Ganshang Si, Jiaxiang Liu, Zhengang Li, Zhiqiang Ning, Yonghua Fang. Quartz tube enhanced Raman fiber probe for powder detection[J]. Infrared and Laser Engineering, 2022, 51(12): 20220187
- Infrared and Laser Engineering
- Vol. 51, Issue 12, 20220187 (2022)
Fig. 1. Schematic diagram of the interaction between light and turbid medium
Fig. 2. Transmitted and reflected light intensity varies with sample thickness
Fig. 3. Sample detection using quartz tube enhanced Raman fiber probe
Fig. 4. Transmittance curves of quartz glass
Fig. 5. Structure of tapered quartz tube
Fig. 6. Metal-coated hollow core fiber
Fig. 7. Comparison diagram of spectral backgrounds of different fibers
Fig. 8. Quartz tube enhanced fiber Raman probe. (a) Schematic diagram of probe design; (b) Schematic diagram of probe section; (c) Physical of Raman probe
Fig. 9. Raman spectroscopy experiment setup. (a) Schematic diagram; (b) Physical diagram
Fig. 10. Powder detection with different probes. (a) Schematic diagram; (b) Experimental results
Fig. 11. Experimental setup and results of powder samples detection at different depths. (a) Experimental setup; (b) Probe-to-bottom=0.5 cm; (c) Probe-to-bottom=3.5 cm; (d) Probe-to-bottom=6.5 cm
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