公开(公告)号：WO2022093327A1

公开(公告)日：2022-05-05

申请号：PCT/US2021/036332

申请日：2021-06-08

Applicant: IPG PHOTONICS CORPORATION

Inventor： GLEBOV, Leonid ,  DIVLIANSKY, Ivan ,  MHIBIK, Oussama ,  SHIRSHNEVA, Elena ,  SMIRNOV, Vadim

IPC: G02B27/10 ,  G02B27/42 ,  G02B6/293

Abstract: A spectral beam combiner includes at least one transmitting volume chirped Bragg grating (TVCBG) which 1, diffracts a first broadband beam propagating at one central wavelength, which satisfies the Bragg condition, and incident on the TVCBG at one of (+) (-) Bragg angles, and 2. transmits at least one second broadband beam propagating at a second central wavelength, which does not satisfy the Bragg condition. The second broadband beam is incident on the TVCBG at the Bragg angle which is opposite to the one Bragg angle of the first broadband beam. The TVCBG is configured to eliminate divergence of the first broadband beam, which is resulted from dispersion of the one TVCBG, in a plane of diffraction, and combine the first diffracted and second transmitted broadband beams into a first single high-power collimated broadband output beam.

公开(公告)号：WO2020131797A1

公开(公告)日：2020-06-25

申请号：PCT/US2019/066731

申请日：2019-12-17

Applicant: IPG PHOTONICS CORPORATION

Inventor： BUABBUD, George ,  SAMARTSEV, Igor ,  GLEBOV, Leonid

IPC: H01S5/12 ,  H01S5/14

Abstract: An external cavity diode laser (ECDL) tunable to a plurality of channels of any selected grid is configured with a volume Bragg grating (VBG) and a continuous wave (CW) chip. In accordance with aspect of the disclosure, the VBG is configured as a chirped volume bragg mirror (CVBM) provided with a chirp of the grating period which is selected to compensate for a phase shift upon switching to a new desired wavelength. The desired wavelength is selected by using a Vernier effect between two tunable FP etalons.

公开(公告)号：WO2022093326A1

公开(公告)日：2022-05-05

申请号：PCT/US2021/036330

申请日：2021-06-08

Applicant: IPG PHOTONICS CORPORATION

Inventor： GLEBOV, Leonid ,  DIVLIANSKY, Ivan ,  MHIBIK, Oussama ,  SHIRSHNEVA, Elena ,  SMIRNOV, Vadim

IPC: G02B27/10

Abstract: A beam combiner configured to spectrally combine multiple beams includes at least one pair of identically configured TVBGs. The TVBGs are spaced apart along a light path and aligned at respective "+" and "-" Bragg angles. The upstream TVBGs diffracts a first beam, which is incident thereon at one of the Bragg angles, so that spectral components of this beams diverge from one another defining thus a fan-shaped beam at the output of the upstream TVBG. Upon launching the diffracted first beam to the downstream TVBG at the other Bragg angle, its spectral components again are diffracted but in the direction opposite to that provided by the upstream TVBG. Thus, the dispersion effects in respective TVBGs cancel out each other. Another beam is incident on and transmitted by the downstream TVBG which combines the twice diffracted and transmitted beams into a collimated combined beam.

公开(公告)号：WO2021158774A1

公开(公告)日：2021-08-12

申请号：PCT/US2021/016588

申请日：2021-02-04

Applicant: IPG PHOTONICS CORPORATION

Inventor： GLEBOV, Leonid ,  DIVLIANSKY, Ivan ,  MHIBIK, Oussama ,  SMIRNOV, Vadim

IPC: G02B27/10 ,  G02B5/18 ,  G02B5/32 ,  G02B6/293

Abstract: A method includes selecting a period for a volume Bragg grating (VBG) such that a spectral selectivity of the VBG is at least as wide as a spectral width of a broadband light beam that is to be spatially transformed, selecting a desired beam transformation for the broadband light beam, passing a first light beam from a recording light source through an optical device to a volume holographic recording medium where the optical device is configured to induce the desired beam transformation, directing a second light beam from the recording light source to the recording medium, and converging the first light beam and the second beam at a recording angle such that a spatial refractive index modulation profile is recorded in the recording medium that provides the VBG with the selected period, and a phase profile is embedded in the VBG that induces the desired beam transformation for each spectral component within a spectral width of the VBG.

公开(公告)号：WO2022187728A1

公开(公告)日：2022-09-09

申请号：PCT/US2022/019088

申请日：2022-03-07

Applicant: IPG PHOTONICS CORPORATION

Inventor： DIVLIANSKY, Ivan ,  GLEBOV, Leonid ,  MACH, Lam ,  MHIBIK, Oussama ,  MOHAMMADDIAN, Nafiseh

IPC: H01S3/105 ,  H01S3/08

Abstract: This invention is a broadband intra cavity laser mode convertor. This is a hologram of a complex phase mask imprinted inside of a volume Bragg grating with wide spectral width recorded in photo-thermo-refractive (PTR) glass. This hologram is a broadband phase converting monolithic device capable of use over a broad wavelength range at high instant and average power because of low absorption coefficient and low nonlinear refractive index of PTR glass. Therefore, it can be used for broadband optical beam transformations and conversion of modes in laser resonators.