| 超短脉冲激光时域参数计量标准装置 |
| Measurement standard for temporal parameters of ultrashort pulse laser |
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| 中文摘要: |
| 长期以来，由于缺乏超短脉冲激光时域参数计量标准装置，导致超短脉冲激光器和超短脉冲激光测量仪器无法溯源。针对此问题，研制了超短脉冲激光光谱相位干涉测量仪，利用小波变换技术实现了飞秒脉冲激光光谱相位的自动准确提取，精确还原了超短脉冲光谱相位，重建了脉冲时域波形，测量范围覆盖10~500 fs，测量不确定度Urel=8%（k=2）；研制了大量程自相关测量装置，实现了10 fs~50 ps量程超短脉冲宽度的准确测量和量值溯源，解决了超短脉冲时域参数测量仪器的溯源问题，测量不确定度Urel=10%（k=2）；建立了“超短光脉冲自相关仪校准装置”国家计量标准，测量范围覆盖10 fs~12 ps，测量不确定度Urel=10%（k=2），为超短脉冲测量仪器提供了精确校准手段，对于保障超短脉冲时域参数测量结果精准统一具有重要意义。 |
| 英文摘要: |
| Temporal parameters of ultrashort pulse laser and ultrashort pulse laser measuring instrument cannot be traced to the International System of Units for a long time due to the lack of measurement standards. This paper introduces the measurement standard for time-domain parameters of ultrashort pulse laser at the National Institute of Metrology (NIM), China. An instrument based on Spectral Phase Interferometry for Direct Electric-field Reconstruction (SPIDER) was constructed. The spectral phase of femtosecond pulse laser was automatically and accurately extracted with wavelet-transform technology, and the time-domain waveform of the ultrashort pulses was precisely reconstructed with the inverse Fourier-transform technique. The expanded uncertainty is Urel=8% (k=2) in a measurement range of 10~500 fs. A large range autocorrelator was developed. The accurate measurement and traceability of ultrashort pulse width in the range of 10 fs~50 ps are realized, and the expanded uncertainty is Urel=10% (k=2). The national measurement standard "Calibration setup for ultrashort optical pulse autocorrelators” was established, and the expanded uncertainty is Urel=10% (k=2) in a measurement range of 10 fs~12 ps. The measurement standard provides an accurate traceable standard for ultrashort pulse measurement instruments, and plays an important role in ensuring the accuracy and consistency for the measurement results of ultrashort pulse temporal parameters. |
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| 中文关键词: 超快光学计量 计量标准 相位还原 自相关法 |
| 英文关键词:ultrafast optical metrology measurement standard phase retrieval autocorrelation |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2022.05.10 |
| 引用本文：邓玉强.超短脉冲激光时域参数计量标准装置[J].计测技术,2022,(5):. |
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