公开(公告)号：US12092848B2

公开(公告)日：2024-09-17

申请号：US16660742

申请日：2019-10-22

Applicant: Ilya M. Vitebskiy ,  Andrey Chabanov ,  Igor Anisimov ,  Nicholaos Limberopoulos ,  Carl Pfeiffer

Inventor： Ilya M. Vitebskiy ,  Andrey Chabanov ,  Igor Anisimov ,  Nicholaos Limberopoulos ,  Carl Pfeiffer

IPC: G01J3/26 ,  G02B5/30 ,  G02F1/09 ,  H01Q15/24

CPC classification number: G02B5/3041 ,  G02F1/093 ,  G01J3/26 ,  G02B5/3016 ,  G02B5/305 ,  G02B5/3058 ,  H01Q15/24

Abstract: A layered sheet polarizer including a multilayered structure having multiple transparent, low-absorption layers, the transparent, low-absorption layers including first layers having a relatively high index of refraction and second layers having a relatively low index of refraction, the first and second layers being arranged in an alternating manner within the structure so as to form resonator structures, and a dichroic layer positioned within the multilayered structure.

公开(公告)号：US11988909B2

公开(公告)日：2024-05-21

申请号：US16996238

申请日：2020-08-18

Applicant: TRUMPF Lasersystems for Semiconductor Manufacturing GmbH

Inventor： Steffen Erhard

IPC: G02F1/09 ,  G02B1/12

CPC classification number: G02F1/093 ,  G02F1/091 ,  G02B1/12

Abstract: A Faraday rotator includes: a disk-shaped magneto-optical solid-state medium, a magnet generator configured to generate a magnetic field in the magneto-optical solid-state medium, a heat sink with a support surface for the magneto-optical solid-state medium, a reflector mounted between the heat sink and the magneto-optical solid-state medium and configured to reflect a laser beam entering the magneto-optical solid-state medium in a first impingement region on a first side of the magneto-optical solid-state medium facing away from the support surface, and a deflector configured to deflect the laser beam emerging from the magneto-optical solid-state medium back to a second impingement region at least partly overlapping with the first impingement region on the first side. An optical isolator can have at least one such Faraday rotator. A driver laser arrangement can have at least one such optical isolator. An EUV radiation generation apparatus can have such a driver laser arrangement.

公开(公告)号：US11971617B2

公开(公告)日：2024-04-30

申请号：US17048117

申请日：2019-03-07

Applicant: NIPPON ELECTRIC GLASS CO., LTD.

Inventor： Futoshi Suzuki

IPC: G02F1/09 ,  C03C3/15 ,  C03C4/00 ,  G02B27/28

CPC classification number: G02F1/093 ,  C03C3/15 ,  C03C4/00 ,  G02B27/28 ,  G02F2202/09

Abstract: A Faraday rotator includes a magnetic circuit including first to third magnetic materials each provided with a through hole through which light passes, and a Faraday element disposed in the through hole. When a direction where light passes through the through hole is defined as a direction of an optical axis, the first magnetic material is magnetized in a direction perpendicular to the direction of the optical axis, the second magnetic material is magnetized in a direction parallel to the direction of the optical axis, and the third magnetic material is magnetized in a direction perpendicular to the direction of the optical axis, and a length of the Faraday element along the direction of the optical axis is shorter than a length of the second magnetic material along the direction of the optical axis.

公开(公告)号：US20240103305A1

公开(公告)日：2024-03-28

申请号：US18531775

申请日：2023-12-07

Applicant: Gigaphoton Inc.

Inventor： Atsushi FUCHIMUKAI

IPC: G02F1/09 ,  H01S3/10

CPC classification number: G02F1/093 ,  H01S3/10061

Abstract: An optical isolator includes an enclosure, a first polarizer disposed in the enclosure, a first Faraday rotator including a first Faraday material rotating a polarization direction of the light having passed through the first polarizer, and a first magnet producing a first magnetic field applied to a first magnetic field generation region where the first Faraday material is disposed, the first Faraday rotator disposed in the enclosure, and a first position adjustment mechanism moving the first Faraday material relative to the enclosure. A cross-sectional shape of the first Faraday material in a cross section perpendicular to an optical axis of the light passing through the first Faraday material and a cross-sectional shape of the first magnetic field generation region have major axes in the same direction. The first position adjustment mechanism moves the first Faraday material in the direction of a minor axis perpendicular to the major axis.

