Self-calibrated Fourier transform spectrometer for laser-induced fluorescence spectroscopy with single-photon avalanche diode detection.
Self-calibrated Fourier transform spectrometer for laser-induced fluorescence spectroscopy with single-photon avalanche diode detection.
复制标题
用于激光诱导荧光光谱的自校准傅立叶变换光谱仪，具有单光子雪崩二极管检测功能。
DOI：
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发表时间：
2022
影响因子：
1.9
通讯作者：
C. Parker
中科院分区：
文献类型：
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作者：
Vinod Gaire;C. Parker
傅里叶变换光谱仪通常用于科学和工业环境，因为它们能够以高信噪比记录完整的光谱。使用单光子雪崩二极管作为检测器提高了灵敏度，但增加了与检测器饱和和采集时间超过典型扫描时间相关的激光诱导荧光应用中的复杂性。在这里，我们报告了一个光谱仪的检测激光诱导荧光信号与激发光，并使用二次谐波信号的激发光来校正相位和校准光谱，消除了需要一个单独的校准源。我们在1140.2 nm的波长范围内实现了0.4cm-1的分辨率，并证明了对功率低至377 fW的信号的检测，本底噪声为172 fW/cm-1。
Fourier transform spectrometers are commonly used in scientific and industrial settings because of their ability to record complete spectra with high signal-to-noise ratios. Using a single-photon avalanche diode as the detector improves the sensitivity but adds complications in laser-induced fluorescence applications related to detector saturation and acquisition time exceeding the typical scan time. Here, we report a spectrometer for the detection of laser-induced fluorescence signal together with the excitation light, and use the second harmonic signal from the excitation light to correct the phase and calibrate the spectrum, removing the need for a separate calibration source. We achieve a resolution of 0.4cm-1 in the wavelength range of 1140.2 nm, and demonstrate detection of signals with powers as low as 377fW, with a noise floor of 172fW/cm-1.