Patents by Inventor Valentin Gapontsev

Valentin Gapontsev has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210159662
    Abstract: A Raman fiber laser source is configured with a feeding fiber delivering MM pump radiation to an inner cladding of double-clad MM Raman fiber laser. The MM pump beam radiation has a sufficient power to produce Raman scattering in the MM Raman fiber converting the pump radiation to a MM signal radiation at a Raman-shifted wavelength ?ram which is longer than a wavelength ?pump of the pump radiation. The Raman laser source further has a pair of spaced reflectors defining therebetween a resonator for the signal radiation at a 1st Stokes wavelength and flanking at least part of the MM core of the Raman fiber which is provided with a central core region which is doped with impurities for enhancing Raman process. The reflectors and central core region are dimensioned to correspond to the fundamental mode of the MM signal radiation which is output from the Raman fiber with an M2 factor ?1.1 and in a power range between a few kW and tens of kW.
    Type: Application
    Filed: May 14, 2018
    Publication date: May 27, 2021
    Inventors: Valentin GAPONTSEV, Igor SAMARTSEV, Nikolai PLATANOV
  • Patent number: 10615570
    Abstract: The inventive laser is configured with a plurality of pigtailed multimode (MM) diode lasers each receiving a direct input current at a room temperature which is maintained to be within a 20-25° C. inside the housing of the laser. The diode lasers each are configured to operate at a desired wavelength in an optimal operational range, in which the diode laser operates with a WPE range between 63% and 75%. The direct current inputted in each diode laser is selected to be below a threshold at an efficiency curve of the diode laser after which the efficiency of the diode laser starts decreasing while an output power of the diode laser continues to increase. The laser is further configured with a fiber gain block having an active fiber medium which is pumped with the cumulative pump output and operative to emit a laser output in a power range between hundreds of watts and tens and even hundreds of kilowatts at the desired wavelength in an optimal operation range.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: April 7, 2020
    Assignee: IPG PHOTONICS CORPORATION
    Inventors: Valentin Gapontsev, Valentin Fomin, Eugene Scherbakov, Alex Ovtchinnikov, Anton Ferin, Andrey Abramov
  • Patent number: 10520790
    Abstract: A single-mode (SM) Green fiber laser is configured to operate in a Green spectral range in a continuous-wave (CW) or quasi-continuous-wave (QCW) mode. The Green laser is configured with a pump source, outputting narrow-linewidth pump light at a fundamental wavelength in one (1) micrometer spectral range, and a single-pass second harmonic generator (SHG), such as a nonlinear LBO crystal, frequency doubling the pump light to output Green light at a signal wavelength. The pump light source is configured to have a MOPFA configuration with a SM seed which emits the SM pump light with a linewidth narrower than 0.2 nm, and at least one ytterbium (“Yb”) fiber amplifier receiving and amplifying the SM pump light at the fundamental wavelength while maintaining the linewidth narrower than 0.2 nm. The SM Green fiber laser operates with a wall plug efficiency between 15% and 30% in a 510-540 nm signal wavelength range and a power range between about 50 W and kW-levels.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: December 31, 2019
    Assignee: IPG PHOTONICS CORPORATION
    Inventors: Valentin Gapontsev, Igor Samartsev, Alexey Avdokhin
  • Patent number: 10483709
    Abstract: The present invention provides systems and methods for producing short laser pulses that are amplified and spectrally broadened in a bulk gain media. The bulk material, having laser gain and nonlinear properties, is concurrently exposed to an optical pump input and a seed input, the pump power being sufficient to amplify and spectrally broaden the seed pulse.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: November 19, 2019
    Assignee: IPG PHOTONICS CORPORATION
    Inventors: Igor Moskalev, Sergey Vasilyev, Michael Mirov, Valentin Gapontsev
  • Publication number: 20190326723
    Abstract: A high average and peak power single transverse mode laser system is operative to output ultrashort single mode (SM) pulses in femtosecond-, picosecond- or nanosecond-pulse duration range at a kW to MW peak power level. The disclosed system deploys master oscillator power amplifier configuration (MOPA) including a SM fiber seed, outputting a pulsed signal beam at or near 1030 nm wavelength, and a Yb crystal booster. The booster is end-pumped by a pump beam output from a SM or low-mode CW fiber laser at a pump wavelength in a 1000-1020 nm wavelength range so that the signal and pump wavelengths are selected to have an ultra-low-quantum defect of less than 3%.
