Diagnostic Technique for Pulsed Nd3+. YAG Temporal and Spatial Beam Parameters in a Focal Volume.
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概要
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This paper describes a direct diagnostic technique to measure the 2-dimensional power density distribution in the focal volume of a high-power and pulsed Nd<SUP>3+</SUP>: YAG laser for materials processing. A rotating-pinhole laser beam analyzer combined with a signal-pulse generator was used to measure the power density distribution of a 1.06μm wavelength beam, while synchronizing the output of the pulsed laser with the motion of the pinhole. Measurements were carried out with a Nd<SUP>3+</SUP>: YAG rod under the thermal stationary conditions and results were obtained.<BR>Reproducibility of measured power density distribution is very good with high temporal and spatial resolution. The focused 1/e<SUP>2</SUP> beam diameter of waveform-controlled pulses has a constant value without depending on the intensity of the laser pulses. Only the mean-power density is proportional to the power of the laser pulses. The power density distribution of a short pulse length of 0.3 ms width can be also measured precisely.
- 社団法人 レーザー学会の論文
社団法人 レーザー学会 | 論文
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