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In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
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All Single-Mode-Fiber Supercontinuum Source Setup for Monitoring of Multiple Gases Applications.
Javier A Martin-Vela1, Eloisa Gallegos-Arellano2, Juan M Sierra-Hernández1
1Departamento de Ingenieria Electronica, Division de Ingenierias, Universidad de Guanajuato, Carretera Salamanca-Valle de Santiago km 3.5 + 1.8, Comunidad de Palo Blanco, Salamanca Gto. C.P. 36885, Mexico.
A novel gas sensing system uses a single-mode-fiber supercontinuum source (SMF-SC) for simultaneous detection of water vapor and acetylene. This broadband absorption spectroscopy system demonstrates high sensitivity for acetylene detection.
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Area of Science:
- Optics and Photonics
- Spectroscopy
- Gas Sensing Technology
Background:
- A gas sensing system utilizing a conventional absorption technique with a single-mode-fiber supercontinuum source (SMF-SC) is detailed.
- The SMF-SC was generated by directing microchip laser pulses into a 1 km single-mode fiber, producing a stable, broad spectrum (350 nm bandwidth) from 1350 to 1700 nm.
Discussion:
- The system simultaneously senses water vapor (1350-1420 nm) and acetylene (1510-1540 nm).
- Acetylene absorption peaks reached ~30 dB depth with ~60 strong lines, indicating high sensitivity.
- Experimental spectra were validated against Hitran database simulations.
Key Insights:
- The SMF-SC enables broadband absorption spectroscopy for multiple gas detection.
- The system exhibits high sensitivity for acetylene sensing.
- Experimental results align with theoretical simulations, confirming system accuracy.
Outlook:
- Potential for developing advanced sensors for broadband absorption spectroscopy.
- Feasible as a cost-effective absorption spectrophotometer for multiple gases.
- Further research could explore additional gas targets and optimize system performance.