EP4165736A1 - Kurzpuls-lasersystem - Google Patents
Kurzpuls-lasersystemInfo
- Publication number
- EP4165736A1 EP4165736A1 EP21736977.6A EP21736977A EP4165736A1 EP 4165736 A1 EP4165736 A1 EP 4165736A1 EP 21736977 A EP21736977 A EP 21736977A EP 4165736 A1 EP4165736 A1 EP 4165736A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- laser
- optical system
- laser pulse
- cell
- beam path
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/004—Systems comprising a plurality of reflections between two or more surfaces, e.g. cells, resonators
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/106—Beam splitting or combining systems for splitting or combining a plurality of identical beams or images, e.g. image replication
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3501—Constructional details or arrangements of non-linear optical devices, e.g. shape of non-linear crystals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0057—Temporal shaping, e.g. pulse compression, frequency chirping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0071—Beam steering, e.g. whereby a mirror outside the cavity is present to change the beam direction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0085—Modulating the output, i.e. the laser beam is modulated outside the laser cavity
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0092—Nonlinear frequency conversion, e.g. second harmonic generation [SHG] or sum- or difference-frequency generation outside the laser cavity
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
- H01S3/2383—Parallel arrangements
Definitions
- the invention relates to an optical system with a laser source that generates pulsed laser radiation consisting of a temporal sequence of laser pulses in an input laser beam, a splitting element following the laser source in the beam path, which splits the laser pulses into spatially and / or temporally separated laser pulse replicas , a combination element following the splitting element in the beam path, which superimposes the laser pulse replicas in one laser pulse each in an output laser beam.
- a large number of applications of such systems require a shorter pulse duration than is supported by the amplification medium of the laser system.
- effects in the optical amplifier such as saturation or spectral narrowing (“gain narrowing”), can lead to a decrease in the spectral bandwidth of the laser radiation, which manifests itself in an undesirable increase in the pulse duration at the output of the laser system.
- a well-known approach to shortening the pulse duration is the use of non-linear effects for the coherent generation of new spectral components.
- the corresponding non-linear interactions can occur in the amplification medium (non-linear amplification) or in separate ones Components that are connected downstream of the optical amplifier in the beam path (non-linear pulse compression).
- the most frequently used non-linear interaction of laser radiation with a medium to increase the spectral bandwidth is self-phase modulation (SPM).
- SPM-induced spectral broadening can be implemented in media of the most varied of geometries, eg in optical waveguides (eg in light-conducting fibers).
- SPM is an intensity-dependent effect, which means that in areas of interaction of higher intensity a stronger spectral broadening takes place than in areas of lower intensity.
- a laser beam with a typical Gaussian beam profile experiences a spatially inhomogeneous spectral broadening during propagation through a non-linear medium, e.g. a glass plate.
- the spectral broadening is more pronounced near the beam axis than in the edge areas further away from the beam axis.
- many applications require a spectral bandwidth of the laser pulses that is homogeneous over the beam profile.
- a well-known approach to achieve a spatially homogeneous spectral broadening is the propagation of the laser pulses in waveguides.
- These can be, for example, conventional glass fibers, photonic crystal fibers or hollow core fibers.
- gases noble gases, nitrogen or others
- the propagating self-solution of the laser radiation is in its entirety impressed with the non-linear phase and thus the spectral broadening (see S. Hädrich, H. Carstens, J. Rothhardt, J. Limpert, and A. Tünnermann, "Multi-gigawatt ultrashort pulses at high repetition rate and average power from two-stage nonlinear compression," Opt. Express 19, 7546-7552, 2011).
- glass fiber or hollow core fiber there are different limits with regard to the propagable and thus compressible pulse energy.
- the peak pulse power is limited by the self-focusing; in gas-filled hollow-core fibers, ionization effects typically determine the pulse energy that can be injected.
- Glass fibers are therefore suitable for non-linear pulse compression in the range of a few pJ pulse energy, whereas hollow core fibers allow downstream pulse compression at pulse energies in the mJ range. Due to the negligible dispersion, the hollow-core fiber-based approaches are suitable for pulse compression down to the range of a few oscillation cycles of the electromagnetic field of the laser radiation, which corresponds to a pulse duration that is only supported by an enormous spectral bandwidth.
- a multi-pass cell comprises an arrangement of focusing mirrors that divert a laser beam coupled into the multi-pass cell at each point of reflection, so that the beam propagation is limited to a predefined volume along a controlled propagation path in the multi-pass cell, namely until the laser beam after a number of reflections and so that passes through the volume of the multi-pass cell leaves it again.
- Known designs of multipass cells are referred to as White cells or Herriott cells, for example.
