公开(公告)号：US20220029705A1

公开(公告)日：2022-01-27

申请号：US17476122

申请日：2021-09-15

Applicant: Juniper Networks, Inc.

Inventor： John Parker ,  John Garcia ,  Brandon Gomez ,  Molly Piels ,  Anand Ramaswamy

IPC: H04B10/079 ,  H04B10/40

Abstract: An optical device such as an optical transceiver can include a cascaded built-in self-test structure that can be configured in testing mode using an active power mode and can sufficiently attenuate light away from a loopback path in an inactive power mode. The optical device can include a wafer top emitter that can be used to tune a light source for testing and calibration of optical components while the built-in self-test structure is in active mode.

公开(公告)号：US10739539B2

公开(公告)日：2020-08-11

申请号：US16354780

申请日：2019-03-15

Applicant: Juniper Networks, Inc.

Inventor： Brandon W. Buckley ,  Brian Robert Koch ,  John Garcia ,  Jared Bauters ,  Sudharsanan Srinivasan ,  Anand Ramaswamy

IPC: G02B6/42 ,  G02B6/43 ,  G02B6/30 ,  H04B10/25 ,  G02B6/12 ,  H04B10/40

Abstract: An example photonic integrated circuit includes a transmitter circuit with a optical communication path to an optical coupler configured to couple with an optical fiber. The optical communication path has a propagation direction away from the transmitter circuit and towards the optical coupler. A counter-propagating tap diverts light sent by a light source backward against the propagation direction of the optical communication path. A photodiode receives the diverted light and measures its power level. The photodiode generates a feedback signal for the optical coupler and provides the feedback signal to the optical coupler. The optical coupler receives the feedback signal and adjusts a coupling alignment of the optical communication path to the optical fiber based on the feedback signal, which indicates the measured power level of the diverted counter-propagating light.

公开(公告)号：US20210399799A1

公开(公告)日：2021-12-23

申请号：US17348335

申请日：2021-06-15

Applicant: Juniper Networks, Inc.

Inventor： Robert S. Guzzon ,  Sean P. Woyciehowsky ,  Roberto Marcoccia ,  Anand Ramaswamy ,  John Garcia ,  Sudharsanan Srinivasan

IPC: H04B10/077 ,  H04B10/40

Abstract: An optical transceiver can be calibrated using an internal receiver side eye scan generator, and calibration values (e.g., modulator values) can be stored in memory for recalibration of the optical transceiver. The eye scan generator can receive data from the transmitter portion via an integrated and reconfigurable loopback path. At a later time, different calibration values can be accessed in memory and used to recalibrate the optical transceiver or update the calibrated values using the receive-side eye scan generator operating in loopback mode.

公开(公告)号：US11153009B1

公开(公告)日：2021-10-19

申请号：US16934525

申请日：2020-07-21

Applicant: Juniper Networks, Inc.

Inventor： John Parker ,  John Garcia ,  Brandon Gomez ,  Molly Piels ,  Anand Ramaswamy

IPC: H04B10/079 ,  H04B10/40

Abstract: An optical device such as an optical transceiver can include a cascaded built-in self-test structure that can be configured in testing mode using an active power mode and can sufficiently attenuate light away from a loopback path in an inactive power mode. The optical device can include a wafer top emitter that can be used to tune a light source for testing and calibration of optical components while the built-in self-test structure is in active mode.

公开(公告)号：US20190212505A1

公开(公告)日：2019-07-11

申请号：US16354780

申请日：2019-03-15

Applicant: Juniper Networks, Inc.

Inventor： Brandon W. Buckley ,  Brian Robert Koch ,  John Garcia ,  Jared Bauters ,  Sudharsanan Srinivasan ,  Anand Ramaswamy

IPC: G02B6/42 ,  G02B6/12 ,  G02B6/43 ,  G02B6/30 ,  H04B10/25

Abstract: An example photonic integrated circuit includes a transmitter circuit with a optical communication path to an optical coupler configured to couple with an optical fiber. The optical communication path has a propagation direction away from the transmitter circuit and towards the optical coupler. A counter-propagating tap diverts light sent by a light source backward against the propagation direction of the optical communication path. A photodiode receives the diverted light and measures its power level. The photodiode generates a feedback signal for the optical coupler and provides the feedback signal to the optical coupler. The optical coupler receives the feedback signal and adjusts a coupling alignment of the optical communication path to the optical fiber based on the feedback signal, which indicates the measured power level of the diverted counter-propagating light.

