# US 12,119,609 B2 · High intensity pulse laser generation system and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,119,609 B2 - Document ID: US12119609B2 - Status: Granted - Kind: B2 - Application number: 18/463,058 - Filed: 2023-09-07 - Published: 2024-06-27 - Granted: 2024-10-15 - Earliest claimed: 2022-12-22 - Assignees: Blue Laser Fusion, Inc. - Applicants: Blue Laser Fusion, Inc. - Inventors: Shuji Nakamura; Hiroaki Ohta - Web page: https://patentgrep.com/patent/US12119609B2 ## CPC - H01S 3/005: {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 (shaping laser beam for working metal or other materials B23K26/06; optical elements, systems or apparatus in general G02B)} - H01S 5/0085: {for modulating the output, i.e. the laser beam is modulated outside the laser cavity} - G21B 1/23: Optical systems, e.g. for irradiating targets, for heating plasma or for plasma diagnostics - H01S 5/0071: {for beam steering, e.g. using a mirror outside the cavity to change the beam direction} - H01S 5/10: Construction or shape of the optical resonator {, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region (H01S5/20 takes precedence)} - H01S 5/3235: {emitting light at a wavelength longer than 1000 nm, e.g. InP-based 1300 nm and 1500 nm lasers} - H02N 2/028: {along multiple or arbitrary translation directions, e.g. XYZ stages} - H10N 30/20: with electrical input and mechanical output, e.g. functioning as actuators or vibrators - H10N 35/00: Magnetostrictive devices (integrated devices or assemblies of multiple devices H10N39/00) - 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 - G21B: FUSION REACTORS (uncontrolled reactors G21J) - H02N: ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR - H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR ## Abstract In an example, the present invention provides a high intensity pulse laser generation system. The system has a variety of elements. The system has an optical cavity maintained in a vacuum, e.g., 300 Torr and less. In an example, the optical cavity is configured to increase an intensity of a laser beam comprising a pulse from a first energy power intensity to a second higher energy power intensity propagating on a first optical path configured within the optical cavity by circulating or reciprocating at least a portion of the laser beam. ## Claims ### Claim 1 A high intensity pulse laser generation system, the system comprising: an optical cavity, the optical cavity being configured to increase an intensity of a laser beam comprising a pulse from a first energy power intensity to a second higher energy power intensity propagating on a first optical path configured within the optical cavity by circulating or reciprocating at least a portion of the laser beam from a light source having a pulse energy power of 0.01 Joule to 1 Mega Joule on the first optical path; an optical path modification device coupled to the optical cavity, the optical path modification device configured to repeatedly change a spatial direction of the laser beam propagating on the first optical path at a predetermined timing to cause the laser beam propagating on the first optical path to change a direction from the first optical path to a second optical path that is outside of the first optical path thereby the optical path modification device is configured to propagate the laser beam on the second optical path generating a high intensity pulse laser beam; at least a pair of mirror devices, each of the mirror devices having a mirror surface area of 1 cm2 and 10000 cm2, and configured with the optical path modification device and provided within the first optical path, at least one the mirror devices configured to change a spatial position of the mirror device being coupled to the laser beam; a timing device configured with the optical path modification device and having a predetermined frequency to adjust the spatial position of the mirror device, the timing device being configured to adjust the spatial position of the mirror device after a predetermined number of cycles associated with the circulating or reciprocating of the laser beam propagating between at least the pair of mirrors such that each cycle of the laser beam progressively increases an intensity from the first energy power intensity to the second energy power intensity to an Nth energy power intensity, where N is an integer greater than 2, to the high intensity pulse laser beam on the second optical path; an spatial driver device coupled to the timing device and the one mirror device, the spatial driver device being configured to adjust the spatial position of the mirror device by changing a thickness of a volume structure by an expansion or contraction process to move the spatial position of the mirror device from a first position to a second position after the predetermined number of cycles. ### Claim 2 (depends on 1) The system of claim 1 wherein the spatial driver device comprising a magneto-strictive material that is in mechanical contact with a backside of the mirror devices that is adjusted or monolithically integrated with the backside of the mirror device. ### Claim 3 (depends on 2) The system of claim 2 wherein the mechanical contact is made using a surface region of the magneto-strictive material and a backside of the mirror device, the mechanical contact between the surface region of the magneto-strictive material and the backside surface are substantially matched in area. ### Claim 4 (depends on 2) The system of claim 2 wherein the change of thickness of the volume structure is spatially changed along a plane of the magneto-strictive material parallel to and facing a backside of the mirror device by modulating a magnetic field spatially with and coupled to the magnetic strictive material such that the mirror device is configured to tilt from a first angle to a second angle measured from a direction normal to the mirror surface area of the mirror device. ### Claim 5 (depends on 1) The system of claim 1 wherein the spatial driver device is configured to move the mirror device. ### Claim 6 (depends on 1) The system of claim 1 wherein the pair of mirrors comprise, respectively, a first flat mirror device and a second mirror device, the flat mirror being adjusted with the magneto-strictive material, and the second mirror device is configured with the first mirror device to change the direction of the laser beam from the first optical path to the second optical path. ### Claim 7 (depends on 6) The system of claim 6 wherein the second