公开(公告)号：US11929586B2

公开(公告)日：2024-03-12

申请号：US17181414

申请日：2021-02-22

Applicant: University of Southampton

Inventor： Masaaki Sakakura ,  Yanhao Yu ,  Peter Kazansky ,  Lei Wang

IPC: H01S3/00 ,  B23K26/0622

CPC classification number: H01S3/0057 ,  B23K26/0624

Abstract: A method of delivering optical energy to a substrate comprises applying a temporal group of optical pulses to a region of the substrate, wherein the temporal group comprises twenty or fewer pulses of a femtosecond pulse duration, arranged as a first subgroup of pulses comprising up to three pulses followed by a second subgroup of pulses comprising the remaining pulses in the temporal group; and wherein energies of the pulses are controlled such that pulses in the first subgroup have a first energy per pulse and pulses in a second subgroup of pulses have a second energy per pulse which is less than the first energy.

公开(公告)号：US12265245B2

公开(公告)日：2025-04-01

申请号：US17628998

申请日：2020-08-27

Applicant: University of Southampton

Inventor： Masaaki Sakakura ,  Lei Wang ,  Peter Kazansky ,  Yanhao Yu ,  Yuhao Lei

IPC: G11B7/09 ,  C03C23/00 ,  G02B5/30 ,  G11B7/0045 ,  G02B5/32

Abstract: A method of fabricating an optical element includes providing a substrate of a transparent material in which is to be formed a plurality of birefringent nanostructures spaced apart; generating from the output of a source of femtosecond laser pulses a laser beam group comprising a plurality of focused seeding beams having a circular polarisation; directing the laser beam group onto the surface of the substrate at a first position and applying one or more femtosecond laser pulses from each beam to corresponding volumes in the substrate; repeatedly translating the laser beam group relative to the substrate parallel to the line of seeding beams; translating the laser beam group relative to the substrate and repeating the repeated translation and application of the femtosecond laser pulses; wherein the relative translation of the laser beam group and the substrate aligns the writing beam with successive corresponding volumes.

公开(公告)号：US12040585B2

公开(公告)日：2024-07-16

申请号：US17181472

申请日：2021-02-22

Applicant: University of Southampton

Inventor： Masaaki Sakakura ,  Yanhao Yu ,  Peter Kazansky ,  Lei Wang

IPC: G11B7/0037 ,  B23K26/0622 ,  B23K26/08 ,  B23K26/082 ,  G01N21/95 ,  G02B5/30 ,  G02B26/08 ,  G02B27/09 ,  G02F1/33 ,  G11B7/127 ,  H01S3/00 ,  B82Y10/00

CPC classification number: H01S3/0057 ,  B23K26/0624 ,  B23K26/08 ,  B23K26/082 ,  B23K26/083 ,  G02B5/3083 ,  G02B26/0808 ,  G02B27/0944 ,  G02F1/33 ,  B82Y10/00

Abstract: A method of delivering optical pulses to a substrate comprises directing a focused beam from a source of optical pulses along a propagation direction onto a substrate; moving the substrate relative to the beam in a plane substantially orthogonal to the propagation direction and continuously along a first direction that includes spaced apart row locations on the substrate, and delivering a plurality of optical pulses from source as the beam reaches each row location; and between delivering the optical pulses at consecutive row locations, moving the beam relative to the substrate in one or more successive discrete movements along a second direction in the plane orthogonal to the first direction, to direct the beam to one or more spaced apart column locations on the substrate, and delivering a plurality of optical pulses from the source at each column location.