公开(公告)号：US11719965B2

公开(公告)日：2023-08-08

申请号：US17123623

申请日：2020-12-16

Applicant: Lightel Technologies, Inc.

Inventor： Shyh-Chung Lin ,  Hongyu Hu

IPC: G02F1/09 ,  G02B5/30 ,  G02B27/30 ,  G02B27/28

CPC classification number: G02F1/093 ,  G02B5/3083 ,  G02B27/283 ,  G02B27/30

Abstract: An optical isolator device with minimized polarization mode dispersion includes a first polarization splitter/combiner, a non-reciprocal polarization rotator and a second polarization splitter/combiner. Only forward propagation of light is allowed to propagate in the device, with backward optical signal blocked due to non-reciprocal polarization rotation. The optical paths of o-ray and e-ray are arranged to achieve equal optical path lengths, which makes polarization mode dispersion minimal to nonexistent. When symmetrically configured, both polarization mode dispersion (PMD) and polarization dependent loss (PDL) become zero in principle.

公开(公告)号：US11693264B2

公开(公告)日：2023-07-04

申请号：US16684599

申请日：2019-11-15

Applicant: Shin-Etsu Chemical Co., Ltd.

Inventor： Toshiaki Watanabe

IPC: G02F1/00 ,  G04B35/00 ,  C04B35/01 ,  C04B35/505 ,  C30B29/16 ,  G02F1/09 ,  G02F1/095 ,  C04B35/50 ,  G02F1/35

CPC classification number: G02F1/0036 ,  C04B35/01 ,  C04B35/50 ,  C04B35/505 ,  C30B29/16 ,  G02F1/093 ,  G02F1/0955 ,  C04B2235/3225 ,  G02F1/3501 ,  G02F1/3503 ,  G02F1/3505

Abstract: A Faraday rotator and an optical isolator having a high transmittance and a high Verdet constant are provided. The optical isolator includes at least a Faraday rotator that rotates a polarization plane of incident light in a non-reciprocal manner, a polarizer disposed on a light incident side of the Faraday rotator, and an analyzer disposed on a light exit side of the Faraday rotator. The Faraday rotator is made of an oxide containing ytterbium oxide (Yb2O3), and is manufactured by a ceramic manufacturing process, wherein the oxide is allowed to contain an oxide of a metal other than ytterbium, and the proportion of ytterbium in all metal atoms in the oxide is 80% or more.

公开(公告)号：US20230168525A1

公开(公告)日：2023-06-01

申请号：US17920853

申请日：2021-06-02

Applicant: NIPPON ELECTRIC GLASS CO., LTD.

Inventor： Futoshi SUZUKI

IPC: G02F1/09 ,  H01F7/02

CPC classification number: G02F1/093 ,  H01F7/02

Abstract: Provided is a magnetic circuit which, with the use in an optical isolator, is less likely to cause the polarizer to be damaged even with higher laser output power. A magnetic circuit 1 includes first to third magnets 11 to 13 each provided with a through hole allowing light to pass through and is composed of the first to third magnets 11 to 13 arranged coaxially in this order in a front-to-rear direction, wherein one of the first and third magnets 11 and 13 is magnetized in a direction Y perpendicular to a direction X of an optical axis to have a north pole located toward the through hole 2, the other of the first and third magnets 11 and 13 is magnetized in a direction Y perpendicular to the direction X of the optical axis to have a south pole located toward the through hole 2, the second magnet 12 is magnetized in a direction parallel to the direction X of the optical axis to have a north pole located toward the one of the first and third magnets 11 and 13 having the north pole located toward the through hole 2, and a length L1 of the first magnet 11 along the direction X of the optical axis is different from a length L3 of the third magnet 13 along the direction X of the optical axis.

