公开(公告)号：US20190035632A1

公开(公告)日：2019-01-31

申请号：US16072013

申请日：2017-01-23

Applicant: UNIVERSITY OF SOUTHAMPTON

Inventor： David John THOMSON ,  Graham Trevor REED ,  Robert TOPLEY

IPC: H01L21/265 ,  H01L21/324 ,  H01L21/67 ,  H01L21/66 ,  H01L21/268

Abstract: A method of trimming the refractive index of material forming at least part of one or more structures integrated in one or more pre-fabricated devices, the method comprising: implanting one or more first regions of material of one or more pre-fabricated devices, encompassing at least partially one or more device structures, with ions to alter the crystal form of the material within the one or more first regions and change the refractive index of the material within the one or more first regions; and heat treating one or more second regions of material of the one or more devices, encompassing at least partially the one or more first regions, to alter the crystal form of the material within the one or more first regions encompassed by the one or more second regions and change the refractive index thereof, thereby trimming the refractive index of the material of at least part of the one or more device structures, such that the one or more device structures provide one or more predetermined device outputs.

公开(公告)号：US20190341740A1

公开(公告)日：2019-11-07

申请号：US15999104

申请日：2017-02-17

Applicant: Rockley Photonics Limited ,  University of Southampton

Inventor： Aaron ZILKIE ,  David John THOMSON ,  Frederic Yannick GARDES

IPC: H01S5/026 ,  H01S5/0625 ,  H01S5/125 ,  H01S5/10 ,  H01S5/14 ,  H01S5/40

Abstract: A discrete wavelength tunable laser capable of switching between a plurality of lasing channels of different wavelengths, the tunable laser comprising: a semiconductor optical amplifier (SOA); a wavelength demultiplexer (Demux), having a Demux input which receives the output from the SOA, and a plurality of Demux outputs, each Demux output defining a different spatial path for a respective lasing channel; each of the respective lasing channels being within the bandwidth of the SOA; a reflector located within each spatial path for reflecting light of the respective lasing channel; and a lasing suppression mechanism located within each lasing channel; wherein one or more desired lasing channels are selected by application of the lasing suppression mechanism in each spatial path other than the one or more spatial paths corresponding to the one or more desired lasing channels.

公开(公告)号：US20230006760A1

公开(公告)日：2023-01-05

申请号：US17756592

申请日：2020-11-26

Applicant: UNIVERSITY OF SOUTHAMPTON

Inventor： Ke LI ,  David John THOMSON ,  Shenghao LIU ,  Graham Trevor REED ,  Weiwei ZHANG ,  Wei CAO

IPC: H04J14/08 ,  H04Q11/00

Abstract: A method of generating multiple channels of optical pulses comprises: providing a continuous wave optical input having an optical power; dividing the optical power of the optical input into equal consecutive slices in the time domain; and allocating the consecutive slices sequentially to two or more optical outputs such that each output forms a channel of optical pulses of equal pulse repetition rate shifted in time relative to the or each other channel.

公开(公告)号：US20200089076A1

公开(公告)日：2020-03-19

申请号：US16496934

申请日：2018-03-22

Applicant: ROCKLEY PHOTONICS LIMITED ,  UNIVERSITY OF SOUTHAMPTON

Inventor： Guomin YU ,  Aaron John ZILKIE ,  Yi ZHANG ,  David John THOMSON

IPC: G02F1/225 ,  G02F1/01

Abstract: A method of operating an optical modulator. The optical modulator having: a rib waveguide which includes a junction which is either a PIN or PN junction, the junction having a breakdown voltage. The method comprising: applying a reverse bias to the junction, so as to operate the optical modulator around the breakdown voltage of the junction; operating the modulator in an avalanche multiplication and/or band-to-band tunnelling mode by increasing the reverse bias past the breakdown voltage.

公开(公告)号：US20220404650A1

公开(公告)日：2022-12-22

申请号：US17753276

申请日：2020-08-25

Applicant: ROCKLEY PHOTONICS LIMITED ,  UNIVERSITY OF SOUTHAMPTON

Inventor： Adam SCOFIELD ,  Aaron John ZILKIE ,  Guomin YU ,  Thomas Pierre SCHRANS ,  David John THOMSON ,  Weiwei ZHANG

IPC: G02F1/025 ,  G02F1/01

Abstract: An optical modulator. The optical modulator comprising: a micro-ring resonator; and a bus waveguide, including an input waveguide region, an output waveguide region, and a coupling waveguide region optically coupled to the micro-ring resonator and located between the input waveguide region and the output waveguide region. The micro-ring resonator includes a modulation region, the modulation region being formed of a silicon portion and a III-V semiconductor portion separated by a crystalline rare earth oxide dielectric layer.

公开(公告)号：US20220131616A1

公开(公告)日：2022-04-28

申请号：US17436192

申请日：2020-02-26

Applicant: University of Southampton

Inventor： Graham Trevor REED ,  Ke LI ,  Sheghao LIU ,  David John THOMSON

IPC: H04B10/54 ,  H04B10/079 ,  H04B10/2513

Abstract: An optical modulation system comprises a signal source configured to generate an amplitude modulated electrical signal having a bandwidth and divided into frequency components comprising at least a first frequency component covering a first portion of the bandwidth and a second frequency component covering a second portion of the bandwidth; and an electro-optic modulator for receiving an input optical signal, the modulator having a first optical path and a second optical path, the input optical signal being divided between the first optical path and the second optical path and recombined after propagation along the first optical path and the second optical path to produce an output optical signal, and at least one of the first optical path and the second optical path comprising a phase shifter comprising a pair of electrodes in which each electrode is configured to receive a driving signal; wherein the or each phase shifter is coupled to the signal source to receive at least one of said frequency components as a driving signal for an electrode, and the phase shifters are arranged such that the or each phase shifter receives a different pair of driving signals.