# US 2014/0195035 A1 · Laser output control device, laser oscillator, and laser output control method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0195035 A1 - Document ID: US20140195035A1 - Status: Published application - Kind: A1 - Application number: 14/238,326 - Filed: 2013-04-15 - Published: 2014-07-10 - Earliest claimed: 2012-06-26 - Assignees: Mitsubishi Electric Corporation - Applicants: Mitsubishi Electric Corporation - Inventors: Toshiki Koshimae; Teruaki Fukuoka - Web page: https://patentgrep.com/patent/US20140195035A1 ## CPC - G05B 19/182: {characterised by the machine tool function, e.g. thread cutting, cam making, tool direction control (G05B19/21 - G05B19/40 take precedence)} - B23K 26/03: Observing, e.g. monitoring, the workpiece - B23K 26/0622: by shaping pulses - B23K 26/083: {Devices involving movement of the workpiece in at least one axial direction} - B23K 26/0869: {Devices involving movement of the laser head in at least one axial direction} - B23K 37/0235: {the guide member forming part of a portal} - H01S 3/1306: {Stabilisation of the amplitude} - H01S 3/1312: {by controlling the optical pumping} - H01S 3/10046: {Pulse repetition rate control (H01S3/11 takes precedence)} - H01S 3/10069: {Memorized or pre-programmed characteristics, e.g. look-up table [LUT]} - H01S 3/1024: {for pulse generation} - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) - 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 - 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 A laser output control device controlling a laser oscillator includes: a switching section that switches, based on the basis of the size of a pulse width of a laser output command, a current command value used for controlling output of the laser light to either one of peak value control and average value control; a peak value command generating section generating a current command value for performing peak value control; and an average value command generating section generating a current command value for performing average value control; wherein an output value of the laser light measured by one measuring section is input to the peak value command generating section and the average value command generating section, and the current command value is generated such that the output value of the laser light becomes a value that corresponds to the laser output command. ## Claims ### Claim 1 A laser output control device controlling a laser oscillator that outputs a laser light, comprising: a pulse-width calculating section calculating a pulse width during which the laser light is laser-oscillating on the basis of a laser output command used when generating an output waveform of the laser light; a switching section switching, on the basis of the size of the pulse width, a control method to either one of peak value control, in which control is performed using a peak value of a pulse shape, and average value control, in which control is performed using an average value of a pulse shape, for calculating a current command value used for controlling the laser oscillator; a peak value command generating section generating, on the basis of an output value of the laser light output from the laser oscillator, a current command value using the peak value of the pulse shape such that the output value becomes a value that corresponds to the laser output command, when performing the peak value control on the laser oscillator; and an average value command generating section generating, on the basis of an output value of the laser light output from the laser oscillator, a current command value using the average value of the pulse shape such that the output value becomes a value that corresponds to the laser output command when performing the average value control on the laser oscillator, wherein the output value of the laser light measured by one measuring section is input to the peak value command generating section and the average value command generating section. ### Claim 2 (depends on 1) The laser output control device according to claim 1, wherein the pulse-width calculating section further calculates, on the basis of the laser output command, a pulse interval, the pulse interval being time during which the laser light is not laser-oscillating, and the switching section switches, on the basis of the size of the pulse width and the size of the pulse interval, the control method to either one of the peak value control and the average value control. ### Claim 3 (depends on 1) The laser output control device according to claim 1, wherein the switching section switches the control method to the peak value control when the pulse width is longer than a first set time, and switches the control method to the average value control when the pulse width is equal to or less than the first set time. ### Claim 4 (depends on 2) The laser output control device according to claim 2, wherein the switching section switches the control method to the peak value control when the pulse width is longer than a first set time and the pulse interval is longer than a first second set time, switches the control method to the average value control when the pulse width is equal to or less than the first set time and the pulse interval is longer than the second set time, switches the control method to the average value control when the pulse width is longer than the first set time and the pulse interval is equal to or less than the second set time, and switches the control method to the average value control when the pulse width is equal to or less than the first set time and the pulse interval is equal to or less than the second set time. ### Claim 5 (canceled) ### Claim 6 A laser oscillator outputting a laser light, comprising: a laser output control device controlling output of the laser light by outputting a current command value; a power source section generating, on the basis of the current command value, a current used for outputting the laser light; a resonator outputting the laser light using the current generated by the power source section; and a measuring section measuring an output value of the laser light, wherein the laser output control device includes a pulse-width calculating section calculating a pulse width during which the laser light is laser-oscillating on the basis of a laser output command used when generating an output waveform of the laser light, a switching section switching, on the basis of the size of the pulse width, a control method to either one of peak value control, in which control is performed using a peak value of a pulse shape, and average value control in which control is performed using an average value of a pulse shape, for calculating the current command value used for controlling the laser oscillator, a peak value command generating section generating, on the basis of the output value of the laser light output from the resonator, a current command value using the peak value of the pulse shape such that the output value becomes a value that corresponds to the laser output command when performing the peak value control on the resonator, and an average value command generating section generating, on the basis of the output value of the laser light output from the resonator, a current command value using the average value of the pulse shape such that the output value becomes a value that corresponds to the laser output command when performing the average value control on the resonator, wherein the output value of the laser light measured by one measuring section is input to the peak value command generating section and the average value command generating section. ### Claim 7 A laser output control method for controlling a laser oscillator that outputs a laser light, comprising: a pulse-width calculation step of calculating a pulse width during which the laser light is laser-oscillating on the basis of a laser output command used when generating an output waveform of the laser light; a switching step of switching, on the basis of the size of the pulse width, a control method to either one of peak value control, in which control is performed using a peak value of a pulse shape, and average value control, in which control is performed using an average value of a pulse shape, for calculating a current command value used for controlling the laser oscillator; a peak value command generating step of generating, on the basis of an output value of the laser light output from the laser oscillator, a current command value using the peak value of the pulse shape such that the output value becomes a value that corresponds to the laser output command when performing the peak value control on the laser oscillator; and an average value command generating step of generating, on the basis of an output value of the laser light output from the laser oscillator, a current command value using the average value of the pulse shape such that the output value becomes a value that corresponds to the laser output command when performing the average value control on the laser oscillator, wherein both when the peak value control is performed and when the average value control is performed, the output value of the laser light measured by one measuring section is input.