Method and device capable of continuously and synchronously measuring high power laser pulse energy, space distribution and pulse width
A technology of synchronous measurement and laser pulse, which is applied in the direction of measuring device, photometry, optical radiation measurement, etc., can solve the problems of no specific technical solution and implementation device for detection, no clear simultaneous measurement, etc., and achieve evaluation and traceability, avoid measurement inaccuracy, reduce the effect of energy
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Embodiment 1
[0029] Such as figure 1 As shown, the high-power laser energy, spatial distribution and pulse width measurement device includes spectroscopes 1, 2, 3, energy meter probe 4, infrared CCD 5, and PIN photodetector 6;
[0030] The high-power laser beam to be measured with a certain repetition frequency passes through the beam splitter 1. The reflectivity of the beam splitter 1 is 10%, and 10% of the laser light will be reflected to the beam splitter 2. The reflectivity of the beam splitter 2 is 10%, and 90% of the energy After passing through the beam splitter 2, it is incident on the energy meter probe 4, which is used for the first sampling of high-power laser. The acquisition card transmits the data to a high-performance workstation for calculation and processing.
[0031] After passing through the beam splitter 2, 10% of the laser light will be reflected and transmitted forward through the beam splitter 3. The reflectivity of the beam splitter is 10%, then 90% of the laser en...
Embodiment 2
[0037] The main difference between this embodiment and Embodiment 1 is that, compared with the beam splitters 1, 2, and 3 with a reflectance of 10%, what this embodiment uses are the beam splitters 1, 2, and 3 with a reflectance of 5%. The laser energy incident to the energy meter probe is reduced, the damage probability of the energy meter is reduced, and the energy measurement range can be expanded on the premise that the energy meter probe can accurately detect the laser energy.
[0038] Assuming that the reading of the energy meter is d, the pulse energy of the high-power laser is a=d / 0.0475;
[0039] For a high-energy laser with an energy of 10J, the final laser energy incident on the energy meter probe is only 0.475J.
[0040] All data are imported into high-performance processing workstations through different high-speed data acquisition cards, realizing continuous and synchronous monitoring of laser energy, spatial distribution and pulse width during processing, and real...
Embodiment 3
[0042] The main difference between this embodiment and Embodiment 1 is that the laser transmitted by the beam splitter 1 is directly used in the laser shock peening process, and the continuous and simultaneous measurement of the energy, spatial distribution and pulse width of the high-power pulsed laser during the laser shock peening process is realized. , and avoid laser energy redundancy.
[0043] Assuming that the data detected by the energy meter is d, the pulse energy of the high-power laser is a=d / 0.09;
[0044] For a high-power laser with an energy of 10J, the final laser energy incident on the energy meter probe is actually only 0.9J. Finally, it is applied to laser shock strengthening, and the laser energy acting on the surface of the processed part is 9J.
[0045] All data are imported into high-performance processing workstations through different high-speed data acquisition cards, realizing continuous and synchronous monitoring of laser energy, spatial distributio...
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