公开(公告)号：US20190212585A1

公开(公告)日：2019-07-11

申请号：US16299512

申请日：2019-03-12

Applicant: Shin-Etsu Chemical Co., Ltd.

Inventor： Shinji Makikawa ,  Shinji Aoki ,  Yoshihiro Nojima

IPC: G02F1/00 ,  C04B35/50 ,  G02F1/09 ,  G02B27/28 ,  C04B35/63 ,  C04B35/626 ,  C01F17/00 ,  C04B35/645 ,  C04B35/505 ,  C04B35/64

CPC classification number: G02F1/0036 ,  C01F17/00 ,  C04B35/50 ,  C04B35/505 ,  C04B35/6264 ,  C04B35/6303 ,  C04B35/64 ,  C04B35/645 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/60 ,  C04B2235/9653 ,  G02B27/28 ,  G02F1/09 ,  G02F1/093

Abstract: A starting material powder, which contains a rare earth oxide that is composed of terbium oxide and at least one other rare earth oxide selected from among yttrium oxide, scandium oxide and oxides of lanthanide rare earth elements (excluding terbium) and a sintering assistant that is formed of an oxide of at least one element selected from among group 2 elements and group 4 elements, is produced by having (a) terbium ions, (b) ions of at least one other rare earth element selected from among yttrium ions, scandium ions and lanthanide rare earth ions (excluding terbium ions) and (c) ions of at least one element selected from among group 2 elements and group 4 elements coprecipitate in an aqueous solution containing the components (a)-(c), then filtering and separating the coprecipitate, and subjecting the separated coprecipitate to thermal dehydration.

公开(公告)号：US20180107016A1

公开(公告)日：2018-04-19

申请号：US15844054

申请日：2017-12-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Min Zhou ,  Enyu Zhou ,  Zhenxing Liao

IPC: G02B27/30 ,  G02B3/04 ,  G02B27/28 ,  G02F1/09 ,  G02B27/09 ,  G02B6/42

CPC classification number: G02B27/30 ,  G02B3/04 ,  G02B5/30 ,  G02B6/2746 ,  G02B6/4206 ,  G02B6/4208 ,  G02B6/4213 ,  G02B6/4215 ,  G02B6/4263 ,  G02B27/0927 ,  G02B27/286 ,  G02F1/0036 ,  G02F1/09 ,  G02F1/093

Abstract: A collimation lens and an optical module of the collimation lens. The collimation lens includes a front convex aspheric lens, a first polarizing filter, a Faraday rotation (FR) crystal, a second polarizing filter, and a rear convex aspheric lens. The front convex aspheric lens is coupled to a first end face of the collimation lens, and the rear convex aspheric lens is coupled to a second end face of the collimation lens. The first polarizing filter is coupled between the front convex aspheric lens and the FR crystal, and the second polarizing filter is coupled between the FR crystal and the rear convex aspheric lens.

公开(公告)号：US09933637B2

公开(公告)日：2018-04-03

申请号：US15501602

申请日：2015-03-27

Applicant: SHINKOSHA CO., LTD.

Inventor： Yuzo Ochi ,  Kentaro Oguchi ,  Shoji Kubomura

IPC: H05K7/20 ,  G02F1/01 ,  G02F1/09 ,  F28F13/00

CPC classification number: G02F1/0102 ,  F28F13/00 ,  F28F2013/005 ,  F28F2275/06 ,  G02F1/093

Abstract: The present invention includes a holding stay made of a heat conductive material that is the same as that of an isolator holder, the holding stay being in contact with a radiation stay made of a member having good thermal conductivity, the radiation stay being in contact with radiation fins extracted from the inside of the isolator holder through an external opening for extraction, columnar welded portions bond the holding stay and the isolator holder through openings for welding, the welded portions apply tensile force toward the isolator holder to the radiation stay via the holding stay, and the radiation stay presses the radiation fins by means of the above-described tensile force to be fixed to the isolator holder.