A numerical simulation of a near-infrared three-channel trace ammonia detection system using hollow core photonic crystal fiber
| Autor: | Chaojian He, Yuting Zhang, Haijuan Yu, Yun-Rui Bai, Xuechun Lin, Zhangwang Miao, Rui Dou |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Absorption spectroscopy Dynamic range business.industry Noise (signal processing) Orders of magnitude (temperature) Photodetector 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention 010309 optics law 0103 physical sciences Optoelectronics Electrical and Electronic Engineering 0210 nano-technology business Sensitivity (electronics) Photonic-crystal fiber |
| Zdroj: | Optik. 227:166006 |
| ISSN: | 0030-4026 |
| DOI: | 10.1016/j.ijleo.2020.166006 |
| Popis: | A simulation model of the fiber-structure trace ammonia detection system based on near-infrared laser absorption spectroscopy is proposed. The distributed feed-back (DFB) diode laser modulation, photodetector, and signal processing are simulated by programming using matlab code while the noise amplitude selected to the sampling accuracy of commercial 12-bit ADC. The wavelength 1512 nm was selected to calculate the absorption coefficient of mixture containing ammonia, carbon dioxide, and water vapor. When the length of fiber-structure gas chamber was set to 10 cm, 1 m, and 10 m, respectively, ammonia with concentration from 0.2 ppm to 10,060 ppm can be detected. The dynamic range of this simulation have covered 5 orders of magnitude which never achieves in traditional detection system. Our work provides a potentially valuable option to establish the ammonia detection system of more portable, high sensitivity, and large detection range. |
| Databáze: | OpenAIRE |
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