- a multi-pass cell for spatially homogeneous spectral broadening requires that the mirrors of the multi-pass cell are shaped and arranged in such a way that the multi-pass cell forms a stable optical resonator, which is characterized by the fact that Gaussian beams exist as a transversal intrinsic solution of the resonator, which experience the desired spatial homogenization of the spectral broadening as well as transverse intrinsic solutions in non-linear waveguides.
- a dielectric material e.g. a glass plate
- a gas e.g. a noble gas
- the damage threshold of the mirrors that are used to implement the multi-pass cell limits the compressible pulse energy or the pulse peak power that can be coupled into the cell.
- the damage threshold depends on the intensity of the laser radiation.
- the intensity on the mirror surfaces can in principle be reduced by increasing the distance between the mirrors.
- this configuration leads to small foci of the laser radiation, which in turn must be taken into account in the design with regard to the non-linear interaction in the medium.
- the spatially separated amplification enabled new parameter areas to be penetrated (see Marco Kienei, Michael Müller, Arno Klenke, Jens Limpert, and Andreas Tünnermann, "12 mJ kW-class ultrafast fiber laser system using multidimensional coherent pulse addition, "Opt. Lett. 41, 3343-3346, 2016).
- a single laser pulse can be divided into temporally separated laser pulse replicas, propagated temporally separated by intensity-limited components of the laser system and then coherently superimposed again to form a laser pulse in the output laser beam. Both approaches can also be combined.
- the invention based on an optical system of the type specified at the outset in that at least one multipass cell is provided, which is arranged in the beam path between the splitting element and the combination element, through which the laser pulse replicas propagate, the multipass cell containing a medium in which the laser pulse replicas have a experience nonlinear spectral broadening.
- the invention generally understands non-linear spectral broadening to mean the generation of optical power in new spectral ranges by means of non-linear interaction.
- the invention is based on the basic idea of using the concept of beam splitting, ie the generation of spatially and / or temporally separated propagating laser pulse replicas in combination with a homogeneous spectral broadening in a multi-pass cell.
- each laser pulse is converted into a plurality (two or more) of laser pulse replicas, which are then spatially and / or are coupled into the multipass cell temporally separated from one another, propagate (repeatedly) through the medium contained therein and experience a spectral broadening in the process.
- the laser pulse replicas assigned to an original laser pulse are then superimposed again to form a laser pulse in the output laser beam.
- the phase position of the individual laser pulse replicas is of decisive importance.
- the phase position must be such that there is a largely constant and largely constructive interference over time; the phase position can be passively stable or actively stabilized.
- Known approaches can be used here, for example by using a Sagnac interferometer (see Florent Guichard, Yoann Zaouter, Marc Hanna, Franck Morin, Clemens Hönninger, Eric Mottay, Frederic Druon, and Patrick Georges, "Energy scaling of a nonlinear compression setup using passive coherent combining, "Opt. Lett.
- the spatially and / or temporally separated laser pulse replicas preferably propagate through a single multipass cell. It is also conceivable that the spatially separated partial beams propagate through spatially separated multipass cells, each of which is (almost) identical there experience spectral enhancement and then spatially superimposed in the output laser beam.
- a chirp impressed on the laser pulses can be largely removed by using suitable dispersive elements (e.g. chirped mirrors), which ultimately results in the desired shortening of the pulse duration.
- suitable dispersive elements e.g. chirped mirrors
- the splitting element and / or the combination element are each designed as a diffractive beam splitter.
- the dividing element and / or the combination element preferably each include a reflective element with zones of different reflectivity.
- Combination element in each case two element pairs, each consisting of a continuous reflective element and a reflective element with zones of different reflectivity, on which the laser radiation is successively reflected multiple times, the partial beams forming a two-dimensional array in a plane perpendicular to the direction of propagation.
- a compact parallel beam path of the spatially separated partial beams in which the laser pulse replicas propagate can thus be implemented.
- the number of partial beams does not have to match the number of zones of different reflectivity.
- the dividing element and the combination element are expediently constructed identically, so that optical
- the splitting element and the combination element each have at least one beam splitter and at least one optical delay path.
- the laser pulses are guided over optical delay paths of different lengths, so that correspondingly different time delays of the laser pulse replicas result.
- an error signal detector which derives an error signal from the laser radiation, and a controller, which derives from the error signal at least one control signal for controlling at least one optical modulator arranged in the beam path.
- This control loop can advantageously be used for active control of the coherent superposition in the output laser beam.
- the regulation can take place, for example, according to the known LOCSET principle or by sequential phase stabilization (see A. Klenke, M. Müller, H. Stark, A. Tünnermann, and J. Limpert, “Sequential phase locking scheme for a filled aperture intensity coherent combination of beam arrays ", Opt. Express 9, 12072-12080, 2018).