    Type: Application
    Filed: December 1, 2017
    Publication date: October 24, 2019
    Inventors: Alex DERGACHEV, Igor SAMARTSEV, Valentin GAPONTSEV
  • Publication number: 20190305513
    Abstract: The inventive laser is configured with a plurality of pigtailed multimode (MM) diode lasers each receiving a direct input current at a room temperature which is maintained to be within a 20-25° C. inside the housing of the laser. The diode lasers each are configured to operate at a desired wavelength in an optimal operational range, in which the diode laser operates with a WPE range between 63% and 75%. The direct current inputted in each diode laser is selected to be below a threshold at an efficiency curve of the diode laser after which the efficiency of the diode laser starts decreasing while an output power of the diode laser continues to increase. The laser is further configured with a fiber gain block having an active fiber medium which is pumped with the cumulative pump output and operative to emit a laser output in a power range between hundreds of watts and tens and even hundreds of kilowatts at the desired wavelength in an optimal operation range.
    Type: Application
    Filed: December 2, 2014
    Publication date: October 3, 2019
    Inventors: Valentin Gapontsev, Valentin Fomin, Eugene Scherbakov, Alex Ovtchinnikov, Anton Ferin, Andrey Abramov
  • Publication number: 20190291208
    Abstract: The disclosed laser-based method for pipeline installation includes of forming coronal formations on opposite wall ends of each pipe, continuously interengaging the corona formations of adjacent pipelines and welding a joint between the corona formations unto the desired pipeline length is reached. In particular, the disclosure relates to a pipe connection system including recessed wall ends of respective adjacent pipe segments which are enmeshed with each other to form a corona-like joint, and a laser system operative to weld the corona-like joint.
    Type: Application
    Filed: November 13, 2017
    Publication date: September 26, 2019
    Inventors: Andrey USHAKOV, Nikolay GREZEV, Valentin GAPONTSEV
  • Publication number: 20190163032
    Abstract: A single-mode (SM) Green fiber laser is configured to operate in a Green spectral range in a continuous-wave (CW) or quasi-continuous-wave (QCW) mode. The Green laser is configured with a pump source, outputting narrow-linewidth pump light at a fundamental wavelength in one (1) micrometer spectral range, and a single-pass second harmonic generator (SHG), such as a nonlinear LBO crystal, frequency doubling the pump light to output Green light at a signal wavelength. The pump light source is configured to have a MOPFA configuration with a SM seed which emits the SM pump light with a linewidth narrower than 0.2 nm, and at least one ytterbium (“Yb”) fiber amplifier receiving and amplifying the SM pump light at the fundamental wavelength while maintaining the linewidth narrower than 0.2 nm. The SM Green fiber laser operates with a wall plug efficiency between 15% and 30% in a 510-540 nm signal wavelength range and a power range between about 50 W and kW-levels.
    Type: Application
    Filed: January 6, 2015
    Publication date: May 30, 2019
    Inventors: Valentin Gapontsev, Igor SAMARTSEV, Alexey AVDOKHIN
  • Patent number: 10293432
    Abstract: A hand displaceable laser welding gun is configured with an elongated support column extending along a longitudinal axis and made from lightweight material. A support plate is displaceably mounted to the column while supporting thereon an optical head axially which is provided with optics. The optics is configured to direct a laser beam along a path towards a welding zone through a protective window of the optical head. The laser welding gun further is structured with a first arm mounted to the support plate and extending along a longitudinal axis of the gun diametrically opposite to the optical head. The inner surface of the displaceable arm has an inner surface defining a tunnel which is aligned with the optical head and axially traversed by the laser beam, a first axially flowing stream of pressurized gaseous medium, and a second axially flowing stream of gaseous medium.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: May 21, 2019
    Assignee: IPG PHOTONICS CORPORATION
    Inventors: Valentin Fomin, Anton Starovoytov, Andrey Abramov, Valentin Gapontsev, Artjom Fuchs, Ingo Schramm, Eugene Shcherbakov, Holger Mamerow, Andreas Michalzik
  • Publication number: 20190137403
    Abstract: The disclosed method and handheld analyzer of elemental concentration measurement is based on spectral analysis of high temperature highly ionized plasma generated by laser-generated pulses. Due to a high pulse energy and short pulse duration, high intensity singly and multiply charged ion lines in addition to neutral atomic lines are excited. The pulsed laser source of the disclosed analyzer is configured to output a train of pulses of signal light at a 1.5-1.6 signal wavelength at a pulse repetition rate from 0.1 to 50 kHz, pulses duration from 0.01 to 1.5 ns, pulse energy between 100 and 1000 uJ and has a beam spot on the surface of the sample varying 1 to 60 ?m. The above-described parameters provide at least a 20 GW/cm2 laser power density sufficient to induce a high temperature, highly ionized plasma (plasma) which allows measuring the carbon concentration in carbon steels by employing doubly charged ionic line CII with a detection limit down to 0.
