公开(公告)号：US20240280756A1

公开(公告)日：2024-08-22

申请号：US18135022

申请日：2023-04-14

Applicant: LUMENTUM TECHNOLOGY UK LIMITED

Inventor： Colin SMITH ,  Stuart CONLEY ,  Samuel Justin JONES

IPC: G02B6/293 ,  G01J3/26

CPC classification number: G02B6/29359 ,  G01J3/26

Abstract: In some implementations, an optical assembly includes a first etalon, a second etalon, and an optical element disposed between the first etalon and the second etalon. The first etalon is configured to transmit a collimated light beam from an input surface of the first etalon to an output surface of the first etalon, and to allow the collimated light beam to propagate from an output surface of the first etalon to the optical element. The optical element is configured to receive the collimated light beam, to change the collimated light beam to a de-collimated light beam, and to allow the de-collimated light beam to propagate from the optical element to an input surface of the second etalon. The second etalon is configured to transmit the de-collimated light beam from the input surface of the second etalon to an output surface of the second etalon.

公开(公告)号：US20230194906A1

公开(公告)日：2023-06-22

申请号：US16957309

申请日：2018-12-21

Applicant: Lumentum Technology UK Limited

Inventor： Selina FARWELL

IPC: G02F1/01 ,  G02F1/025 ,  G02F1/015

CPC classification number: G02F1/0123 ,  G02F1/025 ,  G02F1/0156 ,  G02F1/0157

Abstract: A method of equalising optical losses, at a required operating wavelength, in waveguide sections in an optoelectronic device comprising a first semiconductor waveguide section and a second semiconductor waveguide section, the method comprising determining (1301) a first optical loss through the first waveguide section for a signal with the required operating wavelength, determining (1302) a second optical loss through the second waveguide section for the signal, determining (1303) a loss difference between the first optical loss and the second optical loss, determining (1304) a first bias voltage based on the loss difference and the operating wavelength, such that the loss difference is reduced, and applying (1305) the bias voltage to the first waveguide section.

公开(公告)号：US11556042B2

公开(公告)日：2023-01-17

申请号：US16604917

申请日：2018-09-24

Applicant: Lumentum Technology UK Limited

Inventor： Neil David Whitbread ,  Stephen Jones

IPC: G02F1/225

Abstract: A waveguide structure for use in a balanced push-pull Mach Zehnder modulator. The waveguide structure comprises a plurality of layers. The layers comprise, in order: an insulating or semi-insulating substrate; an lower cladding layer; an waveguide core layer; and an upper cladding layer. The lower cladding layer, waveguide core layer, and upper cladding layer are etched to form: a signal waveguide and a ground waveguide, which are connected via the lower cladding layer; and a signal line and a ground line, each located adjacent to the respective waveguide, and each connected to the respective waveguide via one or more respective resistive structures connected in the plane of the lower cladding layer.

公开(公告)号：US20220404534A1

公开(公告)日：2022-12-22

申请号：US16604921

申请日：2018-09-27

Applicant: Lumentum Technology UK Limited

Inventor： Adrian Perrin JANSSEN

IPC: G02B5/28 ,  G02B6/293

Abstract: An optical filter comprising a first lens, and first and second optical elements. The first lens has an optical axis, configured to focus beams propagating parallel to the optical axis at a focal point. The first optical element has a first semi-reflective surface, the first semi-reflective surface being curved and having a first radius of curvature around a first centre of curvature on the optical axis. The second optical element has a second semi-reflective surface. The first radius of curvature is between 1 and 10,000 times the distance between the first semi reflective surface and the focal point along the optical axis. The first and second semi-reflective surfaces are arranged to form a resonator. The first lens and the first and second semi-reflective surfaces are arranged along the optical axis such that light is transmittable along an optical path through the lens and the resonator. The optical filter further comprises one or more expansion elements located outside of the optical path, and arranged such that expansion of the expansion elements causes relative movement of the first and second semi-reflective surfaces.

公开(公告)号：US20210011221A1

公开(公告)日：2021-01-14

申请号：US16652651

申请日：2019-01-30

Applicant: Lumentum Technology UK Limited

Inventor： Adrian Perrin JANSSEN

IPC: G02B6/293 ,  H04B10/077 ,  H04B10/25

Abstract: An optical filter assembly comprising: a tuneable optical filter; a beam splitter assembly configured to split an input beam into an output beam, a reference beam, and a probe beam, and to direct the output beam and the probe beam through the tuneable optical filter, such that the probe beam is at an angle α to the output beam; a first detector configured to measure the intensity S0 of the reference beam; a second detector configured to measure the intensity S1 of the probe beam after it has passed through the filter; a controller configured to adjust the tuneable optical filter on the basis of the measured intensities of the reference and probe beams.

