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Pulse stretching technique for laser bond inspection, laser ultrasonic inspection, and laser peening
Pulse stretching technique for laser bond inspection, laser ultrasonic inspection, and laser peening
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机译：激光粘接检测，激光超声波检查和激光喷丸脉冲拉伸技术
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摘要
An example laser system includes a laser, a plurality of pulse stretchers coupled together in series, a feedback module, and a lens assembly. The plurality of pulse stretchers is configured to stretch pulse widths of laser pulses provided by the laser and to output stretched laser pulses. The feedback module includes a pulse delay comparator that is configured to compare a first laser pulse of the laser pulses to a corresponding first stretched laser pulse of the stretched laser pulses. The feedback module also includes a computing device that is configured to determine, based on a result of the comparing by the pulse delay comparator, an adjustment to a pulse stretcher of the plurality of pulse stretchers, and apply the adjustment to the pulse stretcher so as to modify a shape of a second stretched laser pulse of the stretched laser pulses.
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