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Using the technology of tuneable diode laser absorption spectroscopy and the technology of micro-electronics, a fiber laser methane sensor based on C8051F410 is given. We use the DFB Laser as the light source of the sensor. By tuning temperature and driver current of the DFB laser, we can scan the laser over the methane absorption line, we realize the methane detection. It makes the real-time and online detection of methane concentration to be true, and it has the advantages just as highdoi:10.1016/j.proeng.2011.11.2291 fatcat:jw6mp2ohvvhnhisf7jl52u6t44