公开(公告)号：US09684125B2

公开(公告)日：2017-06-20

申请号：US15098103

申请日：2016-04-13

Applicant: Coherent, Inc.

Inventor： Michael Hertwig ,  Norman Hodgson ,  Dmitri Simanovski

IPC: G02B6/02 ,  G02B6/024 ,  G02B6/27 ,  A61B18/22

CPC classification number: G02B6/02304 ,  A61B2018/2227 ,  G02B6/024 ,  G02B6/2706 ,  G02B6/2766

Abstract: Plane-polarized laser-radiation from a laser-source is converted to circularly polarized radiation by a quarter-wave plate. The circularly polarized radiation is input into a hollow-core fiber for transport to a point of use. The transported radiation is converted back to plane-polarized radiation by another quarter-wave plate between the fiber and the point of use.

公开(公告)号：US09941654B2

公开(公告)日：2018-04-10

申请号：US14842058

申请日：2015-09-01

Applicant: Coherent, Inc.

Inventor： Andrei Starodoumov ,  Dmitri Simanovski

IPC: H01S3/067 ,  H01S3/16 ,  H01S3/23 ,  H01S3/10 ,  H01S3/11 ,  H01S3/094 ,  H01S3/06 ,  H01S3/08 ,  H01S3/081

CPC classification number: H01S3/06716 ,  H01S3/0604 ,  H01S3/0621 ,  H01S3/08095 ,  H01S3/0817 ,  H01S3/094038 ,  H01S3/094042 ,  H01S3/094084 ,  H01S3/10061 ,  H01S3/1106 ,  H01S3/1618 ,  H01S3/1631 ,  H01S3/1643 ,  H01S3/165 ,  H01S3/1675 ,  H01S3/23 ,  H01S3/2325

Abstract: An apparatus for generating and amplifying laser beams at approximately 1 micrometer wavelength is disclosed. The apparatus includes an ytterbium-doped gain-crystal pumped by an ytterbium fiber-laser. The fiber-laser enables a pump wavelength to be selected that minimizes heating of the gain-crystal. The apparatus can be configured for generating and amplifying ultra-fast pulses, utilizing the gain-bandwidth of ytterbium-doped gain-crystals.

公开(公告)号：US09059564B2

公开(公告)日：2015-06-16

申请号：US14164103

申请日：2014-01-24

Applicant: Coherent, Inc.

Inventor： Dmitri Simanovski ,  Andrei Starodoumov

IPC: H01S3/067 ,  H01S3/1055 ,  H01S3/11 ,  H01S3/08 ,  H01S3/117 ,  H01S3/16

CPC classification number: H01S3/1106 ,  H01S3/067 ,  H01S3/08009 ,  H01S3/0805 ,  H01S3/1118 ,  H01S3/117 ,  H01S3/1618

Abstract: A mode-locked fiber laser has a resonator including a gain-fiber, a mode-locking element, and a spectrally-selective dispersion compensating device. The resonator can be a standing-wave resonator or a traveling-wave resonator. The dispersion compensating device includes only one diffraction grating combined with a lens and a mirror to provide a spatial spectral spread. The numerical aperture of the gain-fiber selects which portion of the spectral spread can oscillate in the resonator.

Abstract translation: 锁模光纤激光器具有包括增益光纤，锁模元件和光谱选择性色散补偿装置的谐振器。 谐振器可以是驻波谐振器或行波谐振器。 色散补偿装置仅包括与透镜和反射镜组合的一个衍射光栅以提供空间光谱扩展。 增益光纤的数值孔径选择频谱扩展的哪一部分可以在谐振器中振荡。

公开(公告)号：US11152757B2

公开(公告)日：2021-10-19

申请号：US16434080

申请日：2019-06-06

Applicant: Coherent, Inc.

Inventor： Norman Hodgson ,  Dmitri Simanovski

IPC: H01S3/11 ,  H01S3/067 ,  H01S3/08 ,  H01S3/10 ,  H01S3/1055

Abstract: A fiber laser producing a beam of ultrashort laser pulses at a repetition rate greater than 200 MHz includes a linear fiber resonator and a fiber branch. Ultrashort laser pulses are generated by passive mode-locking and circulate within the linear fiber resonator. Each circulating laser pulse is split into a portion that continues propagating in the linear fiber resonator and a complementary portion that propagates through the fiber branch and is then returned to the linear fiber resonator. The optical length of the linear fiber resonator is an integer multiple of the optical length of the fiber branch. The repetition rate of the ultrashort laser pulses is the reciprocal of the propagation time of the laser pulses through the fiber branch.

