公开(公告)号：US20160359288A1

公开(公告)日：2016-12-08

申请号：US15240442

申请日：2016-08-18

Applicant: FUJIKURA LTD.

Inventor： Yuji Matsuoka

IPC: H01S3/00 ,  G01J1/44 ,  H01S3/23 ,  G02B6/28 ,  H01S3/067 ,  G01J1/42 ,  G02B6/42

CPC classification number: H01S3/0014 ,  G01J1/4257 ,  G01J1/44 ,  G02B6/2804 ,  G02B6/4286 ,  H01S3/067 ,  H01S3/0675 ,  H01S3/094011 ,  H01S3/09408 ,  H01S3/1305 ,  H01S3/2383

Abstract: To provide a fiber laser apparatus capable of detecting a failure of an optical fiber within a wide range of the apparatus with an inexpensive configuration. The fiber laser apparatus 100 has a plurality of fiber laser units 110, a combiner 120 operable to optically combine output laser beams outputted from the fiber laser unit 110 to generate a combined laser beam, a laser emission portion 130 operable to emit the combined laser beam, output laser beam power detection parts 170 operable to detect a power of an output laser beam of each of the fiber laser units 110, a combined laser beam power detection part 140 operable to detect a power of the combined laser beam, and a failure detection part 160 operable to compare the total of detected powers of the output laser beams (total laser beam power) with the detected power of the combined laser beam and determine that a failure has occurred in the fiber laser unit 110 when a ratio of the power of the combined laser beam to the total laser beam power becomes lower than a predetermined threshold T.

Abstract translation: 提供一种光纤激光装置，其能够以廉价的结构检测该装置的宽范围内的光纤的故障。 光纤激光装置100具有多个光纤激光器单元110，组合器120可操作以光学地组合从光纤激光单元110输出的输出激光束以产生组合的激光束;激光发射部分130，其可操作地发射组合的激光束 输出激光束功率检测部分170，其可操作以检测每个光纤激光器单元110的输出激光束的功率;组合激光束功率检测部分140，其可操作以检测组合的激光束的功率;以及故障检测 部分160可操作以将输出激光束的检测功率（总激光束功率）的总和与组合的激光束的检测功率进行比较，并且确定当光纤激光单元110的功率的比率 组合的激光束相对于总激光束功率变得低于预定阈值T.

公开(公告)号：US11362477B2

公开(公告)日：2022-06-14

申请号：US16651646

申请日：2017-09-29

Applicant: FUJIKURA LTD.

Inventor： Yuji Matsuoka

IPC: H01S3/067 ,  B23K26/064 ,  H01S3/102 ,  H01S3/23 ,  H01S3/094 ,  H01S3/0941

Abstract: A fiber laser system, includes: N fiber laser units that generates respective laser beams, where N≥2; an output combiner that: combines the respective laser beams, and generates output light including, as the respective laser beams, laser beams different from each other in terms of NA power cumulative distribution; and a control unit that sets a power of each of the respective laser beams such that an upper limit NA corresponding to each of not more than (N−1) predetermined power cumulative rate(s) is equal to a specified value for the output light.

公开(公告)号：US20220152731A1

公开(公告)日：2022-05-19

申请号：US17434303

申请日：2020-03-10

Applicant: FUJIKURA LTD.

Inventor： Yuji Matsuoka ,  Akira Sakamoto

IPC: B23K26/0622 ,  B23K26/06 ,  B23K26/70

Abstract: A laser processing apparatus includes a process laser light source, a first optical system, a pulse laser light source, a second optical system, and an optical detection portion. The process laser light source generates a process laser beam having a continuous energy density during a certain period of time. The first optical system directs the process laser beam to a surface of a workpiece. The pulse laser light source generates a pulse laser beam having an energy density with a peak value that is higher than the energy density of the process laser beam. The second optical system directs the pulse laser beam to a process portion of the workpiece. The optical detection portion detects plasma light produced at the process portion of the workpiece.

公开(公告)号：US20210021092A1

公开(公告)日：2021-01-21

申请号：US16651646

申请日：2017-09-29

Applicant: FUJIKURA LTD.

Inventor： Yuji Matsuoka

IPC: H01S3/067 ,  B23K26/064

Abstract: A fiber laser system, includes: N fiber laser units that generates respective laser beams, where N≥2; an output combiner that: combines the respective laser beams, and generates output light including, as the respective laser beams, laser beams different from each other in terms of NA power cumulative distribution; and a control unit that sets a power of each of the respective laser beams such that an upper limit NA corresponding to each of not more than (N−1) predetermined power cumulative rate(s) is equal to a specified value for the output light.

公开(公告)号：US09985407B2

公开(公告)日：2018-05-29

申请号：US15240442

申请日：2016-08-18

Applicant: FUJIKURA LTD.

Inventor： Yuji Matsuoka

IPC: H01S3/00 ,  H01S3/23 ,  G01J1/42 ,  G01J1/44 ,  G02B6/28 ,  G02B6/42 ,  H01S3/067

CPC classification number: H01S3/0014 ,  G01J1/4257 ,  G01J1/44 ,  G02B6/2804 ,  G02B6/4286 ,  H01S3/067 ,  H01S3/0675 ,  H01S3/094011 ,  H01S3/09408 ,  H01S3/1305 ,  H01S3/2383

Abstract: To provide a fiber laser apparatus capable of detecting a failure of an optical fiber within a wide range of the apparatus with an inexpensive configuration. The fiber laser apparatus 100 has a plurality of fiber laser units 110, a combiner 120 operable to optically combine output laser beams outputted from the fiber laser unit 110 to generate a combined laser beam, a laser emission portion 130 operable to emit the combined laser beam, output laser beam power detection parts 170 operable to detect a power of an output laser beam of each of the fiber laser units 110, a combined laser beam power detection part 140 operable to detect a power of the combined laser beam, and a failure detection part 160 operable to compare the total of detected powers of the output laser beams (total laser beam power) with the detected power of the combined laser beam and determine that a failure has occurred in the fiber laser unit 110 when a ratio of the power of the combined laser beam to the total laser beam power becomes lower than a predetermined threshold T.