公开(公告)号：US20200232782A1

公开(公告)日：2020-07-23

申请号：US16839488

申请日：2020-04-03

Applicant: Lumentum Technology UK Limited

Inventor： Adrian Perrin JANSSEN

IPC: G01B9/02 ,  G01J3/453 ,  H04B10/572

Abstract: There is described an interferometer for use in an optical locker. The interferometer comprises at least two transparent materials having different thermal path length sensitivities. The interferometer is configured such that an input beam is split by the interferometer into first and second intermediate beams, which recombine to form an output beam, the first and second intermediate beams travelling along respective first and second intermediate beam paths which do not overlap. At least one of the intermediate beam paths passes through at least two of the transparent materials. A length of each intermediate beam path which passes through each transparent material is selected such that an optical path difference between the first and second intermediate beam path is substantially independent of temperature.

公开(公告)号：US20200064706A1

公开(公告)日：2020-02-27

申请号：US16456721

申请日：2019-06-28

Applicant: Lumentum Technology UK Limited

Inventor： Marco VILLA ,  Luigi GOBBI ,  Stefano BALSAMO

IPC: G02F1/225 ,  G02F1/01 ,  G02F1/035

Abstract: An electro-optic modulator. The modulator is made as a plurality of discrete elements, and adjacent elements abut such that there are no free space optics between adjacent discrete elements. The modulator comprises a radio frequency, RF, element configured to modulate light passing through the element based on an electrical RF input. The plurality of discrete elements comprises a first set of discrete elements fabricated from thin film lithium niobate, TFLN, and a second set of discrete elements fabricated from silicon photonics, SiPh. The first set of discrete elements comprises the RF element.

公开(公告)号：US20250007616A1

公开(公告)日：2025-01-02

申请号：US18478417

申请日：2023-09-29

Applicant: Lumentum Technology (UK) Limited

Inventor： Ricardo SAAD ,  Chiachen CHANG

IPC: H04B10/50 ,  H04B10/564

Abstract: An optical transmitter may include a transmitter device configured to modulate an optical signal with a data signal. The optical transmitter may include a controller configured to output the data signal to the transmitter device, where the data signal has a modulation amplitude to control a modulation of the optical signal by the transmitter device. The controller may be configured to obtain a feedback signal based on outputting the data signal to the transmitter device. The controller may be configured to determine, based on the feedback signal, an actual modulation index of the optical signal modulated with the data signal. The controller may be configured to adjust the modulation amplitude of the data signal based on a difference between the actual modulation index and a target modulation index.

公开(公告)号：US12101126B1

公开(公告)日：2024-09-24

申请号：US18318103

申请日：2023-05-16

Applicant: LUMENTUM TECHNOLOGY UK LIMITED

Inventor： Shibnath Pathak ,  Amit Mizrahi

IPC: H04B10/61

CPC classification number: H04B10/6165 ,  H04B10/613 ,  H04B10/615

Abstract: An optical coherent receiver includes a 90-degree optical hybrid configured to receive an input signal and a reference signal, and mix the input signal with four quadrature states associated with the reference signal to generate four output signals. The 90-degree optical hybrid includes a plurality of 3-dB couplers; and a plurality of optical waveguides, wherein each optical waveguide of the plurality of optical waveguides couples two respective 3-dB couplers of the plurality of 3-dB couplers, and wherein each optical waveguide of the plurality of optical waveguides has a same optical path length. Each optical waveguide of the plurality of optical waveguides is dimensioned according to a figure of merit (FoM) to reduce a phase error.

公开(公告)号：US20240291571A1

公开(公告)日：2024-08-29

申请号：US18326313

申请日：2023-05-31

Applicant: LUMENTUM TECHNOLOGY UK LIMITED

Inventor： Stuart CONLEY ,  Colin SMITH ,  Nick BROOKS

IPC: H04B10/61 ,  H04B10/079

CPC classification number: H04B10/61 ,  H04B10/07955

Abstract: An optical receiver includes an integrated receiver chip includes a data port configured to receive an optical data signal derived from a receive optical signal, a first waveguide coupled to the data port and configured to transmit the optical data signal from the data port to an optical waveguide circuit of the integrated receiver chip, a power monitoring port configured to receive an optical monitoring signal derived from the receive optical signal, and a second waveguide coupled to the power monitoring port and configured to transmit the optical monitoring signal to a monitor photodiode that is monolithically integrated in the integrated receiver chip. The monitor photodiode is configured to convert the optical monitoring signal into an electrical signal representative of an optical input power of the receive optical signal.