公开(公告)号：US11705970B2

公开(公告)日：2023-07-18

申请号：US17349423

申请日：2021-06-16

Applicant: Juniper Networks, Inc.

Inventor： Robert S. Guzzon ,  John Garcia ,  Theodore J. Schmidt

IPC: H04B10/69

CPC classification number: H04B10/6931 ,  H04B10/691

Abstract: An optical receiver can implement a transimpedance amplifier (TIA) to process received light using a closed loop optical pre-amplification. The optical receiver can use an average input value of the TIA to control an semiconductor optical amplifier (SOA) or pre-amplification as received average signal varies. The optical receiver can include a gain controller for the TIA that can measure the TIA swing to adjust the gain of the SOA to pre-amplify received light in a closed loop control configuration.

公开(公告)号：US20210376935A1

公开(公告)日：2021-12-02

申请号：US17349423

申请日：2021-06-16

Applicant: Juniper Networks, Inc.

Inventor： Robert S. Guzzon ,  John Garcia ,  Theodore J. Schmidt

IPC: H04B10/69

Abstract: An optical receiver can implement a transimpedance amplifier (TIA) to process received light using a closed loop optical pre-amplification. The optical receiver can use an average input value of the TIA to control an semiconductor optical amplifier (SOA) or pre-amplification as received average signal varies. The optical receiver can include a gain controller for the TIA that can measure the TIA swing to adjust the gain of the SOA to pre-amplify received light in a closed loop control configuration.

公开(公告)号：US11070296B1

公开(公告)日：2021-07-20

申请号：US16887312

申请日：2020-05-29

Applicant: Juniper Networks, Inc.

Inventor： Robert S. Guzzon ,  John Garcia ,  Theodore J. Schmidt

IPC: H04B10/69

Abstract: An optical receiver can implement a transimpedance amplifier (TIA) to process received light using a closed loop optical pre-amplification. The optical receiver can use an average input value of the TIA to control an semiconductor optical amplifier (SOA) or pre-amplification as received average signal varies. The optical receiver can include a gain controller for the TIA that can measure the TIA swing to adjust the gain of the SOA to pre-amplify received light in a closed loop control configuration.

公开(公告)号：US20200333540A1

公开(公告)日：2020-10-22

申请号：US16918397

申请日：2020-07-01

Applicant: Juniper Networks, Inc.

Inventor： Brandon W. Buckley ,  Brian Robert Koch ,  John Garcia ,  Jared Bauters ,  Sudharsanan Srinivasan ,  Anand Ramaswamy

IPC: G02B6/42 ,  G02B6/43 ,  G02B6/30 ,  G02B6/12 ,  H04B10/40 ,  H04B10/25

Abstract: An example photonic integrated circuit includes a transmitter circuit with a optical communication path to an optical coupler configured to couple with an optical fiber. The optical communication path has a propagation direction away from the transmitter circuit and towards the optical coupler. A counter-propagating tap diverts light sent by a light source backward against the propagation direction of the optical communication path. A photodiode receives the diverted light and measures its power level. The photodiode generates a feedback signal for the optical coupler and provides the feedback signal to the optical coupler. The optical coupler receives the feedback signal and adjusts a coupling alignment of the optical communication path to the optical fiber based on the feedback signal, which indicates the measured power level of the diverted counter-propagating light.

公开(公告)号：US10281663B1

公开(公告)日：2019-05-07

申请号：US15864271

申请日：2018-01-08

Applicant: Juniper Networks, Inc.

Inventor： Brandon W. Buckley ,  Brian Robert Koch ,  John Garcia ,  Jared Bauters ,  Sudharsanan Srinivasan ,  Anand Ramaswamy

IPC: G02B6/42 ,  G02B6/43 ,  G02B6/30 ,  H04B10/25 ,  G02B6/12

Abstract: An example photonic integrated circuit includes a transmitter circuit with a optical communication path to an optical coupler configured to couple with an optical fiber. The optical communication path has a propagation direction away from the transmitter circuit and towards the optical coupler. A counter-propagating tap diverts light sent by a light source backward against the propagation direction of the optical communication path. A photodiode receives the diverted light and measures its power level. The photodiode generates a feedback signal for the optical coupler and provides the feedback signal to the optical coupler. The optical coupler receives the feedback signal and adjusts a coupling alignment of the optical communication path to the optical fiber based on the feedback signal, which indicates the measured power level of the diverted counter-propagating light.