- the optical modulator can have, for example, an array of phase modulators corresponding to the array of the spatially separated partial beams, a phase modulator being assigned to each of the partial beams. Not all elements of the array have to be controlled. Due to the regulated phase position of the partial beams, optical path length differences of the partial beams that occur and, if necessary, fluctuate due to external influences can be actively compensated.
- an arrangement of power control elements is provided in the beam path, each partial beam being assigned a power control element which influences the power of the laser pulses in this partial beam. Due to imperfections in the division of the laser pulses, the individual partial beams can have different intensities. This can be compensated for by the power control elements (e.g. optical attenuators).
- the multi-pass cell expediently has at least two mirrors, the shape and arrangement of which are selected such that the multi-pass cell forms a stable optical resonator.
- a stable optical resonator there is a Gaussian mode as a transverse intrinsic solution, so that the desired spatial homogenization of the spectral broadening occurs.
- the mirrors of the cell can have dielectric layers which have minimal dispersion over a preferably large spectral bandwidth.
- metallic mirrors can form the multipass cell in order to increase the reflection bandwidth and to make the dispersion as small as possible over an even larger area.
- the multi-pass cell it is also possible for the multi-pass cell to have dielectric mirrors, the medium and the overall dielectric mirrors exhibit anomalous overall dispersion. In this way, the multipass cell can generate the spectral broadening and, at the same time, a temporal compression (soliton self-compression) of the laser pulse replicas.
- FIG. 1 shows a schematic representation of an optical system according to the invention as a block diagram
- FIG. 2 dividing or combining element based on multiple reflections
- FIG. 3 shows a schematic representation of an optical system according to the invention in a second embodiment as a block diagram
- FIG. 4 shows a schematic representation of an optical system according to the invention in a third embodiment as a block diagram.
- an input laser beam from pulsed laser radiation from a laser source 1 is divided by means of a splitting element 2 into a number of spatially separated (and preferably parallel) partial beams.
- the function of the dividing element 2 is expediently based on an arrangement of partially reflective mirrors or polarizing beam splitters in a cascaded arrangement, diffractive elements or an arrangement of mirrors with zones of different reflectivity (see below).
- the spatially separated partial beams are coupled into a multi-pass cell 3. This has at least two mirrors, the spacing and shape of which are selected in accordance with a stable resonator configuration.
- a non-linear medium eg a transparent solid body or a gas
- SPM spontaneously
- Other non-linear processes can also generate new spectral components. In doing so, an approximately identical non-linear phase is impressed on all laser pulse replicas.
- the spatially separated partial beams do not have any optical path differences that are greater than the coherence length of the spectrally broadened ones
- the spectrally broadened laser pulse replicas are decoupled from the multipass cell 3 (e.g. through a hole in one of the mirrors), and then superimposed by a combination element 4 and combined in a spatially coherent manner. This can be followed by a pulse compression stage 5, e.g. with suitable chirped mirrors. Likewise, the mirrors of the
- FIG. 2 shows a division or combination element based on multiple reflections, as can be used in the system according to the invention.
- the element consists of four sub-elements A, B, C, D.
- the first sub-element A is a mirror with the highest possible reflectivity.
- the second sub-element B comprises (in the example shown), for example, four zones with different reflectivities.
- the laser beams take the path shown in FIG.
- the reflectivities of the zones of the sub-element B can be selected so that the incident input laser beam EL is divided into partial beams in a certain ratio.
- An example is a division into equal parts on all partial beams. This is achieved by choosing the reflectivities of the four zones of 75%, 66%, 50% and 0%.
- the outgoing four partial beams then fall on plane-parallel surfaces of the two sub-elements C and D, which are tilted relative to the sub-elements A, B.
- the sub-element C is again highly reflective.
- the sub-element D again has four zones of different reflectivity (as before). As a result, as shown, a two-dimensional array of 16 partial beams is generated in a plane perpendicular to the beam path.
- the number of zones of different reflectivity in the case of the sub-elements B and D can in each case be as desired, corresponding to the desired number of partial beams, ie corresponding to the splitting ratio. It should be noted that the number of Zones do not necessarily have to be the same as the number of partial beams. A zone can also reflect the beam several times.
- the splitting element 2 and the combination element 4 can be designed identically and arranged in such a way that the path length differences between the 16 partial beams almost cancel each other out (ideally within the coherence length).
- the foci of the parallel partial beams in the multi-pass cell 3 can overlap. This can lead to undesirable non-linear interactions between the partial beams.
- the peculiarity of the splitting / combination element shown in FIG. 2 is that the laser pulse replicas of the parallel partial beams are offset in time so that interactions between the laser pulse replicas are avoided.
- the time offset is determined by the distances between the highly reflective and the segmented mirrors and can be selected according to the laser pulse duration in the input laser beam. If necessary, impressed angles between the spatially separated partial beams can reduce or avoid an overlap of the foci.