mirror device is a curved mirror device. ### Claim 8 (depends on 1) The system of claim 1 wherein the laser beam has a wavelength range from 1020 nm to 1070 nm. ### Claim 9 (depends on 1) The system of claim 1 wherein the optical path modification device changes an orientation of the mirror device in a time of less than 2 microseconds. ### Claim 10 (depends on 1) The system of claim 1, wherein each of the mirror devices has a reflectance to the laser beam of 99.9% or more. ### Claim 11 (depends on 1) The system of claim 1 wherein each of the mirror devices comprises a dielectric multilayer mirror surface that includes a fluorine compound. ### Claim 12 (depends on 1) The system of claim 1 wherein the laser beam from the light source comprises a pulsed laser with a frequency of more than 100 kHz. ### Claim 13 (depends on 1) The system of claim 1 wherein the laser beam from the light source is a single-mode laser. ### Claim 14 (depends on 1) The system of claim 1 wherein the light source comprises a semiconductor laser light source containing an AlInGaN-based compound. ### Claim 15 (depends on 1) The system of claim 1 wherein the pulse intensity of laser beam generated is at least 103 times greater than a pulse intensity of the laser beam from the light source. ### Claim 16 A high intensity pulse laser generation system, the system comprising: an optical cavity maintained in a vacuum, the optical cavity being configured to increase an intensity of a laser beam comprising a pulse from a first energy power intensity to a second higher energy power intensity propagating on a first optical path configured within the optical cavity by circulating or reciprocating at least a portion of the laser beam from a light source on the first optical path; an optical path modification device coupled to the optical cavity, the optical path modification device configured to repeatedly change a spatial direction of the laser beam propagating on the first optical path at a predetermined timing ranging from 20 milliseconds to 3 seconds with the response time from 0.01 microsecond to 30 microseconds to cause the laser beam propagating on the first optical path to change a direction from the first optical path to a second optical path that is outside of the first optical path thereby the optical path modification device is configured to propagate the laser beam on the second optical path generating a high intensity pulse laser beam; at least a pair of mirror devices, each of the mirror devices having a mirror surface area of 1 cm2 and 10000 cm2, and configured with the optical path modification device and provided within the first optical path, at least one the mirror devices configured to change a spatial position of the mirror device being coupled to the laser beam; a timing device configured with the optical path modification device and having a predetermined frequency to adjust the spatial position of the mirror device, the timing device being configured to adjust the spatial position of the mirror device after a predetermined number of cycles associated with the circulating or reciprocating of the laser beam propagating between at least the pair of mirrors such that each cycle of the laser beam progressively increases an intensity from the first energy power intensity to the second energy power intensity to an Nth energy power intensity, where N is an integer greater than 2, to the high intensity pulse laser beam on the second optical path; and a driver device coupled to the timing device and the one mirror device, the driver device being configured to adjust the spatial position of the mirror device to move the spatial position of the mirror device from a first position to a second position after the predetermined number of cycles. ### Claim 17 (depends on 16) The system of claim 16 wherein the adjustment in spatial position is provided such that the mirror device is configured to tilt from a first angle to a second angle measured from a direction normal to the mirror surface area of the mirror device; wherein the first angle to the second angle ranges from 0.1 degree to 5 degrees. ### Claim 18 (depends on 16) The system of claim 16 wherein the adjustment of the spatial position is provided such that the mirror device changes a direction of the laser beam from the first optical path to the second optical path by changing a spatial location of an incidence of the laser beam on the mirror device from a first location of the mirror surface area to a second location of the mirror surface area. ### Claim 19 A method of high intensity pulse laser generation system, the system comprising: in an optical cavity configured to increase an intensity of a laser beam comprising a pulse from a first energy power intensity to a second higher energy power intensity propagating on a first optical path configured within the optical cavity by circulating or reciprocating at least a portion of the laser beam from a light source having a output power of 0.01 Joule to 1 Mega Joule on the first optical path coupled to an optical path modification device coupled to the optical cavity, the optical path modification device configured to repeatedly change a spatial direction of the laser beam propagating on the first optical path at a predetermined timing to cause the laser beam propagating on the first optical path to change a direction from the first optical path to a second optical path that is outside of the first optical path thereby the optical path modification device is configured to propagate the laser beam on the second optical path generating a high intensity pulse laser beam and at least a pair of mirror devices configured with the optical path modification device and provided within the first optical path, at least one the mirror devices configured to change a spatial position of the mirror device being coupled to the laser beam; adjusting the spatial position of the mirror device using a timing device after a predetermined number of cycles associated with the circulating or reciprocating of the laser beam propagating between at least the pair of mirrors such that each cycle of the laser beam progressively increases an intensity from the first energy power intensity to the second energy power intensity to an Nth energy power intensity, where Nis an integer greater than 2, to the high intensity pulse laser beam on the second optical path. ### Claim 20 (depends on 19) The method of claim 19 wherein at least one of the mirror devices comprises a deformable mirror surface.