LIGHT-INDUCED THERMOSLASTIC SPECTROSCOPY GAS SENSING BASED ON HOLLOW CORE FIBER ABSORPTION CELL
Citation
冯薇 (Feng Wei). (2022, June). 基于空芯光纤吸收池的光致热弹光谱气体检测技术研究 [LIGHT-INDUCED THERMOSLASTIC SPECTROSCOPY GAS SENSING BASED ON HOLLOW CORE FIBER ABSORPTION CELL] (硕士学位论文) [Dissertation for the Master Degree in Engineering], 哈尔滨工业大学 [Harbin Institute of Technology]
Keywords
- Light-induced thermoelastic spectroscopy (LITES)
- Hollow core fiber (HCF)
- Absorption cell
- Trace gas detection
- Environmental monitoring
- Explosive compound measurement
- Respiratory diagnosis
- Industrial production process control
- Combustion process optimization
- Pollution emission reduction
- Multi-pass cell (MPC)
- Optical path absorption
- Finite element method (FEM)
- Optical coupling efficiency
- Hollow core photonic bandgap fiber (HC-PBGF)
- Acetylene (C2H2)
- Minimum detection limit (MDL)
- Mode interference
- Hollow-core anti-resonant fiber (HC-ARF)
- Noise suppression
- Carbon monoxide (CO)
Brief
This master's thesis investigates a light-induced thermoelastic spectroscopy (LITES) gas sensing technique utilizing hollow-core fibers (HC-PBGF and HC-ARF) as absorption cells, achieving minimum detection limits of 1417 ppm for C2H2 with HC-PBGF and 4.75 ppm for C2H2 and 1704 ppm for CO with HC-ARF, demonstrating the potential of HC-ARF for enhanced sensitivity due to its noise suppression capabilities.
Summary
This master's thesis investigates light-induced thermoelastic spectroscopy (LITES) using hollow-core fibers (HC-PBGF and HC-ARF) as absorption cells for trace gas detection. The research compares the performance of HC-PBGF and HC-ARF for detecting acetylene (C2H2), achieving a minimum detection limit (MDL) of 1417 ppm with HC-PBGF and a significantly better 4.75 ppm with HC-ARF. The study also demonstrates the capability of HC-ARF for detecting carbon monoxide (CO) with an MDL of 1704 ppm, highlighting the better noise suppression of HC-ARF for enhanced sensitivity.
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