Ruhr University Bochum, Photonics and Terahertz Technology, Faculty of Electrical Engineering and In, Germany.
J Biomed Opt. 2019 Apr;24(4):1-8. doi: 10.1117/1.JBO.24.4.046001.
We analyze transducer-matched multipulse excitation as a method for improving of the signal-to-noise ratio (SNR) for diode laser-based photoacoustic systems. We discuss the principle of the technique, its advantages, and potential drawbacks and perform measurements to analyze the obtainable SNR increase. We show in experiment and computationally that a lower boundary estimate of 1.2 to 1.8 fold SNR improvement can be provided using transducer-matched pulse bursts, depending on the transducer and particular arrangement. Finally, we analyze implications that the transducer resonance effects may have on the recently introduced advanced photoacoustic techniques. The findings are of immediate interest to modalities utilizing dense pulse sequences and systems possessing limited pulse energy. In particular, transducer-matched multipulse excitation may be beneficial for diode-based photoacoustic systems operated with transducers in the range of 1 to 5 MHz since the required hardware is readily available.
我们分析了换能器匹配多脉冲激发作为提高基于二极管激光的光声系统信噪比 (SNR) 的一种方法。我们讨论了该技术的原理、优点和潜在的缺点，并进行了测量以分析可获得的 SNR 提高。我们通过实验和计算表明，使用换能器匹配的脉冲串可以提供 1.2 到 1.8 倍的 SNR 提高下限估计，具体取决于换能器和特定的布置。最后，我们分析了换能器共振效应对最近引入的先进光声技术的可能影响。这些发现对利用密集脉冲序列的模态和具有有限脉冲能量的系统具有直接的兴趣。特别是，对于工作在 1 到 5MHz 范围内的基于二极管的光声系统，换能器匹配的多脉冲激发可能是有益的，因为所需的硬件很容易获得。