- an array of power control elements 6 adapted to the partial beam array can be provided. In the simplest case, this can be achieved, for example, by an array of adjustable attenuators.
- a detection of path length differences in the sub-wavelength range takes place in the exemplary embodiment in FIG. 3 by means of an error signal detector 7.
- error signal detector 7 known arrangements can be used for this purpose (see, for example, Arno Klenke, Michael Müller, Henning Stark, Andreas Tünnermann, and Jens Limpert, "Sequential phase locking scheme for a filled aperture intensity coherent combination of beam arrays, "Opt. Express 26, 12072-12080, 2018).
- the correction or stabilization of the interferometric superposition in the Combination element 4 can be implemented by an array of phase modulators 8 (for example mirror array with piezo actuators), the geometry of which is in turn adapted to the partial beam array.
- the electronic control circuit used for this purpose is not shown in FIG.
- passive approaches can also be pursued.
- the input laser pulses are divided into at least two temporally separated laser pulse replicas with ideally identical pulse energy, in the example fine-tuned by a pulse-selective power control 9 in the division element 2 coherent combination at 4 to generate the output laser beam.
- the relative phase position of the laser pulse replicas and their stability are essential for a stable emission in which the majority of the pulse energy is contained in the output laser beam.
- Known approaches to detection and active stabilization can also be used here.
- elements for the detection of the relative phase position 10 and for the corresponding active regulation 11 are included in the structure for this purpose.
- the electronic control components are again not shown in FIG.
- passive approaches i.e. approaches that manage without control electronics
- polarizing elements e.g. thin-film polarizers or
- Polarization beam splitter can be used, or crystals with different transit times for different polarizations (birefringent crystals) can be used.
- a correspondingly inverted arrangement allows the coherent combination at 4.
- a beam reversal can take place at the exit of the system, ie after passing through the multipass cell 3, for example by means of a Faraday Rotators in combination with a highly reflective mirror. After the reflection, the laser pulse replicas propagate in the reverse direction through the multi-pass cell 3, the splitting element 2 being used for the combination in the reverse direction. It is important that the optical components used support the spectral bandwidth of the non-linearly broadened laser pulses, especially at the exit of the system.
- metallic mirrors can advantageously be used in the multi-pass cell 3, possibly consisting of a metallic layer on a substrate, which is characterized by good heat conduction (e.g. copper or sapphire).
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Lasers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020115753.3A DE102020115753B3 (de) | 2020-06-15 | 2020-06-15 | Kurzpuls-Lasersystem |
PCT/EP2021/065975 WO2021254963A1 (de) | 2020-06-15 | 2021-06-14 | Kurzpuls-lasersystem |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4165736A1 true EP4165736A1 (de) | 2023-04-19 |
Family
ID=76432407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21736977.6A Pending EP4165736A1 (de) | 2020-06-15 | 2021-06-14 | Kurzpuls-lasersystem |
Country Status (6)
Country | Link |
---|---|
US (1) | US20230275385A1 (de) |
EP (1) | EP4165736A1 (de) |
KR (1) | KR20230029787A (de) |
CN (1) | CN116171515A (de) |
DE (1) | DE102020115753B3 (de) |
WO (1) | WO2021254963A1 (de) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007048769B3 (de) | 2007-10-10 | 2009-01-29 | Laser-Laboratorium Göttingen eV | Lichtleiteranordnung, Herstellungsverfahren und Verwendung dafür |
DE102014007159B4 (de) * | 2014-05-15 | 2017-04-13 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren und Anordung zur spektralen Verbreiterung von Laserpulsen für die nichtlineare Pulskompression |
FR3087276B1 (fr) * | 2018-10-10 | 2021-05-14 | Amplitude Systemes | Systeme et procede de compression d'impulsions lumineuses breves ou ultrabreves et systeme laser a impulsions lumineuses associe |
DE102018125356A1 (de) | 2018-10-12 | 2020-04-16 | Active Fiber Systems Gmbh | Multi-Apertur-Lasersystem |
-
2020
- 2020-06-15 DE DE102020115753.3A patent/DE102020115753B3/de active Active
-
2021
- 2021-06-14 US US18/010,530 patent/US20230275385A1/en active Pending
- 2021-06-14 CN CN202180057102.5A patent/CN116171515A/zh active Pending
- 2021-06-14 KR KR1020237001421A patent/KR20230029787A/ko active Search and Examination
- 2021-06-14 WO PCT/EP2021/065975 patent/WO2021254963A1/de unknown
- 2021-06-14 EP EP21736977.6A patent/EP4165736A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
CN116171515A (zh) | 2023-05-26 |
WO2021254963A1 (de) | 2021-12-23 |
DE102020115753B3 (de) | 2021-07-08 |
KR20230029787A (ko) | 2023-03-03 |
US20230275385A1 (en) | 2023-08-31 |
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