# US 9,435,964 B2 · Systems and methods for laser systems with variable beam parameter product > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,435,964 B2 - Document ID: US9435964B2 - Status: Granted - Kind: B2 - Application number: 14/747,073 - Filed: 2015-06-23 - Published: 2015-11-19 - Granted: 2016-09-06 - Earliest claimed: 2014-02-26 - Assignees: Teradiode, Inc. - Applicants: Parviz Tayebati; Wang-Long Zhou; Bien Chann; Bryan Lochman - Inventors: Parviz Tayebati; Wang-Long Zhou; Bien Chann; Bryan Lochman - Web page: https://patentgrep.com/patent/US9435964B2 ## CPC - G02B 6/4206: {Optical features (G02B6/4207, G02B6/421 take precedence)} - B23K 26/0626: {Energy control of the laser beam (B23K26/0622 takes precedence)} - G02B 6/2706: {as bulk elements, i.e. free space arrangements external to a light guide, e.g. polarising beam splitters} - G02B 6/32: having lens focusing means {positioned between opposed fibre ends (with lens being an integral part of the single fibre end G02B6/262)} - G02B 6/4214: {the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device (G02B6/4246 takes precedence)} - G02B 6/4215: {the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers (G02B6/4246 takes precedence)} - G02B 6/4296: {coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources} - G02F 1/33: Acousto-optical deflection devices {(circuit or control arrangements therefor G02F1/113)} - G02F 1/332: {comprising a plurality of transducers on the same crystal surface, e.g. multi-channel Bragg cell} - H01S 3/0071: {Beam steering, e.g. whereby a mirror outside the cavity is present to change the beam direction} - H01S 3/08086: {Multiple-wavelength emission} - H01S 3/23: Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media - G02F 2201/02: fibre - G02F 2203/06: Polarisation independent - G02F 2203/28: focussing or defocussing - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM - 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 - 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 ## Abstract In various embodiments, a beam-parameter adjustment system and focusing system alters a spatial power distribution of a radiation beams before the beam is coupled into an optical fiber or delivered to a workpiece. ## Claims ### Claim 1 A laser delivery system for receiving and altering a spatial power distribution of a radiation beam from a beam source and focusing the radiation with the altered spatial power distribution onto a workpiece, the system comprising: a first acousto-optic element for receiving the radiation beam and altering a beam quality of the radiation beam along a first direction; a first acoustic transducer for generating sound waves within the first acousto-optic element, thereby altering an index of refraction of at least a portion of the first acousto-optic element in a periodic pattern; focusing optics for receiving the altered beam and focusing the altered beam on the workpiece; a controller for controlling the first acoustic transducer and/or the first acousto-optic element to achieve a target altered spatial power distribution on the workpiece; a second acousto-optic element for receiving the radiation beam and altering a beam quality of the radiation beam along a second direction different from the first direction; and a second acoustic transducer for generating sound waves within the second acousto-optic element, thereby altering an index of refraction of at least a portion of the second acousto-optic element in a periodic pattern, wherein the controller is configured to control the second acoustic transducer and/or the second acousto-optic element to achieve the target altered spatial power distribution on the workpiece. ### Claim 2 (depends on 1) The system of claim 1, wherein the first direction is substantially orthogonal to the second direction. ### Claim 3 (depends on 1) The system of claim 1, further comprising, disposed optically upstream of the first acousto-optic element, collimating optics for collimating the radiation beam. ### Claim 4 A laser delivery system for receiving and altering a spatial power distribution of a radiation beam from a beam source and focusing the radiation with the altered spatial power distribution onto a workpiece, the system comprising: a first acousto-optic element for receiving the radiation beam and altering a beam quality of the radiation beam along a first direction; a first acoustic transducer for generating sound waves within the first acousto-optic element, thereby altering an index of refraction of at least a portion of the first acousto-optic element in a periodic pattern; focusing optics for receiving the altered beam and focusing the altered beam on the workpiece; a controller for controlling the first acoustic transducer and/or the first acousto-optic element to achieve a target altered spatial power distribution on the workpiece; and a second acoustic transducer for generating sound waves within the first acousto-optic element in a second direction different from the first direction, thereby altering an index of refraction of at least a portion of the first acousto-optic element in a periodic pattern, wherein (i) the first acousto-optic element alters a beam quality of the radiation beam along the second direction, and (ii) the controller is configured to control the second acoustic transducer to achieve the target altered spatial power distribution on the workpiece. ### Claim 5 (depends on 4) The system of claim 4, wherein the first direction is substantially orthogonal to the second direction. ### Claim 6 (depends on 1) The system of claim 1, wherein the radiation beam is a multi-wavelength beam.