公开(公告)号：US09653867B2

公开(公告)日：2017-05-16

申请号：US14245913

申请日：2014-04-04

Applicant: Coherent, Inc.

Inventor： Dmitri Simanovski ,  Norman Hodgson

IPC: H01S3/00 ,  H01S3/16 ,  H01S3/067 ,  G02B27/10 ,  G02B27/42 ,  H01S3/23 ,  G01J3/14 ,  G01J3/18 ,  G02F1/35 ,  G02F1/365

CPC classification number: H01S3/0057 ,  G01J3/14 ,  G01J3/18 ,  G02B27/1006 ,  G02B27/4244 ,  G02F1/353 ,  G02F1/365 ,  G02F2001/3528 ,  G02F2203/055 ,  G02F2203/255 ,  G02F2203/58 ,  H01S3/005 ,  H01S3/0078 ,  H01S3/0092 ,  H01S3/06758 ,  H01S3/1618 ,  H01S3/2308 ,  H01S2301/08

Abstract: A source of femtosecond pulses at center wavelengths of about 940 nm and about 1140 nanometers (nm) includes a mode-locked fiber MOPA delivering pulses having a center wavelength of about 1040 nm. The 1040-nanometer pulses are spectrally spread into a continuum spectrum extending in range between about 900 nm and about 1200 nm and having well defined side-lobes around the 940-nm and 1140-wavelengths. Radiation is spatially selected from these side-lobes and delivered as the 940-nm and 1140-nm pulses.

公开(公告)号：US09515445B2

公开(公告)日：2016-12-06

申请号：US14958599

申请日：2015-12-03

Applicant: Coherent, Inc.

Inventor： Norman Hodgson ,  Dmitri Simanovski ,  Andrei Starodoumov

IPC: G02B6/00 ,  G02F1/35 ,  H01S3/00 ,  G02B5/10 ,  G02B17/00 ,  G02B17/02 ,  H01S3/067

CPC classification number: H01S3/0092 ,  G02B5/10 ,  G02B17/004 ,  G02B17/023 ,  G02F1/35 ,  G02F1/3511 ,  G02F2001/3528 ,  G02F2001/3542 ,  H01S3/0057 ,  H01S3/0078 ,  H01S3/067 ,  H01S2301/08

Abstract: A mode-locked fiber MOPA delivers pulses of laser-radiation. A super-continuum generator including a bulk spectral-broadening element and a negative group-delay dispersion (NGDD) device is arranged to receive a pulse from the MOPA and cause the pulse to make a predetermined number of sequential interactions with the broadening element and the NGDD device. After making the predetermined interactions, the pulse is delivered from the super-continuum generator with a very broad spectral-bandwidth and a very short duration.

公开(公告)号：US09240663B2

公开(公告)日：2016-01-19

申请号：US14080366

申请日：2013-11-14

Applicant: Coherent, Inc.

Inventor： Norman Hodgson ,  Dmitri Simanovski ,  Andrei Starodoumov

IPC: G02B6/00 ,  G02F1/35 ,  H01S3/00

CPC classification number: H01S3/0092 ,  G02B5/10 ,  G02B17/004 ,  G02B17/023 ,  G02F1/35 ,  G02F1/3511 ,  G02F2001/3528 ,  G02F2001/3542 ,  H01S3/0057 ,  H01S3/0078 ,  H01S3/067 ,  H01S2301/08

Abstract: A mode-locked fiber MOPA delivers pulses of laser-radiation. A super-continuum generator including a bulk spectral-broadening element and a negative group-delay dispersion (NGDD) device is arranged to receive a pulse from the MOPA and cause the pulse to make a predetermined number of sequential interactions with the broadening element and the NGDD device. After making the predetermined interactions, the pulse is delivered from the super-continuum generator with a very broad spectral-bandwidth and a very short duration.

Abstract translation: 锁模光纤MOPA提供激光辐射脉冲。 包括体谱扩展元件和负组延迟色散（NGDD）器件的超连续发生器布置成从MOPA接收脉冲，并使脉冲与扩展元件进行预定数量的顺序相互作用，并且 NGDD设备。 在进行预定的相互作用之后，脉冲从超连续发生器以非常宽的频谱带宽和非常短的持续时间传送。