    Type: Application
    Filed: April 11, 2017
    Publication date: May 9, 2019
    Inventors: Valentin GAPONTSEV, Ivan KURATEV, Roman BIRYUKOV, Ekaterina FEDYNA, Sergey PASHKO, Oleg MELOVATSKY, Andrey REZNIKOV, Nadezhda KOVYZHENKO, Dmitri OULIANOV
  • Patent number: 10216063
    Abstract: Systems and methods for spectrally broadening seed pulses with a single pass laser amplifier are disclosed. A bulk TM:II-VI polycrystalline material with combined gain and nonlinear characteristic provides passive (cold) spectral broadening of high power seed pulses. Continuous pumping provides more significant spectral broadening. In particular, pulsed pumping of TM:II-VI polycrystalline material (e.g. Cr2+:ZnS, Cr2+:ZnSe, and Cr2+:CdSe) is shown to provide significant spectral broadening to the super continuum generation SCG level. Pulse picking, pump sources, master oscillators and various optical components are described.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: February 26, 2019
    Assignee: IPG PHOTONICS CORPORATION
    Inventors: Sergey Vasilyev, Igor Moskalev, Michael Mirov, Valentin Gapontsev
  • Publication number: 20180278006
    Abstract: The present invention provides systems and methods for producing short laser pulses that are amplified and spectrally broadened in a bulk gain media. The bulk material, having laser gain and nonlinear properties, is concurrently exposed to an optical pump input and a seed input, the pump power being sufficient to amplify and spectrally broaden the seed pulse.
    Type: Application
    Filed: September 22, 2016
    Publication date: September 27, 2018
    Inventors: Igor MOSKALEV, Sergey VASILYEV, Michael MIROV, Valentin GAPONTSEV
  • Publication number: 20180113372
    Abstract: Systems and methods for spectrally broadening seed pulses with a single pass laser amplifier are disclosed. A bulk TM:II-VI polycrystalline material with combined gain and nonlinear characteristic provides passive (cold) spectral broadening of high power seed pulses. Continuous pumping provides more significant spectral broadening. In particular, pulsed pumping of TM:II-VI polycrystalline material (e.g. Cr2+:ZnS, Cr2+:ZnSe, and Cr2+:CdSe) is shown to provide significant spectral broadening to the super continuum generation SCG level. Pulse picking, pump sources, master oscillators and various optical components are described.
    Type: Application
    Filed: September 30, 2016
    Publication date: April 26, 2018
    Inventors: Sergey VASILYEV, Igor MOSKALEV, Michael MIROV, Valentin GAPONTSEV
  • Patent number: 9921168
    Abstract: The disclosure is a method and system for monitoring the condition of an optical protective component in a laser system associated with a data processor. In one embodiment, the method begins with directing light from the process head of a laser through the optical protective component onto a workpiece. A return light via the workpiece causes light signals coupled through the protective component and into to a fiber which extends proximate the protective component and thereafter flexibly to a sensor. The sensed signals allow monitoring the condition of the protective component during use. The method and system is operative for use with optical protective elements downstream of the process head.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: March 20, 2018
    Assignee: IPG PHOTONICS CORPORATION
    Inventors: Valentin Gapontsev, Yuri Grapov, Michael Digiantommaso
  • Patent number: 9882341
    Abstract: A high power fiber laser system is configured with a pump cascade and a laser cascade. The pump cascade includes a fiber amplifier provided with a MM core which is doped with ions of rare-earth element including either Er or Yb/Er. The MM core of fiber amplifier is configured with a double bottleneck-shaped cross section. The laser cascade has a fiber laser configured with a core which is doped with Tm ions. The pump light generated by the amplifier is coupled into the upstream end of the Tm laser.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: January 30, 2018
    Assignee: IPG PHOTONICS CORPORATION
    Inventors: Valentin Gapontsev, Fedor Shcherbina, Andrey Mashkin
  • Patent number: 9667023
