by discharging the inductive element. The controller may cause a third switch of the driver circuit to transition from an open state to a closed state to discharge the selected capacitive element to provide an electrical pulse to an optical emitter, of an array of optical emitters of the driver circuit, that is connected to the selected capacitive element.

公开(公告)号：US20230112690A1

公开(公告)日：2023-04-13

申请号：US17643322

申请日：2021-12-08

Applicant: Lumentum Operations LLC

Inventor： Mikhail DOLGANOV ,  Lijun ZHU ,  Hao HUANG

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

Abstract: A driver circuit may include an inductive element and a first circuit path connected to the inductive element, the first circuit path including an optical emitter and a capacitive element in series with the optical emitter. The driver circuit may include a second circuit path connected to the inductive element, the second circuit path including a voltage divider element to produce an output signal and a signal output to provide the output signal to a time-to-digital converter. The driver circuit may include a switch having an open state and a closed state. The switch in the closed state may cause current to charge the inductive element. The switch transitioning from the closed state to the open state may cause the inductive element to discharge current to provide an electrical pulse through the first circuit path to the optical emitter and through the second circuit path to the signal output.

公开(公告)号：US20230046942A1

公开(公告)日：2023-02-16

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

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：US20230021526A1

公开(公告)日：2023-01-26

申请号：US17643712

申请日：2021-12-10

Applicant: Lumentum Operations LLC

Inventor： Mikhail DOLGANOV ,  Lijun ZHU

IPC: G01S7/4865 ,  G01S17/08

Abstract: A driver circuit may include an array of optical emitters arranged in one or more rows and one or more columns. The array of optical emitters includes an optical emitter associated with a row and a column. The driver circuit may include a capacitive element connected to the row, a voltage booster element connected to the capacitive element, where the voltage booster element includes an inductive element, and a first switch having an open state and a closed state. The first switch in the closed state is to cause charging of the inductive element, and in the open state is to cause discharging of the inductive element to charge the capacitive element. The driver circuit may include a second switch having an open state and a closed state. The second switch in the closed state is to cause discharging of the capacitive element through the row and the column.

公开(公告)号：US20220299604A1

公开(公告)日：2022-09-22

申请号：US17304074

申请日：2021-06-14

Applicant: Lumentum Operations LLC

Inventor： Mikhail DOLGANOV ,  Lijun ZHU ,  Hao HUANG ,  Sean BURNS

IPC: G01S7/484 ,  G01S17/10 ,  H01S5/042

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 of optical emitters may include an optical emitter associated with a row of the one or more rows and a column of the one or more columns. The driver circuit may include a first switch having an open state and a closed state and a capacitive element connected to the row. The first switch in the closed state may cause charging of the capacitive 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, and may cause discharging of the capacitive element through the row and the column to provide an electrical pulse to the optical emitter.

公开(公告)号：US20220209494A1

公开(公告)日：2022-06-30

申请号：US17301332

申请日：2021-03-31

Applicant: Lumentum Operations LLC

Inventor： Hao HUANG ,  Mikhail DOLGANOV ,  Huanlin ZHU ,  Lijun ZHU

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

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：US20200333438A1

公开(公告)日：2020-10-22

申请号：US16827327

申请日：2020-03-23

Applicant: Lumentum Operations LLC

Inventor： Konstantin Petrovich PETROV ,  Mikhail DOLGANOV

IPC: G01S7/484 ,  H01S5/042

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.