    Abstract: A high power fiber laser system includes a booster winch is configured as a fiber amplifier extending over free space, pump source and laser head including a reflective element which receives pump light and reflects toward the output end of the booster in a counter signal-propagating direction. The booster is configured with concentric and coextending frustoconically shaped (“MM”) core and cladding around the core. The core includes a mode transition region expanding between small diameter SM input and large diameter MM output core ends and configured so that amplification of high order modes is substantially suppressed as a single mode (“SM”) signal light propagates from the input to output core ends. The laser head receives output ends of respective pump light delivery fibers and signal fiber, respectively. The pump source is structured with a plurality of independent sub pumps arranged around the booster.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: May 30, 2017
    Assignee: IPG Photonics Corporation
    Inventors: Valentin Fomin, Anton Ferin, Mikhail Abramov, Igor Samartsev, Valentin Gapontsev
  • Publication number: 20160372884
    Abstract: A fiber Raman laser is configured with a microstructured double clad passive fiber which has an inner cladding receiving and guiding a high intensity pump light. The double-clad passive fiber farther has a eon surrounded by the inner cladding and an outer cladding. An arrangement of air holes is configured to define the inner, waveguiding cladding so that an NA of the latter varies between about 0.25-0.9 allowing this to reduce the diameter of the inner cladding. The passive fiber is characterized by a substantial overlap between the pump light and 1st stokes in the care and further includes an absorber operative to substantially suppress the signal light at the 2nd strokes so that the Ge-doped fiber outputs a SM, bright radiation at up to kW levels.
    Type: Application
    Filed: December 27, 2013
    Publication date: December 22, 2016
    Applicant: IPG Photonics Corporation
    Inventors: Valentin Gapontsev, Nikolai Platanov, Alexander Yusim
  • Publication number: 20160294149
    Abstract: A short-pulse mode-locked laser is configured with at least two reflective elements defining a resonant cavity therebetween, a laser gain element (“GE”) placed inside the resonant cavity at normal incidence and selected from transition metal doped II-VI materials; and an optical pump emitting pulsed output to synchronously or quasi-synchronously pump the GE at a pulse repetition rate frequency fpump, the pump being configured so that the fpump substantially matches an inversed round trip time in the resonant cavity flaser:fpump?flaser=c/2L, where c is the speed of light, L is the length of the resonant cavity. The synchronous or quasi-synchronous pumping triggers and sustains a short-pulse emission of the laser with picosecond or femtosecond pulse durations.
    Type: Application
    Filed: March 30, 2016
    Publication date: October 6, 2016
    Inventors: Sergey VASILYEV, Michael MIROV, Valentin GAPONTSEV
  • Publication number: 20160285228
    Abstract: A high power single mode (“SM”) laser system includes an amplifier configured with a monolithic fiber to rod fiber waveguide which is structured with a multimode (“MM”) core and at least one cladding surrounding the core. The MM core is configured with a small diameter uniform input region receiving and guiding a SM signal light, a mode-transforming frustoconical core region expanding outwards from the input region and a relatively large diameter uniform output portion. The high power laser system is further structured with a MM pump light delivery fiber having a numerical aperture NA2, which is at most equal to that one of the output core portion. The amplifier and pump light output fiber traverse an unconfined delivery cable and terminate upstream from a mirror which is configured to focus the incident pump light into the core of the amplifier in a counter-propagating direction.
    Type: Application
    Filed: March 6, 2014
    Publication date: September 29, 2016
    Applicant: IPG Photonics Corporation
    Inventors: Valentin Gapontsev, Igor Samartsev, Dimitri Yagodkin
  • Publication number: 20160282553
    Abstract: An optical fiber includes a monolithic elongated mosaic core having a longitudinal axis and configured with a silica-based medium with a uniform refractive index, and a plurality of coaxial elongated individual elements which do not waveguide light at a given wavelength and are received in the silica-glass medium. The refractive indices of the medium and individual anti- waveguiding elements together determine a cumulative effective refractive index of the mosaic core. The optical fiber further includes at least one cladding surrounding the mosaic core and provided with a cladding refractive index which is lower than the index of the mosaic core, so that the mosaic core waveguides the light at the given wavelength.
    Type: Application
    Filed: May 26, 2016
    Publication date: September 29, 2016
    Inventors: Valentin GAPONTSEV, Igor SAMARTSEV